// SPDX-FileCopyrightText: 2025-2026 Kforge Labs <https://github.com/malkuthro/ComfyUI-Koolook>
// SPDX-License-Identifier: GPL-3.0-only

// =============================================================================
// Sidebar tree — section-registry engine, data gathering, DOM row factories,
// folder builder, context menus for workflow/directory rows, and the panel
// renderer (search, action bars, tree mount, event subscriptions).
//
// `pathStates` is module-private — folder expansion state survives across
// re-renders triggered by saves, picks-changed events, or storage events.
// Stale path keys are pruned every render against the set of paths actually
// emitted, so renames and deletes don't leak entries.
// =============================================================================
import {
    REPOS,
    ROOT_GROUP_LABEL,
    WORKFLOWS_GROUP_LABEL,
    STORAGE_KEY,
    WORKFLOWS_FALLBACK_KEY,
    PICKS_CHANGED_EVENT,
    WORKFLOWS_CHANGED_EVENT,
    SNAPSHOT_STATUS_CHANGED_EVENT,
    GROUP_MODE_KEY,
    GROUP_MODE_DEFAULT,
    MODULE_TAG,
    GUIDE_URL,
    GITHUB_REPO_URL,
    ensureStyle,
    toast,
    compareNames,
} from "./constants.js";
import { formatLocalStamp } from "./format_time.js";
import {
    loadUserPicks,
    removeFromMyPicks,
    notifyPicksChanged,
    addToMyPicks,
    loadAutoPullHidden,
    hideAutoPullType,
    setPicksRenderSource,
    clearPicksRenderSource,
} from "./picks_store.js";
import {
    persistMutation,
    listDirectoryNames,
    dirOf,
    addDirectory,
    renameDirectory,
    deleteDirectory,
    saveWorkflowEntry,
    copyWorkflowIntoStore,
    copyWorkflowIntoLiveStore,
    copyFolderIntoStore,
    copyFolderIntoLiveStore,
    archiveWorkflow,
    unarchiveWorkflow,
    renameWorkflow,
    deleteWorkflow,
    moveWorkflow,
    moveDirectory,
    clearArchive,
    cleanUpArchive,
    getArchiveCleanupPlan,
    getArchiveDisplayInfo,
    pathsEqual,
    getWorkflowGraph,
    getWorkflowTags,
    workflowHasTag,
    PUBLISHED_TAG,
    isWorkflowModule,
    addTag,
    removeTag,
    getAllWorkflowsForExport,
    setWorkflowsRenderSource,
    clearWorkflowsRenderSource,
} from "./workflows_store.js";
import { diffPicks, diffWorkflows, getWorkflowEntryFromStore } from "./snapshot_diff.js";
import { checkForUpdate, renderUpdateFooter } from "./update_check.js";
import {
    serializeFullCanvas,
    serializeSelection,
    canvasIsNonEmpty,
    captureWorkflowApiPrompt,
    loadWorkflowOntoCanvas,
    insertWorkflowOntoCanvas,
    insertNode,
    getSelectedNodeTypes,
    getSelectedNodeCount,
    getCanvasNodeCount,
    dropPlaceholdersForPacks,
} from "./canvas_io.js";
import { discoverMissingPacks } from "./installer.js";
import {
    showInputModal,
    showConfirmModal,
    showSaveWorkflowModal,
    showContextMenu,
    showTagsModal,
    showPublishSetupModal,
    showInstallMissingModal,
    showSaveSnapshotDialog,
    showLoadSnapshotDialog,
} from "./modals.js";
import { attachHoverPreview, teardownPreview } from "./node_preview.js";
import { publishSavedWorkflowSetup, revealPublishedSetupFolder } from "./published_setups.js";
import {
    sanitizeName,
    gatherSnapshot,
    applySnapshot,
    listPresets,
    readPreset,
    writePreset,
    presetExists,
    deletePreset,
    getLibraryInfo,
    saveSettings,
    browseDirectories,
    createBrowseDirectory,
    getCurrentPresetName,
    setCurrentPresetName,
    exportStarterPreset,
    writePreLoadAutosave,
    markStateSaved,
    markStateAutosaved,
    getSnapshotStatus,
    listAutosaves,
    revealPresetFolder,
} from "./snapshot.js";
import { resolveFolderExpanded } from "./tree_expansion.js";

// =============================================================================
// Built-in section IDs. These are also pathState key prefixes — every
// `pathStates` entry begins with one of these strings followed by `/`. The
// engine handles the prefixing for paths emitted via `ctx.folder({path: …})`,
// but `renderPanel`'s save flow has to construct pin keys directly, so the
// constants are exported here (module-private) instead of duplicated as
// literals.
// =============================================================================
const SECTION_ID_NODES = "nodes";
const SECTION_ID_WORKFLOWS = "workflows";
const SECTION_ID_TAGS = "tags";

// When true, the Workflows section is pruned to only `published`-tagged
// workflows (folders kept for the ones that remain, all force-expanded) so
// the maintainer can see every published setup in its origin structure at a
// glance. Toggled by the "P" Tools button; read by gatherDirsAt + renderTree.
let publishedOnly = false;

const SVG_NS = "http://www.w3.org/2000/svg";
const TOOLBAR_ICONS = {
    loadSnapshot: { kind: "letter", text: "L" },
    saveSnapshot: { kind: "letter", text: "S" },
    compareSnapshot: { kind: "letter", text: "A/B" },
    help: { kind: "letter", text: "H" },
    publishedFilter: { kind: "letter", text: "P" },
    exportStarter: { kind: "letter", text: "E" },
    installMissing: { kind: "letter", text: "I" },
    dropMissing: {
        kind: "svg",
        shapes: [
            ["path", { d: "M10 10 5 5" }],
            ["path", { d: "M5 5v5" }],
            ["path", { d: "M5 5h5" }],
            ["path", { d: "m14 10 5-5" }],
            ["path", { d: "M19 5v5" }],
            ["path", { d: "M19 5h-5" }],
            ["path", { d: "m10 14-5 5" }],
            ["path", { d: "M5 19v-5" }],
            ["path", { d: "M5 19h5" }],
            ["path", { d: "m14 14 5 5" }],
            ["path", { d: "M19 19v-5" }],
            ["path", { d: "M19 19h-5" }],
            ["circle", { cx: "12", cy: "12", r: "1.2" }],
        ],
    },
    repoMode: { kind: "stair" },
    categoryMode: { kind: "list" },
    saveWorkflow: { kind: "square" },
};

// =============================================================================
// Folder expansion state — Map<path, boolean>; truthy = expanded.
// Path keys are auto-prefixed by the engine with the owning section's id, so
// section authors only write segment-relative paths.
//
// `pathStates` is the LIVE panel's state. In Compare mode the snapshot panel
// renders with its OWN `comparePathStates` (swapped in via withComparePathStates
// for the duration of its render) so the two panels don't share keys: renderTree
// prunes the active map to the rendering panel's paths, so without separate maps
// a copy's re-render of one panel would prune (collapse) the other's folders
// (#197). `let` so the active map can be swapped.
let pathStates = new Map();
const comparePathStates = new Map();

// Paths flagged by `pinExpanded` to be force-opened on the next render. The
// set is consumed each render: kept entries are written to pathStates and the
// set is cleared. Used by save flows that mutate state and want the
// destination folder open after the resulting re-render.
const pinnedPaths = new Set();

// Section registry. Sections render in declaration order, separated by
// dividers. Built-in sections register at module load (bottom of this file).
const SECTIONS = [];

// =============================================================================
// Engine — public surface (3 functions)
// =============================================================================

/**
 * @typedef {Object} FolderOpts
 * @property {string} name
 * @property {number} [count]
 * @property {string} [iconKind]                      "favorites" | "workflows"
 *                                                    | "archive" | "folder".
 * @property {string} path                            Segment-relative; engine
 *                                                    prefixes with section.id.
 * @property {boolean} [startExpanded=false]
 * @property {boolean} [forceExpandedWhenFiltered=true]
 * @property {(e: MouseEvent) => void} [onContextMenu]
 * @property {(sub: SectionCtx) => void} build        Populate the sub-folder.
 *
 * @typedef {Object} SectionCtx
 * @property {*} data                                 Result returned by `gather`.
 *                                                    Top-level ctx only; nested
 *                                                    builds close over their
 *                                                    own data via the outer
 *                                                    `build` scope.
 * @property {string} query                           Lowercased+trimmed search.
 * @property {boolean} isFiltered                     True when query is non-empty.
 * @property {(opts: FolderOpts) => void} folder      Append a sub-folder.
 * @property {(opts: { row: HTMLElement }) => void} leaf
 *                                                    Append a leaf row.
 *
 * @typedef {Object} SectionSpec
 * @property {string} id                              Stable; used as the
 *                                                    pathState root for
 *                                                    this section.
 * @property {string} label                           Group folder header.
 * @property {string} [iconKind]                      Same enum as FolderOpts.
 * @property {string} [emptyMessage]                  Shown when the section
 *                                                    gathers nothing AND no
 *                                                    search is active.
 * @property {(query: string) => { total: number }} gather
 *                                                    Returns a result with at
 *                                                    least `total`. Other
 *                                                    fields are opaque to
 *                                                    the engine; the section
 *                                                    reads them via
 *                                                    `ctx.data` in `build`.
 * @property {(ctx: SectionCtx) => void} build        Called when total > 0;
 *                                                    uses `ctx.folder` and
 *                                                    `ctx.leaf` to populate
 *                                                    the section tree.
 */

/**
 * Register a tree section.
 *
 * @param {SectionSpec} spec
 */
function addSection(spec) {
    SECTIONS.push(spec);
}

/**
 * Mark paths as expanded for the next render. The paths must include the
 * section-id prefix (e.g. "workflows", "workflows/MyDir"). Called from save
 * flows so the destination folder is open after the resulting re-render.
 *
 * @param {string[]} paths
 */
function pinExpanded(paths) {
    for (const p of paths) pinnedPaths.add(p);
}

/**
 * Spotlight effect for newly-saved picks: collapse every folder under the
 * Nodes section, then pin the just-added node's pack-folder + subcategory-
 * folder open. Designed as a pedagogical aid — when the user adds a node
 * via the toolbar `+` or the right-click "Add to Kforge Labs", the sidebar
 * snaps to focus on exactly where that node lives in the pack hierarchy,
 * helping newcomers internalize which pack/category each node belongs to.
 *
 * Caller is responsible for triggering a re-render afterwards (typically
 * via `notifyPicksChanged()`); this function only mutates `pathStates` +
 * `pinnedPaths`.
 *
 * Multi-add (caller passes several types): every pack/subcategory hit by
 * the additions is pinned open. So adding 5 nodes from 3 packs lights up
 * all 3 pack folders simultaneously rather than just the last.
 *
 * Idempotent / safe: types not in the LiteGraph registry are silently
 * skipped (no-op). Empty input → no-op (no collapse, no pin).
 *
 * @param {string[]} typeNames
 */
export function spotlightAddedPicks(typeNames) {
    if (!Array.isArray(typeNames) || typeNames.length === 0) return;
    const pathsToExpand = new Set();
    for (const t of typeNames) {
        const loc = findPackPathForType(t);
        if (!loc) continue;
        pathsToExpand.add(`${SECTION_ID_NODES}/${loc.packLabel}`);
        pathsToExpand.add(`${SECTION_ID_NODES}/${loc.packLabel}/${loc.sub}`);
    }
    if (pathsToExpand.size === 0) return;

    // Collapse every existing Nodes-section entry (the section root + every
    // pack/subcategory). The render-time fallback (`startExpanded`) keeps
    // the section header itself open since `addSection` registers it with
    // `startExpanded: true`; pack folders default to closed, which is what
    // we want for everything except the spotlighted location.
    for (const key of [...pathStates.keys()]) {
        if (key === SECTION_ID_NODES || key.startsWith(SECTION_ID_NODES + "/")) {
            pathStates.delete(key);
        }
    }
    pinExpanded([...pathsToExpand]);
}

/**
 * Single render entry point. Idempotent — safe to call from search input,
 * picks-changed, workflows-changed, or storage events.
 *
 * @param {{ treeEl: HTMLElement, query: string }} opts
 */
function renderTree({ treeEl, query }) {
    // Tear down any active hover preview before detaching rows. `innerHTML
    // = ""` removes leaf rows without firing `mouseleave`, so a card that
    // was up at the moment of re-render would otherwise leak — its anchor
    // gone, the card's `pointer-events: none` blocks user dismissal, and
    // it'd persist until the next successful hover. The preview module
    // owns a singleton card; one call clears whatever's live.
    teardownPreview();
    treeEl.innerHTML = "";
    const q = (query || "").trim().toLowerCase();
    const isFiltered = q.length > 0;
    const validPaths = new Set();
    // Track which sections actually rendered this pass. Phase 3 only prunes
    // keys whose section rendered — sections gated empty by a search filter
    // keep their pathStates entries so clearing the filter restores user
    // expansions.
    const renderedSectionIds = new Set();

    // Phase 1: gather every section.
    const gathered = SECTIONS.map(section => ({
        section,
        result: section.gather(q),
    }));

    // Phase 2: render. Cross-section empty under a non-trivial search emits a
    // single placeholder; otherwise iterate sections with dividers between
    // non-empty ones. Phase 3 ALWAYS runs after this, so pins always apply.
    const anyVisible = gathered.some(({ result }) => result.total > 0);
    if (!anyVisible && isFiltered) {
        const empty = document.createElement("div");
        empty.className = "koolook-empty";
        empty.textContent = "No nodes or workflows match your search.";
        treeEl.appendChild(empty);
    } else {
        let appended = 0;
        for (const { section, result } of gathered) {
            if (result.total === 0) {
                // Per-section empty placeholder only when not filtered. Under
                // filter, the cross-section "no matches" message handles it.
                if (!isFiltered && section.emptyMessage) {
                    if (appended > 0) appendDivider(treeEl);
                    const el = document.createElement("div");
                    el.className = "koolook-empty";
                    el.textContent = section.emptyMessage;
                    treeEl.appendChild(el);
                    appended += 1;
                }
                continue;
            }

            if (appended > 0) appendDivider(treeEl);

            renderedSectionIds.add(section.id);
            const sectionPath = section.id;
            validPaths.add(sectionPath);
            // The Published filter force-expands the Workflows section (and its
            // subfolders) so every remaining published setup is visible at a
            // glance — without flipping the section's `isFiltered` flatten
            // behavior or expanding the Nodes/Tags sections.
            const sectionExpand = isFiltered
                || (publishedOnly && section.id === SECTION_ID_WORKFLOWS);
            const sectionFolder = buildFolder({
                name: section.label,
                count: result.total,
                iconKind: section.iconKind,
                startExpanded: true,
                path: sectionPath,
                forceExpanded: sectionExpand,
                // Optional per-section right-click on the section header row.
                // `makeFolderRow` no-ops if undefined, so non-opting sections
                // (Nodes, Tags) keep today's behavior.
                onContextMenu: section.rootContextMenu,
                childrenBuilder: (children) => {
                    const ctx = makeSectionCtx(children, sectionPath, sectionExpand, validPaths);
                    ctx.data = result;
                    ctx.query = q;
                    ctx.isFiltered = isFiltered;
                    section.build(ctx);
                },
            });
            treeEl.appendChild(sectionFolder);
            appended += 1;
        }
    }

    // Phase 3: prune pathStates + apply pins. Always runs so pins never leak
    // across renders. Prune is scoped to keys whose owning section actually
    // rendered — keys belonging to a section that was gated empty by the
    // current filter survive untouched, so the user's expansions return when
    // they clear the filter.
    const pinned = new Set(pinnedPaths);
    pinnedPaths.clear();
    for (const key of [...pathStates.keys()]) {
        const slashIdx = key.indexOf("/");
        const sectionId = slashIdx === -1 ? key : key.slice(0, slashIdx);
        if (!renderedSectionIds.has(sectionId)) continue;
        if (!validPaths.has(key) && !pinned.has(key)) {
            pathStates.delete(key);
        }
    }
    for (const p of pinned) pathStates.set(p, true);
}

// Section ctx — handed to `section.build(ctx)`. Each `ctx.folder({...})` call
// recurses with a fresh sub-ctx whose path prefix is extended, so nested
// folders only need to provide segment-relative paths.
function makeSectionCtx(parentEl, prefix, isFiltered, validPaths) {
    return {
        folder({
            name,
            count,
            iconKind,
            path,
            startExpanded = false,
            forceExpandedWhenFiltered = true,
            onContextMenu,
            build,
            draggablePayload,
            dropTarget,
        }) {
            const fullPath = prefix ? `${prefix}/${path}` : path;
            validPaths.add(fullPath);
            const folder = buildFolder({
                name, count, iconKind, startExpanded,
                path: fullPath,
                forceExpanded: isFiltered,
                forceExpandedWhenFiltered,
                onContextMenu,
                draggablePayload,
                dropTarget,
                childrenBuilder: (children) => {
                    const sub = makeSectionCtx(children, fullPath, isFiltered, validPaths);
                    build(sub);
                },
            });
            parentEl.appendChild(folder);
        },
        leaf({ row }) {
            parentEl.appendChild(row);
        },
    };
}

function appendDivider(treeEl) {
    const d = document.createElement("div");
    d.className = "koolook-tree-divider";
    treeEl.appendChild(d);
}

// =============================================================================
// Drag-and-drop primitives. Workflow leaf rows + directory folder rows are
// draggable; directory folder rows + the synthetic Archive folder accept
// drops. The MIME type "application/x-koolook-row" ensures we only react to
// our own rows (not files / external drags).
//
// Drop semantics dispatched by handleDndDrop:
//   workflow → directory  → moveWorkflow (no-op if same dir)
//   workflow → Archive    → archive (move to dest dir first if cross-dir)
//   directory → directory → moveDirectory (cycle-checked in store)
// =============================================================================
const DND_MIME = "application/x-koolook-row";

function decorateDraggable(row, payload) {
    row.draggable = true;
    row.addEventListener("dragstart", (e) => {
        e.stopPropagation();
        e.dataTransfer.effectAllowed = "move";
        e.dataTransfer.setData(DND_MIME, JSON.stringify(payload));
    });
}

function decorateDropTarget(row, target) {
    row.addEventListener("dragover", (e) => {
        if (!Array.from(e.dataTransfer.types).includes(DND_MIME)) return;
        e.preventDefault();
        e.stopPropagation();
        e.dataTransfer.dropEffect = "move";
        row.classList.add("koolook-drop-target");
    });
    row.addEventListener("dragleave", () => {
        row.classList.remove("koolook-drop-target");
    });
    row.addEventListener("drop", (e) => {
        row.classList.remove("koolook-drop-target");
        if (!Array.from(e.dataTransfer.types).includes(DND_MIME)) return;
        e.preventDefault();
        e.stopPropagation();
        const raw = e.dataTransfer.getData(DND_MIME);
        if (!raw) return;
        let payload;
        try { payload = JSON.parse(raw); }
        catch { return; }
        handleDndDrop(payload, target);
    });
}

function handleDndDrop(payload, target) {
    if (!payload || !target) return;
    if (payload.type === "workflow") {
        const srcPath = payload.path;
        const wfName = payload.name;
        if (target.kind === "dir") {
            // No-op when dropped onto its own directory.
            if (pathsEqual(srcPath, target.path)) return;
            persistMutation({
                mutate: () => moveWorkflow(srcPath, wfName, target.path),
                onSuccess: () => toast(`Moved "${wfName}" to ${target.path.join(" / ")}.`),
                onNoOp: () => toast(`Could not move (name conflict in destination?).`),
            });
            return;
        }
        if (target.kind === "archive") {
            // Drop on Archive folder of dir target.path → archive in that
            // dir. If the workflow lives in a different dir, move it first.
            const sameDir = pathsEqual(srcPath, target.path);
            persistMutation({
                mutate: () => {
                    if (!sameDir) {
                        if (!moveWorkflow(srcPath, wfName, target.path)) return false;
                    }
                    return archiveWorkflow(target.path, wfName);
                },
                onSuccess: () => {
                    const where = sameDir ? "" : ` in ${target.path.join(" / ")}`;
                    toast(`Archived "${wfName}"${where}.`);
                },
                onNoOp: () => toast(`Could not archive (name conflict or workflow missing).`),
            });
            return;
        }
        return;
    }
    if (payload.type === "directory") {
        if (target.kind !== "dir") return; // dirs don't drop onto Archive
        const srcParentPath = payload.parentPath;
        const dirName = payload.name;
        // Same-parent drop is a no-op.
        if (pathsEqual(srcParentPath, target.path)) return;
        // Self-drop (drop a dir onto its own row) is also a no-op. The
        // same-parent guard above misses this for root-level dirs because
        // the dir's own row carries `target.path = [...srcParentPath, name]`,
        // which doesn't equal `srcParentPath`. Without this check the
        // cycle guard in `moveDirectory` would still reject the move, but
        // the user would see a misleading "cycle, name collision, or
        // invalid target" toast for what's just a no-op gesture.
        if (pathsEqual([...srcParentPath, dirName], target.path)) return;
        persistMutation({
            mutate: () => moveDirectory(srcParentPath, dirName, target.path),
            onSuccess: () => {
                const where = target.path.length === 0 ? "(root)" : target.path.join(" / ");
                toast(`Moved directory "${dirName}" into ${where}.`);
            },
            onNoOp: () => toast(`Could not move directory (cycle, name collision, or invalid target).`),
        });
    }
}

// =============================================================================
// Data gathering — nodes
// =============================================================================
function subcategoryFor(category, categoryRoot) {
    if (!category) return "(uncategorized)";
    if (category === categoryRoot) return "(root)";
    if (categoryRoot && category.startsWith(categoryRoot + "/")) {
        return category.slice(categoryRoot.length + 1);
    }
    // Fallback: the node's category neither equals the repo's `categoryRoot`
    // nor lives under it. Reachable only via a logic error — typically a
    // `REPOS` entry whose `categoryRoot` no longer matches the upstream
    // node's actual category prefix (upstream renamed; repo config is
    // stale). Surface the misconfig in the console so it's debuggable
    // instead of producing silently mis-grouped sidebar entries.
    console.warn(
        `[Koolook] subcategoryFor fallback fired: category="${category}" did not match ` +
        `categoryRoot="${categoryRoot}". The repo config may need updating to track an ` +
        `upstream category rename.`
    );
    const parts = category.split("/");
    return parts.length > 1 ? parts.slice(1).join("/") : category;
}

// Given a node ID, compute the (packLabel, sub) pair the gather code would
// place it under in the sidebar. Mirrors the precedence in
// `gatherNodesByRepo` + `gatherUserPickPacks`: registered REPOS first
// (`select="all"` matches by category prefix; `select=Array` matches by
// explicit ID), then the user-picks fallback derives the pack label from
// the first segment of the node's category.
//
// Returns `{packLabel, sub}` on success, `null` if the node isn't in the
// LiteGraph registry (caller should skip silently — the node won't render
// in the sidebar either way). Used by `spotlightAddedPicks` to know which
// folder to expand after a save.
// True if this type would be auto-pulled by a REPOS{select: "all"} entry
// — i.e. its category prefix matches a repo's `categoryRoot`, OR it's
// listed in a `select: [...]` array. Used by the `×` handler to decide
// whether removing-from-picks is sufficient (no — registry-driven re-pull
// would resurface it on the next render) or whether the type also needs to
// be added to the auto-pull hidden list.
function isAutoPulled(typeName) {
    const registry = (typeof LiteGraph !== "undefined" && LiteGraph.registered_node_types) || {};
    const nc = registry[typeName];
    if (!nc) return false;
    const cat = nc.category || "";
    for (const repo of REPOS) {
        if (repo.select === "all") {
            const root = repo.categoryRoot || "";
            if (root && (cat === root || cat.startsWith(root + "/"))) return true;
        } else if (Array.isArray(repo.select) && repo.select.includes(typeName)) {
            return true;
        }
    }
    return false;
}

function findPackPathForType(typeName) {
    const registry = (typeof LiteGraph !== "undefined" && LiteGraph.registered_node_types) || {};
    const nc = registry[typeName];
    if (!nc) return null;
    const cat = (nc && nc.category) || "";

    for (const repo of REPOS) {
        if (repo.select === "all") {
            const root = repo.categoryRoot || "";
            if (root && (cat === root || cat.startsWith(root + "/"))) {
                return { packLabel: repo.label, sub: subcategoryFor(cat, root) };
            }
        } else if (Array.isArray(repo.select)) {
            if (repo.select.includes(typeName)) {
                return { packLabel: repo.label, sub: subcategoryFor(cat, repo.categoryRoot || "") };
            }
        }
    }

    const packLabel = cat.split("/")[0] || "(uncategorized)";
    return { packLabel, sub: subcategoryFor(cat, packLabel) };
}

function matchesQuery(display, type, q) {
    if (!q) return true;
    return display.toLowerCase().includes(q) || type.toLowerCase().includes(q);
}

function gatherNodesByRepo(query) {
    const q = (query || "").trim().toLowerCase();
    const registry = (typeof LiteGraph !== "undefined" && LiteGraph.registered_node_types) || {};
    const hidden = loadAutoPullHidden();
    const out = [];

    for (const repo of REPOS) {
        let candidateIds;
        if (repo.select === "all") {
            const root = repo.categoryRoot || "";
            candidateIds = Object.entries(registry)
                .filter(([type, nc]) => {
                    if (hidden.has(type)) return false;
                    const cat = (nc && nc.category) || "";
                    return root && (cat === root || cat.startsWith(root + "/"));
                })
                .map(([type]) => type);
        } else if (Array.isArray(repo.select)) {
            candidateIds = repo.select.filter(t => registry[t] !== undefined && !hidden.has(t));
        } else {
            candidateIds = [];
        }

        const subcats = new Map();
        let total = 0;
        for (const type of candidateIds) {
            const nc = registry[type];
            const display = (nc && nc.title) || type;
            if (repo.excludePatterns && repo.excludePatterns.some(re => re.test(display))) continue;
            if (!matchesQuery(display, type, q)) continue;

            const sub = subcategoryFor((nc && nc.category) || "", repo.categoryRoot);
            if (!subcats.has(sub)) subcats.set(sub, []);
            subcats.get(sub).push({ type, display });
            total += 1;
        }

        const categories = [...subcats.entries()]
            .map(([name, nodes]) => ({
                name,
                nodes: nodes.sort((a, b) => compareNames(a.display, b.display)),
            }))
            .sort((a, b) => compareNames(a.name, b.name));

        out.push({ label: repo.label, categories, total });
    }
    return out;
}

function gatherUserPickPacks(query) {
    const q = (query || "").trim().toLowerCase();
    const registry = (typeof LiteGraph !== "undefined" && LiteGraph.registered_node_types) || {};
    const picks = loadUserPicks();

    const autoCategoryRoots = new Set(
        REPOS.filter(r => r.select === "all" && r.categoryRoot).map(r => r.categoryRoot)
    );

    const byPack = new Map();
    for (const type of picks) {
        const nc = registry[type];
        if (!nc) continue;
        const cat = nc.category || "";
        const packLabel = cat.split("/")[0] || "(uncategorized)";
        if (autoCategoryRoots.has(packLabel)) continue;

        const display = nc.title || type;
        if (!matchesQuery(display, type, q)) continue;

        const sub = subcategoryFor(cat, packLabel);
        if (!byPack.has(packLabel)) byPack.set(packLabel, new Map());
        const subcatMap = byPack.get(packLabel);
        if (!subcatMap.has(sub)) subcatMap.set(sub, []);
        subcatMap.get(sub).push({ type, display });
    }

    const result = [];
    for (const [packLabel, subcatMap] of byPack.entries()) {
        const categories = [...subcatMap.entries()]
            .map(([name, nodes]) => ({
                name,
                nodes: nodes.sort((a, b) => compareNames(a.display, b.display)),
            }))
            .sort((a, b) => compareNames(a.name, b.name));
        const total = categories.reduce((acc, c) => acc + c.nodes.length, 0);
        result.push({ label: packLabel, categories, total, isUserPicks: true });
    }
    result.sort((a, b) => compareNames(a.label, b.label));
    return result;
}

// =============================================================================
// Data gathering — theme-first mode
//
// Groups every user pick by a single semantic theme — independent of which
// pack the node ships from. Picks-only (no REPOS-driven auto-pulled nodes)
// because the user's mental model is "show me my image-related favorites in
// one place," not "show me every image-related node ComfyUI knows about."
//
// Theme extraction (`extractTheme`):
//   1. Read the node's CATEGORY string from its registered class.
//   2. Look up the source pack via `findPackPathForType` (the same
//      precedence the toolbar `+` button uses for spotlight).
//   3. If the FIRST CATEGORY segment matches the pack label (after
//      canonical-key normalization — case + whitespace + underscore +
//      hyphen folded), strip it. The next segment is the theme.
//   4. Otherwise the first segment is already the theme.
//   5. Canonicalize the theme key for cross-pack merging so
//      `KJNodes/image/...`, `Koolook/Image/...`, and `image/...` all
//      land in the same bucket regardless of casing.
//
// Output shape (flat — no nested folders within a theme):
//   Map<canonicalThemeKey, {
//     displayLabels: Map<originalCasing, count>,   // for label resolution
//     nodes: [{ type, display, isUserPick, unresolved? }],
//   }>
// =============================================================================

// Canonical key for a single category-path segment. Lowercase + strip
// internal whitespace/underscores/hyphens so `style_model`, `StyleModel`,
// and `style model` all collapse to `stylemodel`. Segments are not
// stemmed (singular vs plural keep distinct) — see issue #73 for the
// deliberate "no Levenshtein" tradeoff.
function canonicalSegment(s) {
    return String(s).toLowerCase().replace(/[\s_\-]+/g, "");
}

// Resolves a folder's display label from the count map of original
// casings seen. Picks the most common; ties → first-seen. Map iteration
// is insertion order, which mirrors the gather walk order — stable
// across renders for a given registry state. Empty maps are only valid
// for synthetic buckets where the caller pre-seeds the label.
function pickDisplayLabel(displayCounts) {
    let best = null;
    let bestCount = -1;
    for (const [name, count] of displayCounts) {
        if (count > bestCount) {
            best = name;
            bestCount = count;
        }
    }
    return best;
}

// =============================================================================
// Theme classifier — broad semantic buckets via keyword substring match.
//
// The strict canonical-segment approach (`image` ≠ `images` ≠ `Image-Save`)
// produces too many tiny buckets — "image", "images", "HQ-Image-Save",
// "rgthree/Image Comparer", "upscaling/Upscale Image By" all fragment apart
// even though the user mentally lumps them all under "Image."
//
// This classifier folds anything that mentions an image-related word
// (image / img / pixel / color / upscale / resize / etc.) into a single
// "Image" bucket regardless of which pack or subcategory the node lives
// under. First classifier whose pattern matches the search corpus wins.
//
// Corpus = pack name + full category path + node display title + node ID,
// lower-cased. Searching all four fields catches:
//   • "HQ-Image-Save" (pack name has "image")
//   • "rgthree/Image Comparer" (display title has "image")
//   • "EasyAIPipeline" (type ID has "pipeline")
//
// Keyword choices favor breadth — adjust this list when a future pick
// lands in the wrong bucket. Patterns deeper in the list act as fallbacks
// for picks the broader earlier patterns missed.
// =============================================================================
const THEME_CLASSIFIERS = [
    {
        key: "image",
        label: "Image",
        patterns: [
            /\bimg\b/i, /image/i, /pixel/i,
            /color/i, /\bocio\b/i, /\bexr\b/i, /\bhdr\b/i,
            /upscal/i, /resize/i, /comparer/i, /\btile\b/i,
            /frame/i, /thumbnail/i,
        ],
    },
    {
        key: "video",
        label: "Video",
        patterns: [/video/i, /\bwan\b/i, /hunyuan/i, /cogvideo/i, /\bltx\b/i, /motion/i, /sequence/i],
    },
    {
        key: "mask",
        label: "Mask",
        patterns: [/\bmask/i, /\balpha\b/i, /segment/i, /matte/i, /rmbg/i],
    },
    {
        key: "audio",
        label: "Audio",
        patterns: [/audio/i, /\bwav\b/i, /\bsound\b/i],
    },
    {
        key: "model",
        label: "Model",
        patterns: [
            /model/i, /checkpoint/i, /\blora\b/i, /\bvae\b/i, /\bclip\b/i,
            /controlnet/i, /ipadapter/i, /diffusion/i, /\bunet\b/i,
        ],
    },
    {
        key: "sampler",
        label: "Sampler",
        patterns: [/sampler/i, /scheduler/i, /\bnoise\b/i, /\bsigma\b/i],
    },
    {
        key: "conditioning",
        label: "Conditioning",
        patterns: [/condition/i, /\bembed/i, /tokeniz/i],
    },
    {
        key: "text",
        label: "Text & Prompt",
        patterns: [/\btext\b/i, /prompt/i, /\bstring\b/i, /caption/i],
    },
    {
        key: "math",
        label: "Math & Logic",
        patterns: [
            /\bmath\b/i, /\blogic\b/i, /\bint\b/i, /\bfloat\b/i, /\bbool/i,
            /switch/i, /\bcompare\b/i, /numeric/i,
        ],
    },
    {
        key: "pipeline",
        label: "Pipeline & Batch",
        patterns: [/pipeline/i, /workflow/i, /\bbatch\b/i, /\bcache\b/i],
    },
    {
        key: "io",
        label: "I/O",
        patterns: [/\bload\b/i, /\bsave\b/i, /\bfile\b/i, /\bpath\b/i, /import/i, /export/i],
    },
    {
        key: "camera",
        label: "Camera",
        patterns: [/camera/i, /\blens\b/i, /\bpose\b/i, /\btrack/i],
    },
    {
        key: "utility",
        label: "Utility",
        // `\bget\b` / `\bset\b` are kept short on purpose — they're the
        // last-resort net for trivial getter/setter nodes that didn't hit
        // any earlier classifier. Do NOT generalize them to `/get/` or
        // `/set/` (no boundaries) without re-walking the upstream pattern
        // list — un-anchored variants would fish picks out of node names
        // like "AssetGet…" that should land in their own theme.
        patterns: [/\butil/i, /helper/i, /\btool\b/i, /\bget\b/i, /\bset\b/i, /reroute/i],
    },
];

// Returns `{key, label}` of the first classifier whose patterns match the
// corpus, or `null` if no classifier matched. Walked in order — broader
// upstream classifiers preempt downstream ones. "Image Comparer (rgthree)"
// lands in Image because the corpus contains the word "image", which the
// Image classifier's `/image/i` pattern matches; ordering would also have
// protected it (Math is below Image), but the substring hit comes first.
function classifyTheme(corpus) {
    for (const cls of THEME_CLASSIFIERS) {
        for (const pat of cls.patterns) {
            if (pat.test(corpus)) return { key: cls.key, label: cls.label };
        }
    }
    return null;
}

// Per-pick: classify into one of the broad themes above, falling back to
// the pack-prefix-stripped first CATEGORY segment when no classifier
// matched. Returns one of:
//   { kind: "unresolved" }           — pack not loaded, no registry entry
//   { kind: "uncategorized" }        — pack loaded but CATEGORY empty/missing
//   { kind: "theme", themeRaw, themeCanonical }
//
// The fallback path keeps long-tail picks (a niche pack with no recognizable
// keywords) in their original-segment bucket rather than collapsing every
// unrecognized thing into one "(other)" pile.
function extractTheme(typeName, registry) {
    const nc = registry[typeName];
    if (!nc) return { kind: "unresolved" };
    const cat = nc.category || "";
    const display = nc.title || typeName;
    const loc = findPackPathForType(typeName);
    const packLabel = loc?.packLabel || "";

    // Search corpus combines every signal we have about this node so a
    // keyword in any of them — pack name, category subtree, display title,
    // raw type ID — counts. No `.toLowerCase()` needed: every classifier
    // pattern carries the `/i` flag.
    const corpus = `${packLabel} ${cat} ${display} ${typeName}`;
    const classified = classifyTheme(corpus);
    if (classified) {
        return {
            kind: "theme",
            themeRaw: classified.label,
            themeCanonical: classified.key,
        };
    }

    // Fallback: original pack-prefix-stripped first-segment behavior, so a
    // niche pick from "MyPack/specialFoo/SomeNode" lands in "specialFoo"
    // rather than dumping everything unmatched into "(other)".
    const segs = cat.split("/").map(s => s.trim()).filter(Boolean);
    if (segs.length === 0) return { kind: "uncategorized" };
    let themeIdx = 0;
    if (loc && loc.packLabel && segs.length > 1) {
        if (canonicalSegment(loc.packLabel) === canonicalSegment(segs[0])) {
            themeIdx = 1;
        }
    }
    const themeRaw = segs[themeIdx];
    if (!themeRaw) return { kind: "uncategorized" };
    return {
        kind: "theme",
        themeRaw,
        themeCanonical: canonicalSegment(themeRaw),
    };
}

function gatherNodesByTheme(query) {
    const q = (query || "").trim().toLowerCase();
    const registry = (typeof LiteGraph !== "undefined" && LiteGraph.registered_node_types) || {};
    const userPicks = loadUserPicks();

    // Population mirror of repo mode: auto-pulled REPOS nodes plus user
    // picks for packs that aren't auto-pulled. Without this seeding, theme
    // mode silently drops every node the maintainer has registered as
    // always-on via REPOS{select: "all"} (on a stock install: the entire
    // Koolook pack), even though those same nodes do appear in repo mode.
    // Hidden auto-pulls (×'d by the user) are filtered out so the user's
    // visible-favorites set is consistent across both modes.
    const autoCategoryRoots = new Set(
        REPOS.filter(r => r.select === "all" && r.categoryRoot).map(r => r.categoryRoot)
    );
    const hidden = loadAutoPullHidden();
    const seen = new Set();
    const seeds = [];

    for (const repo of REPOS) {
        if (repo.select === "all") {
            const root = repo.categoryRoot || "";
            if (!root) continue;
            for (const [type, nc] of Object.entries(registry)) {
                if (seen.has(type) || hidden.has(type)) continue;
                const cat = (nc && nc.category) || "";
                if (cat !== root && !cat.startsWith(root + "/")) continue;
                const display = (nc && nc.title) || type;
                if (repo.excludePatterns && repo.excludePatterns.some(re => re.test(display))) continue;
                seen.add(type);
                seeds.push({ type });
            }
        } else if (Array.isArray(repo.select)) {
            for (const type of repo.select) {
                if (seen.has(type) || hidden.has(type) || registry[type] === undefined) continue;
                seen.add(type);
                seeds.push({ type });
            }
        }
    }

    for (const type of userPicks) {
        if (seen.has(type)) continue;
        // Skip picks already covered by an auto-pulled REPO (would double-
        // count with the auto-pull pass above). A type that's been hidden
        // from auto-pull AND explicitly user-picked still gets surfaced
        // here, since the auto-pull pass skipped it.
        const nc = registry[type];
        if (nc && !hidden.has(type)) {
            const packLabel = (nc.category || "").split("/")[0] || "";
            if (autoCategoryRoots.has(packLabel)) continue;
        }
        seen.add(type);
        seeds.push({ type });
    }

    // Map<canonicalThemeKey, { displayLabels: Map<rawLabel, count>, nodes: [...] }>
    const themes = new Map();
    const ensureBucket = (key, seedLabel) => {
        if (!themes.has(key)) {
            themes.set(key, {
                displayLabels: seedLabel ? new Map([[seedLabel, 1]]) : new Map(),
                nodes: [],
            });
        }
        return themes.get(key);
    };

    for (const { type } of seeds) {
        const result = extractTheme(type, registry);

        if (result.kind === "unresolved") {
            // Pack not loaded — surface the pick under (unresolved) so the
            // user can see what they picked even before installing the pack.
            // Display falls back to the bare type since `nc.title` is unreachable.
            if (!matchesQuery(type, type, q)) continue;
            const bucket = ensureBucket("(unresolved)", "(unresolved)");
            bucket.nodes.push({ type, display: type, unresolved: true });
            continue;
        }

        // `nc` is guaranteed non-null here: extractTheme() above already
        // bailed with `kind: "unresolved"` for any type missing from the
        // registry, and we caught that branch before reaching this line.
        const nc = registry[type];
        const display = nc.title || type;
        if (!matchesQuery(display, type, q)) continue;

        if (result.kind === "uncategorized") {
            const bucket = ensureBucket("(uncategorized)", "(uncategorized)");
            bucket.nodes.push({ type, display });
            continue;
        }

        const bucket = ensureBucket(result.themeCanonical);
        bucket.displayLabels.set(
            result.themeRaw,
            (bucket.displayLabels.get(result.themeRaw) || 0) + 1,
        );
        bucket.nodes.push({ type, display });
    }

    return themes;
}

// Total-leaf count across every theme bucket. Drives the section header's
// count badge so the user sees "N picks" regardless of theme distribution.
function countNodesInThemes(themes) {
    let c = 0;
    for (const bucket of themes.values()) c += bucket.nodes.length;
    return c;
}

// =============================================================================
// Group mode — read/write the user's chosen mode for the Nodes section.
// Two values: "repo" (default) and "category". Anything else falls back to
// the default so a stray localStorage value can't lock the panel into a
// broken state.
// =============================================================================
function loadGroupMode() {
    try {
        const v = localStorage.getItem(GROUP_MODE_KEY);
        return v === "category" || v === "repo" ? v : GROUP_MODE_DEFAULT;
    } catch {
        return GROUP_MODE_DEFAULT;
    }
}

function saveGroupMode(mode) {
    if (mode !== "repo" && mode !== "category") return;
    try { localStorage.setItem(GROUP_MODE_KEY, mode); } catch { /* quota / disabled */ }
}

// =============================================================================
// Data gathering — workflows (recursive)
//
// Each output entry has shape:
//   { name, path, active, archived, subdirs }
// where `path` is the full string[] address and `subdirs` is the recursive
// list of child entries with the same shape. Empty subtrees (no matching
// active, archived, or subdirs) are dropped, so a search-narrowed render
// only includes paths that produced at least one visible row.
// =============================================================================
function gatherWorkflows(query) {
    const q = (query || "").trim().toLowerCase();
    const stats = { total: 0 };
    const directories = gatherDirsAt([], q, stats);
    return { directories, total: stats.total };
}

function gatherDirsAt(parentPath, q, stats) {
    const out = [];
    for (const dirName of listDirectoryNames(parentPath)) {
        const dirPath = [...parentPath, dirName];
        const dir = dirOf(dirPath);
        if (!dir) continue;

        const matches = (n) => !q || n.toLowerCase().includes(q) || dirName.toLowerCase().includes(q);

        const allNames = Object.keys(dir.workflows || {});
        const active = [];
        const archived = [];
        for (const n of allNames) {
            if (!matches(n)) continue;
            // Published filter: keep only `published`-tagged workflows, and
            // only their active version (old archived versions stay hidden).
            if (publishedOnly && !workflowHasTag(dirPath, n, PUBLISHED_TAG)) continue;
            if (dir.workflows[n] && dir.workflows[n].archived) {
                if (publishedOnly) continue;
                archived.push(n);
            } else {
                active.push(n);
            }
        }
        active.sort(compareNames);
        archived.sort((a, b) => {
            const aInfo = getArchiveDisplayInfo(dirPath, a);
            const bInfo = getArchiveDisplayInfo(dirPath, b);
            const byTime = bInfo.timestampMs - aInfo.timestampMs;
            return byTime || compareNames(a, b);
        });

        const subdirs = gatherDirsAt(dirPath, q, stats);

        // Under an active search, drop entries that contributed nothing
        // (no matched workflows of their own, no matched descendants) so
        // the filtered tree only shows paths leading to a hit. With NO
        // search, keep every directory that exists — including freshly-
        // created empty subdirs — so the tree mirrors the actual store.
        if ((q || publishedOnly) && active.length === 0 && archived.length === 0 && subdirs.length === 0) continue;

        out.push({ name: dirName, path: dirPath, active, archived, subdirs });
        stats.total += active.length + archived.length;
    }
    return out;
}

// Recursive count of every workflow (active + archived) under a gathered
// directory entry, including all descendants. Used for the dir's header
// count so a parent dir with subdirs but no direct workflows doesn't show
// "0" while clearly hosting things underneath.
function countWorkflowsInGatheredDir(dir) {
    let count = dir.active.length + dir.archived.length;
    for (const sub of dir.subdirs) count += countWorkflowsInGatheredDir(sub);
    return count;
}

// Recursive counts on a raw DirNode (not the gathered shape) for delete-
// confirmation messages. Returns { workflows, subdirs } totals.
function countDescendantsOfRawDir(dir) {
    if (!dir) return { workflows: 0, subdirs: 0 };
    let workflows = Object.keys(dir.workflows || {}).length;
    let subdirs = 0;
    for (const child of Object.values(dir.directories || {})) {
        const sub = countDescendantsOfRawDir(child);
        workflows += sub.workflows;
        subdirs += 1 + sub.subdirs;
    }
    return { workflows, subdirs };
}

// =============================================================================
// Data gathering — tags (DFS walk over the workflow tree).
//
// Each output entry has shape:
//   { name, entries: [{ wfName, path }, ...] }
// `path` is the full directory string[] address of the workflow's home dir.
// Archived workflows are skipped here so the Tags section reflects the
// active set only — their tags are still persisted on the entry, so a
// restore (via the Archive folder's right-click) brings them back into
// the section. Tag grouping is case-sensitive: "AI" and "ai" produce
// separate tag folders (the dedupe in `normalizeDirNode` is also
// case-sensitive). The search filter is case-insensitive substring match
// against tag name OR workflow name — typing a tag narrows to that group,
// typing a workflow name keeps every tag the workflow carries.
// =============================================================================
function gatherTags(query) {
    const q = (query || "").trim().toLowerCase();
    const tagMap = new Map();

    const walk = (parentPath) => {
        for (const dirName of listDirectoryNames(parentPath)) {
            const dirPath = [...parentPath, dirName];
            const dir = dirOf(dirPath);
            if (!dir) continue;
            for (const [wfName, wf] of Object.entries(dir.workflows || {})) {
                if (wf.archived === true) continue;
                const tags = Array.isArray(wf.tags) ? wf.tags : [];
                if (tags.length === 0) continue;
                for (const tag of tags) {
                    if (q && !tag.toLowerCase().includes(q) && !wfName.toLowerCase().includes(q)) continue;
                    if (!tagMap.has(tag)) tagMap.set(tag, []);
                    tagMap.get(tag).push({ wfName, path: dirPath });
                }
            }
            walk(dirPath);
        }
    };
    walk([]);

    const tags = [...tagMap.entries()]
        .map(([name, entries]) => ({
            name,
            entries: entries.sort((a, b) => compareNames(a.wfName, b.wfName)),
        }))
        .sort((a, b) => compareNames(a.name, b.name));
    const total = tags.reduce((acc, t) => acc + t.entries.length, 0);
    return { tags, total };
}

// =============================================================================
// DOM helpers
// =============================================================================

function makeIconElement(icon) {
    if (icon && icon.kind === "letter") {
        const el = document.createElement("span");
        el.className = "koolook-letter-icon";
        el.textContent = icon.text;
        el.setAttribute("aria-hidden", "true");
        return el;
    }
    if (icon && icon.kind === "square") {
        const el = document.createElement("span");
        el.className = "koolook-filled-square-icon";
        el.setAttribute("aria-hidden", "true");
        return el;
    }
    if (icon && icon.kind === "stair") {
        const el = document.createElement("span");
        el.className = "koolook-stair-icon";
        el.setAttribute("aria-hidden", "true");
        for (let i = 0; i < 3; i += 1) {
            el.appendChild(document.createElement("span"));
        }
        return el;
    }
    if (icon && icon.kind === "list") {
        const el = document.createElement("span");
        el.className = "koolook-list-icon";
        el.setAttribute("aria-hidden", "true");
        for (let i = 0; i < 3; i += 1) {
            el.appendChild(document.createElement("span"));
        }
        return el;
    }
    if (icon && icon.kind === "svg") {
        const svg = document.createElementNS(SVG_NS, "svg");
        svg.classList.add("koolook-inline-svg-icon");
        svg.setAttribute("viewBox", "0 0 24 24");
        svg.setAttribute("aria-hidden", "true");
        for (const [tag, attrs] of icon.shapes || []) {
            const shape = document.createElementNS(SVG_NS, tag);
            for (const [key, value] of Object.entries(attrs)) {
                shape.setAttribute(key, value);
            }
            svg.appendChild(shape);
        }
        return svg;
    }
    const el = document.createElement("span");
    el.className = typeof icon === "string" ? icon : (icon?.iconClass || "");
    el.setAttribute("aria-hidden", "true");
    return el;
}

// Toolbar button factory for icon-only action buttons. Icons are passed as
// either PrimeIcon class strings or static local glyph descriptors.
function makeToolbarButton({ iconClass, icon, title, onClick }) {
    const btn = document.createElement("button");
    btn.className = "koolook-add-btn koolook-icon-btn";
    btn.appendChild(makeIconElement(icon || iconClass));
    btn.title = title;
    btn.setAttribute("aria-label", title);
    btn.addEventListener("click", onClick);
    return btn;
}

function makeFolderRow({ name, count, iconKind, onToggle, onContextMenu, draggablePayload, dropTarget }) {
    const row = document.createElement("div");
    row.className = "koolook-row";

    const chevron = document.createElement("span");
    chevron.className = "koolook-chevron";
    chevron.textContent = "▾";
    row.appendChild(chevron);

    const icon = document.createElement("span");
    if (iconKind === "favorites") {
        icon.className = "pi pi-star koolook-pin-icon";
    } else if (iconKind === "workflows") {
        icon.className = "pi pi-th-large koolook-workflows-icon";
    } else if (iconKind === "archive") {
        icon.className = "pi pi-box koolook-archive-icon";
    } else {
        icon.className = "pi pi-folder koolook-folder-icon";
    }
    row.appendChild(icon);

    const nameEl = document.createElement("span");
    nameEl.className = "koolook-name";
    nameEl.textContent = name;
    row.appendChild(nameEl);

    if (count != null) {
        const cnt = document.createElement("span");
        cnt.className = "koolook-count";
        cnt.textContent = String(count);
        row.appendChild(cnt);
    }

    row.addEventListener("click", onToggle);
    if (onContextMenu) row.addEventListener("contextmenu", onContextMenu);
    if (draggablePayload) decorateDraggable(row, draggablePayload);
    if (dropTarget) decorateDropTarget(row, dropTarget);
    return { row, chevron };
}

function makeNodeLeafRow({ display, type, removable, onClick, unresolved, breadcrumb, packBadge }) {
    const row = document.createElement("div");
    row.className = "koolook-row koolook-leaf";
    if (unresolved) row.classList.add("koolook-leaf-unresolved");
    // Stable identity for Compare-mode tinting (#181). Invisible otherwise.
    if (type) row.dataset.koolookNodeType = type;
    // Breadcrumb-equipped rows under search-flatten mode also surface the
    // origin path in the row tooltip (`type` is still appended) so a hover
    // confirms exactly which folder the leaf would live under in the tree.
    row.title = breadcrumb ? `${breadcrumb} › ${type}` : type;

    const chevron = document.createElement("span");
    chevron.className = "koolook-chevron";
    row.appendChild(chevron);

    const dot = document.createElement("span");
    dot.className = "koolook-leaf-dot";
    row.appendChild(dot);

    // The name cell holds an optional dim-grey breadcrumb prefix (set under
    // search-flatten mode) followed by the node's display name. We avoid
    // innerHTML and build text nodes instead — display strings come from
    // `nc.title` and breadcrumbs from category labels, both of which can in
    // principle contain user-controlled HTML if a custom-node author
    // included markup in `CATEGORY` or class attributes.
    const nameEl = document.createElement("span");
    nameEl.className = "koolook-name";
    if (breadcrumb) {
        const crumb = document.createElement("span");
        crumb.className = "koolook-leaf-crumb";
        crumb.textContent = `${breadcrumb} › `;
        nameEl.appendChild(crumb);
        nameEl.appendChild(document.createTextNode(display));
    } else {
        nameEl.textContent = display;
    }
    row.appendChild(nameEl);

    // Right-side pack badge — used in theme mode as a quiet "where did
    // this come from" memory aid. Repo mode and search-flatten skip it
    // (origin is already conveyed by tree nesting / breadcrumb prefix).
    if (packBadge) {
        const badge = document.createElement("span");
        badge.className = "koolook-pack-badge";
        badge.textContent = packBadge;
        row.appendChild(badge);
    }

    if (removable) {
        const rm = document.createElement("span");
        rm.className = "koolook-remove";
        rm.textContent = "×";
        rm.title = "Remove from favorites";
        rm.addEventListener("click", (e) => {
            e.stopPropagation();
            // Two paths a row can land in favorites: explicit user pick
            // (drop it from the picks list) or REPOS{select: "all"} auto-
            // pull (add it to the auto-pull hidden set so the next render
            // doesn't re-pull it). A type can in principle be both at
            // once — running both ops is idempotent and covers the union.
            removeFromMyPicks(type);
            if (isAutoPulled(type)) hideAutoPullType(type);
            notifyPicksChanged();
        });
        row.appendChild(rm);
    }

    row.addEventListener("click", onClick);
    // Hover preview — every leaf gets one. The card looks up the live
    // node class on hover (lazy), so leaves whose pack isn't loaded
    // still get a "Pack not loaded" stub instead of silently no-oping.
    attachHoverPreview(row, type);
    return row;
}

function makeWorkflowLeafRow({
    name,
    dirName,
    wfPath,
    onClick,
    onContextMenu,
    draggablePayload,
    isModule = false,
    isPublished = false,
    secondaryText = "",
}) {
    const row = document.createElement("div");
    row.className = "koolook-row koolook-leaf";
    // Stable identity for Compare-mode tinting (#181). Invisible otherwise.
    if (wfPath) row.dataset.koolookWfPath = wfPath;
    // Module-tagged entries get a distinct hover tooltip so the green icon
    // isn't the only signal that a left-click does something different. The
    // `pi pi-plus-circle` class swap is what actually makes them look like
    // "drop in" affordances rather than "open" affordances.
    const titleSuffix = secondaryText ? ` — ${secondaryText}` : "";
    row.title = isModule
        ? `${dirName} / ${name}${titleSuffix} — module (left-click to insert into canvas)`
        : `${dirName} / ${name}${titleSuffix}`;

    const chevron = document.createElement("span");
    chevron.className = "koolook-chevron";
    row.appendChild(chevron);

    const icon = document.createElement("span");
    icon.className = isModule
        ? "pi pi-plus-circle koolook-module-icon"
        : "pi pi-file koolook-leaf-icon";
    row.appendChild(icon);

    if (secondaryText) {
        const stack = document.createElement("span");
        stack.className = "koolook-name-stack";
        const nameEl = document.createElement("span");
        nameEl.className = "koolook-name";
        nameEl.textContent = name;
        stack.appendChild(nameEl);
        const metaEl = document.createElement("span");
        metaEl.className = "koolook-row-meta";
        metaEl.textContent = secondaryText;
        stack.appendChild(metaEl);
        row.appendChild(stack);
    } else {
        const nameEl = document.createElement("span");
        nameEl.className = "koolook-name";
        nameEl.textContent = name;
        row.appendChild(nameEl);
    }

    // Quiet "this workflow is published as a setup" marker (issue #227). Driven
    // by the `published` tag so it survives reloads and matches the Tools "P"
    // filter + the Tags-section pool.
    if (isPublished) {
        const badge = document.createElement("span");
        badge.className = "koolook-published-badge";
        badge.textContent = "published";
        badge.title = "Published as a callable setup";
        row.appendChild(badge);
    }

    row.addEventListener("click", onClick);
    if (onContextMenu) row.addEventListener("contextmenu", onContextMenu);
    if (draggablePayload) decorateDraggable(row, draggablePayload);
    return row;
}

// Resolve module-ness from the workflow's stored tags. Computed at render
// time (cheap — small array `.includes` per row) so we don't have to widen
// the gather pipeline's row shape just to carry one boolean. Returns false
// for archived entries: archived workflows are old versions; clicking them
// in the Archive folder should still mean "load to review", not "splice an
// outdated cluster into my live canvas". The right-click menu on archived
// rows still exposes both Insert and Load if the user really wants to
// insert an archived version.
function isModuleWorkflow(dirPath, wfName) {
    return isWorkflowModule(dirPath, wfName);
}

function buildFolder({
    name,
    count,
    iconKind,
    childrenBuilder,
    onContextMenu,
    startExpanded = true,
    path,
    forceExpanded = false,
    forceExpandedWhenFiltered = true,
    draggablePayload,
    dropTarget,
}) {
    // `path` is required — every section/sub-section calling site routes
    // through `makeSectionCtx`, which always supplies a non-empty
    // section-prefixed string. The assertion below converts a "future
    // caller forgot to pass path" regression into a loud failure at the
    // boundary; without it, a stray `undefined` would silently land in
    // `pathStates.set(undefined, …)` and pollute one shared key across
    // every misconfigured folder. The pathStates branch further down
    // assumes a string key.
    if (typeof path !== "string" || !path) {
        throw new Error("buildFolder: `path` must be a non-empty string");
    }

    // Bind the active expansion map at BUILD time. In Compare mode the snapshot
    // panel renders under `comparePathStates` (swapped in by withComparePathStates),
    // but `onToggle` fires later — at click time, after the swap has restored the
    // live map. Capturing the map here means a toggle writes back to the same map
    // the folder was rendered from, so the two panels' expansion never crosses
    // (#197). Reads below use it too, for symmetry.
    const stateMap = pathStates;

    // Resolution order:
    //   1. forceExpanded (e.g. search active) opens regular folders, but not
    //      Archive folders. A crowded Archive should stay summarized under
    //      search unless the user has explicitly opened or pinned it.
    //   2. pinnedPaths (a save/spotlight flow has flagged this for force-open
    //      on the current render) — Phase 3 writes pins into pathStates AFTER
    //      Phase 2 builds DOM, so without a direct pinnedPaths read here the
    //      pin would only take effect on the *next* render. The spotlight
    //      effect for newly-added picks depends on pinned paths expanding
    //      on the immediate render.
    //   3. pathStates (user has previously toggled this folder)
    //   4. startExpanded (the natural default for this folder)
    const initiallyExpanded = resolveFolderExpanded({
        forceExpanded,
        forceExpandedWhenFiltered,
        iconKind,
        isPinned: pinnedPaths.has(path),
        hasStoredState: stateMap.has(path),
        storedState: stateMap.get(path),
        startExpanded,
    });

    // Track the live expanded state in a closure variable instead of
    // round-tripping through `wrapper.dataset.expanded`. The DOM dataset
    // forces every value to a string, which led to the slightly awkward
    // `!== "false"` read; closure-locality keeps the toggle a plain boolean
    // and removes one source of truth that wasn't the canonical one
    // (`pathStates` is the canonical store; the DOM dataset just mirrored
    // it for reads).
    let isExpanded = initiallyExpanded;
    const wrapper = document.createElement("div");

    const children = document.createElement("div");
    children.className = "koolook-children";
    if (!isExpanded) children.style.display = "none";

    const { row, chevron } = makeFolderRow({
        name,
        count,
        iconKind,
        onContextMenu,
        draggablePayload,
        dropTarget,
        onToggle: () => {
            isExpanded = !isExpanded;
            chevron.textContent = isExpanded ? "▾" : "▸";
            children.style.display = isExpanded ? "" : "none";
            stateMap.set(path, isExpanded);
        },
    });
    if (!initiallyExpanded) chevron.textContent = "▸";

    // Stable identity for the Compare-mode folder pull-in (#197): the read-only
    // guard reads this to offer "Copy folder … (with contents)" on workflow
    // folders. Invisible otherwise. The tree path carries the section prefix,
    // so the handler can tell a workflows folder from a node/tag folder.
    row.dataset.koolookFolderPath = path;

    wrapper.appendChild(row);
    wrapper.appendChild(children);
    childrenBuilder(children);
    return wrapper;
}

// =============================================================================
// Context-menu wiring for workflow rows
// =============================================================================
function workflowRowContextMenu(event, dirPath, wfName, isArchived = false) {
    // "+ New directory…" / "+ New subdirectory under …" both create a fresh
    // directory and move the workflow into it as one atomic mutation. If
    // the move couldn't land we manually undo the dir add so we don't leak
    // an empty orphan; in practice that branch is unreachable (the new dir
    // is empty so the move can't collide), but the explicit cleanup keeps a
    // future regression from silently leaving stray directories behind.
    function moveToNewDirAction(parentPath, parentLabel) {
        showInputModal({
            title: parentLabel
                ? `New subdirectory under "${parentLabel}"`
                : "New top-level directory",
            label: "Name",
            placeholder: "e.g. drafts",
            confirmLabel: "Create & Move",
            onSubmit: (name) => persistMutation({
                mutate: () => {
                    if (!addDirectory(parentPath, name)) return false;
                    const target = [...parentPath, name];
                    if (!moveWorkflow(dirPath, wfName, target)) {
                        deleteDirectory(parentPath, name);
                        return false;
                    }
                    return target;
                },
                onSuccess: (target) => toast(`Moved "${wfName}" to ${target.join(" / ")}.`),
                onNoOp: () => toast(`Could not create — name in use, empty, or "Archive" reserved.`),
            }),
        });
    }

    const newDirItem = {
        label: "+ New directory…",
        action: () => moveToNewDirAction([], null),
    };
    const newSubdirItem = {
        label: `+ New subdirectory under "${dirPath.join(" / ")}"…`,
        action: () => moveToNewDirAction(dirPath, dirPath.join(" / ")),
    };

    const archiveItem = isArchived
        ? {
            label: "Restore from archive",
            action: () => persistMutation({
                mutate: () => unarchiveWorkflow(dirPath, wfName),
                onSuccess: () => toast(`Restored "${wfName}".`),
            }),
        }
        : {
            label: "Move to archive",
            action: () => persistMutation({
                mutate: () => archiveWorkflow(dirPath, wfName),
                onSuccess: () => toast(`Archived "${wfName}".`),
            }),
        };

    const duplicateItem = {
        label: "Duplicate…",
        action: () => {
            const sourceGraph = getWorkflowGraph(dirPath, wfName);
            if (!sourceGraph) {
                toast("Could not duplicate — workflow not found.");
                return;
            }
            // Capture tags at modal-open time so a same-name duplicate (which
            // archives the original via `saveWorkflowEntry`) still inherits
            // the source's categorization onto the new active entry.
            const sourceTags = getWorkflowTags(dirPath, wfName) || [];
            const sourceIsModule = isWorkflowModule(dirPath, wfName);
            showInputModal({
                title: "Duplicate workflow",
                label: "New name",
                defaultValue: `${wfName} (copy)`,
                confirmLabel: "Duplicate",
                onSubmit: (newName) => persistMutation({
                    mutate: () => {
                        // Re-validate at submit-time. A concurrent action
                        // (another tab, drag-and-drop) could have deleted
                        // the source between menu-open and submit. Without
                        // this guard, `saveWorkflowEntry` would call
                        // `ensureDirectoryAtPath` and silently re-create
                        // the parent directory with a clone of the
                        // captured graph — effectively undoing someone
                        // else's delete with no feedback.
                        if (getWorkflowGraph(dirPath, wfName) === null) return false;
                        const cloned = JSON.parse(JSON.stringify(sourceGraph));
                        const result = saveWorkflowEntry(dirPath, newName, cloned, { module: sourceIsModule });
                        if (!result) return false;
                        // Route tag inheritance through the public `addTag`
                        // mutator instead of writing `wf.tags` directly, so
                        // the Duplicate path stays inside the documented
                        // store API. The whole sequence rides on the same
                        // persistMutation snapshot — commit failure rolls
                        // back the save AND the tag adds together.
                        for (const t of sourceTags) addTag(dirPath, newName, t);
                        if (sourceIsModule) addTag(dirPath, newName, MODULE_TAG);
                        return result;
                    },
                    onSuccess: (result) => {
                        if (result && result.archivedAs) {
                            toast(`Duplicated to "${newName}" — previous "${newName}" archived as "${result.archivedAs}".`);
                        } else {
                            toast(`Duplicated to "${newName}".`);
                        }
                    },
                    onNoOp: () => toast(`Could not duplicate — "${wfName}" no longer exists.`),
                }),
            });
        },
    };

    const updateFromCanvasItem = {
        label: "Update from selection or canvas",
        action: () => {
            if (!canvasIsNonEmpty()) {
                toast("Canvas is empty.");
                return;
            }

            const selectedCount = getSelectedNodeCount();
            const totalNodeCount = getCanvasNodeCount();
            const allNodesSelected = selectedCount > 0 && selectedCount === totalNodeCount;

            let graph = null;
            let sourceLabel = "canvas";

            if (selectedCount > 0 && !allNodesSelected) {
                const selectionResult = serializeSelection();
                if (selectionResult.kind === "stale") {
                    toast("Selected node(s) no longer exist.");
                    return;
                }
                if (selectionResult.kind !== "ok") {
                    toast("Selection unavailable. Re-select nodes and try again.");
                    return;
                }
                if (!selectionResult.graph || !Array.isArray(selectionResult.graph.nodes) || selectionResult.graph.nodes.length === 0) {
                    toast("Failed to serialize selection. See console.");
                    return;
                }
                graph = selectionResult.graph;
                sourceLabel = "selection";
            } else {
                graph = serializeFullCanvas();
                if (!graph || !Array.isArray(graph.nodes) || graph.nodes.length === 0) {
                    toast("Failed to serialize canvas. See console.");
                    return;
                }
            }

            const sourceTags = getWorkflowTags(dirPath, wfName) || [];
            const sourceIsModule = isWorkflowModule(dirPath, wfName);
            persistMutation({
                mutate: () => {
                    if (getWorkflowGraph(dirPath, wfName) === null) return false;
                    const result = saveWorkflowEntry(dirPath, wfName, graph, { module: sourceIsModule });
                    if (!result) return false;
                    for (const t of sourceTags) addTag(dirPath, wfName, t);
                    if (sourceIsModule) addTag(dirPath, wfName, MODULE_TAG);
                    return result;
                },
                onSuccess: (result) => {
                    if (result && result.archivedAs) {
                        toast(`Updated "${wfName}" from ${sourceLabel} (previous version archived as "${result.archivedAs}").`);
                    } else {
                        toast(`Updated "${wfName}" from ${sourceLabel}.`);
                    }
                },
                onNoOp: () => toast(`Could not update — "${wfName}" no longer exists.`),
            });
        },
    };

    const tagsItem = {
        label: "Tags…",
        action: () => {
            showTagsModal({
                wfName,
                // Pass the raw `null` through so the modal can render an
                // explicit gone-state when the workflow is deleted/moved/
                // renamed by a concurrent action. Collapsing to `[]` would
                // silently morph "workflow gone" into "no tags yet" and
                // accept doomed Add inputs.
                getCurrentTags: () => getWorkflowTags(dirPath, wfName),
                onAddTag: (tag, onDone) => persistMutation({
                    mutate: () => addTag(dirPath, wfName, tag),
                    onSuccess: () => { onDone(); toast(`Tagged "${wfName}" with "${tag}".`); },
                    onNoOp: () => toast(`Could not add — empty or already tagged.`),
                }),
                onRemoveTag: (tag, onDone) => persistMutation({
                    mutate: () => removeTag(dirPath, wfName, tag),
                    onSuccess: () => { onDone(); toast(`Removed tag "${tag}" from "${wfName}".`); },
                    onNoOp: () => toast(`Tag "${tag}" was not present.`),
                }),
            });
        },
    };

    const publishSetupItem = {
        label: "Publish setup…",
        action: () => {
            const visualGraph = getWorkflowGraph(dirPath, wfName);
            showPublishSetupModal({
                wfName,
                dirPath,
                currentTags: getWorkflowTags(dirPath, wfName) || [],
                visualGraph,
                revealPublishedSetupFolder,
                // Return the publish result so the modal can render the success
                // card (where it saved + Open folder / Copy path). The card is
                // the user-facing confirmation now, replacing the old toast.
                onPublish: async ({ metadata, inputContract, outputContract }) => {
                    const result = await publishSavedWorkflowSetup({
                        dirPath,
                        wfName,
                        visualGraph,
                        captureApiPrompt: captureWorkflowApiPrompt,
                        metadata,
                        inputContract,
                        outputContract,
                    });
                    // Mark the source workflow published so it carries the
                    // badge, joins the Tags "published" pool, and surfaces under
                    // the Tools "P" filter. Awaited so the success card reflects
                    // a committed tag; a persist failure surfaces through
                    // persistMutation's own critical toast. addTag no-ops if the
                    // tag is already present (e.g. re-publishing an update).
                    await persistMutation({
                        mutate: () => addTag(dirPath, wfName, PUBLISHED_TAG),
                        onSuccess: () => {},
                        onNoOp: () => {
                            // No-op means already-tagged (republish — fine) OR
                            // the source workflow vanished mid-publish. Only the
                            // latter leaves it untagged, so warn just for that:
                            // the setup published, but won't be discoverable.
                            if (!workflowHasTag(dirPath, wfName, PUBLISHED_TAG)) {
                                toast(`Published, but couldn't tag "${wfName}" as published — it may have moved.`);
                            }
                        },
                    });
                    return result;
                },
            });
        },
    };

    showContextMenu(event, [
        {
            label: "Load",
            action: () => loadWorkflowOntoCanvas(dirPath, wfName),
        },
        {
            // Non-destructive sibling of Load — splices the saved cluster into
            // whatever's already on canvas (placed at the viewport center,
            // inserted nodes selected so the user can immediately drag).
            // Aborts cleanly if any referenced node type isn't installed.
            label: "Insert into canvas",
            action: () => insertWorkflowOntoCanvas(dirPath, wfName),
        },
        ...(!isArchived ? [updateFromCanvasItem] : []),
        {
            label: "Rename…",
            action: () => {
                showInputModal({
                    title: "Rename workflow",
                    label: "New name",
                    defaultValue: wfName,
                    confirmLabel: "Rename",
                    onSubmit: (newName) => persistMutation({
                        mutate: () => renameWorkflow(dirPath, wfName, newName),
                        onSuccess: () => toast(`Renamed to "${newName}".`),
                        onNoOp: () => toast(`Rename failed (name in use?).`),
                    }),
                });
            },
        },
        duplicateItem,
        tagsItem,
        ...(!isArchived ? [publishSetupItem] : []),
        archiveItem,
        // New-folder shortcuts — existing-folder moves stay on drag-and-drop
        // so large libraries don't make this context menu taller than the
        // viewport.
        null,
        newDirItem,
        newSubdirItem,
        null,
        {
            label: "Delete",
            danger: true,
            action: () => {
                showConfirmModal({
                    title: "Delete workflow?",
                    message: `"${wfName}" will be removed. This cannot be undone.`,
                    confirmLabel: "Delete",
                    danger: true,
                    onConfirm: () => persistMutation({
                        mutate: () => deleteWorkflow(dirPath, wfName),
                        onSuccess: () => toast(`Deleted "${wfName}".`),
                    }),
                });
            },
        },
    ]);
}

// Right-click on the synthetic Archive folder. The Archive folder isn't a
// real DirNode — it's rendered for any dir with `archived: true` workflows
// at this level. Bulk cleanup keeps representative recent entries; the
// destructive all-delete escape hatch remains available below it.
function archiveFolderContextMenu(event, dirPath, archivedCount) {
    const dirDisplay = dirPath.join(" / ");
    const noun = `${archivedCount} archived workflow${archivedCount === 1 ? "" : "s"}`;
    const cleanupPlan = getArchiveCleanupPlan(dirPath);
    showContextMenu(event, [
        {
            label: "Clean up archive",
            action: () => {
                if (!cleanupPlan || cleanupPlan.deleteCount === 0) {
                    toast(`Archive in "${dirDisplay}" already looks tidy.`);
                    return;
                }
                showConfirmModal({
                    title: "Clean up archive?",
                    message: archiveCleanupConfirmMessage(cleanupPlan),
                    confirmLabel: "Clean up archive",
                    danger: true,
                    onConfirm: () => persistMutation({
                        mutate: () => cleanUpArchive(dirPath, cleanupPlan),
                        onSuccess: (result) => toast(
                            `Cleaned archive in "${dirDisplay}": kept ${result.keepCount}, deleted ${result.deleteCount}.`
                        ),
                        onNoOp: () => toast(`Archive in "${dirDisplay}" already looks tidy.`),
                    }),
                });
            },
        },
        {
            label: `Delete archive (${archivedCount})`,
            danger: true,
            action: () => {
                showConfirmModal({
                    title: "Delete archived workflows?",
                    message: `${noun} in "${dirDisplay}" will be permanently deleted. Active workflows in this directory are not affected.`,
                    confirmLabel: "Delete archive",
                    danger: true,
                    onConfirm: () => persistMutation({
                        mutate: () => clearArchive(dirPath),
                        onSuccess: (result) => toast(
                            `Deleted ${result.count} archived workflow${result.count === 1 ? "" : "s"} in "${dirDisplay}".`
                        ),
                    }),
                });
            },
        },
    ]);
}

function archiveCleanupConfirmMessage(cleanupPlan) {
    const list = document.createElement("ul");
    list.className = "koolook-confirm-list";

    const items = [
        "Clean up this Archive folder.",
        "Keep latest from 5 minutes, 1 hour, and 1 day.",
        "Apply separately to each setup name.",
        `Delete ${cleanupPlan.deleteCount} older duplicate${cleanupPlan.deleteCount === 1 ? "" : "s"}.`,
        "Active workflows stay untouched.",
    ];

    for (const text of items) {
        const item = document.createElement("li");
        item.textContent = text;
        list.appendChild(item);
    }

    return list;
}

// Right-click on the "Workflows" section header — the row labeled "Workflows"
// at the top of the Workflows tree. Hosts top-level directory creation, which
// used to live as a 📂 toolbar button in Row 3 alongside the save buttons.
// Moved here so the Workflows action bar contains only save actions and tree-
// structure operations live where tree-structure operations already live —
// on right-click of the row representing the structure being mutated. Mirrors
// the per-folder right-click menu's "Create subdirectory…" pattern, just one
// level up.
function workflowsRootContextMenu(event) {
    showContextMenu(event, [
        {
            label: "Create directory…",
            action: () => {
                showInputModal({
                    title: "Create directory",
                    label: "Directory name",
                    placeholder: "e.g. Inpainting",
                    confirmLabel: "Create",
                    onSubmit: (name) => persistMutation({
                        // Top-level directory creation. Subdirectories are
                        // created via right-click → "Create subdirectory…"
                        // on an existing folder row.
                        mutate: () => addDirectory([], name),
                        onSuccess: () => toast(`Directory "${name}" created.`),
                        onNoOp: () => toast(`Directory "${name}" already exists.`),
                    }),
                });
            },
        },
    ]);
}

function directoryRowContextMenu(event, dirPath) {
    const dir = dirOf(dirPath);
    const dirName = dirPath[dirPath.length - 1];
    const parentPath = dirPath.slice(0, -1);
    const displayPath = dirPath.join(" / ");
    const counts = countDescendantsOfRawDir(dir);
    const isEmpty = counts.workflows === 0 && counts.subdirs === 0;

    showContextMenu(event, [
        {
            label: "Create subdirectory…",
            action: () => {
                showInputModal({
                    title: `Create subdirectory under "${displayPath}"`,
                    label: "Name",
                    placeholder: "e.g. Type-A",
                    confirmLabel: "Create",
                    onSubmit: (name) => persistMutation({
                        mutate: () => addDirectory(dirPath, name),
                        onSuccess: () => toast(`Created "${name}" in ${displayPath}.`),
                        onNoOp: () => toast(`Could not create — name in use, empty, or "Archive" reserved.`),
                    }),
                });
            },
        },
        {
            label: "Rename directory…",
            action: () => {
                showInputModal({
                    title: "Rename directory",
                    label: "New name",
                    defaultValue: dirName,
                    confirmLabel: "Rename",
                    onSubmit: (newName) => persistMutation({
                        mutate: () => renameDirectory(parentPath, dirName, newName),
                        onSuccess: () => toast(`Renamed to "${newName}".`),
                        onNoOp: () => toast(`Rename failed — name in use or "Archive" reserved.`),
                    }),
                });
            },
        },
        null,
        {
            label: "Delete directory",
            danger: true,
            action: () => {
                if (isEmpty) {
                    showConfirmModal({
                        title: "Delete empty directory?",
                        message: `"${displayPath}" will be removed.`,
                        confirmLabel: "Delete",
                        danger: true,
                        onConfirm: () => persistMutation({
                            mutate: () => deleteDirectory(parentPath, dirName),
                            onSuccess: () => toast(`Deleted directory "${displayPath}".`),
                        }),
                    });
                } else {
                    const parts = [];
                    if (counts.workflows > 0) parts.push(`${counts.workflows} workflow${counts.workflows === 1 ? "" : "s"}`);
                    if (counts.subdirs > 0) parts.push(`${counts.subdirs} subdirector${counts.subdirs === 1 ? "y" : "ies"}`);
                    showConfirmModal({
                        title: "Delete non-empty directory?",
                        message: `"${displayPath}" contains ${parts.join(" and ")}. They will be permanently deleted.`,
                        confirmLabel: "Delete all",
                        danger: true,
                        onConfirm: () => persistMutation({
                            mutate: () => deleteDirectory(parentPath, dirName),
                            onSuccess: () => toast(`Deleted "${displayPath}" and its contents.`),
                        }),
                    });
                }
            },
        },
    ]);
}

// =============================================================================
// Built-in section descriptors. Order here = render order in the panel.
// =============================================================================
addSection({
    id: SECTION_ID_NODES,
    label: ROOT_GROUP_LABEL,
    iconKind: "favorites",
    emptyMessage: "No curated nodes yet. Click + above (with a canvas node selected) or right-click a node on the canvas → Add to Kforge Labs.",
    gather(q) {
        const mode = loadGroupMode();
        if (mode === "category") {
            const themes = gatherNodesByTheme(q);
            return { mode, themes, total: countNodesInThemes(themes) };
        }
        const auto = gatherNodesByRepo(q);
        const user = gatherUserPickPacks(q);
        const packs = [...auto, ...user]
            .filter(p => p.total > 0)
            .sort((a, b) => compareNames(a.label, b.label));
        const total = packs.reduce((acc, p) => acc + p.total, 0);
        return { mode: "repo", packs, total };
    },
    build(ctx) {
        // Search-flatten branch: under any non-empty query the Nodes section
        // collapses to a flat list of matching leaves with breadcrumb
        // prefixes, regardless of group mode. The tree's spatial signal is
        // already mostly lost once a query has narrowed the set, so a flat
        // sorted list with breadcrumb prefixes scans faster than a forest
        // of forced-open folder spines. Workflows / Tags sections retain
        // their existing tree-under-filter behavior.
        if (ctx.isFiltered) {
            emitNodesFlatSearchResults(ctx);
            return;
        }
        if (ctx.data.mode === "category") {
            emitThemeChildren(ctx, ctx.data.themes);
            return;
        }
        for (const pack of ctx.data.packs) {
            ctx.folder({
                name: pack.label,
                count: pack.total,
                path: pack.label,
                build: (packCtx) => {
                    for (const cat of pack.categories) {
                        packCtx.folder({
                            name: cat.name,
                            count: cat.nodes.length,
                            path: cat.name,
                            build: (catCtx) => {
                                for (const n of cat.nodes) {
                                    catCtx.leaf({
                                        row: makeNodeLeafRow({
                                            display: n.display,
                                            type: n.type,
                                            removable: true,
                                            onClick: () => insertNode(n.type),
                                        }),
                                    });
                                }
                            },
                        });
                    }
                },
            });
        }
    },
});

// Flat-list emitters for the Nodes section under search. Both group modes
// produce the same `{ display, type, breadcrumb, removable, unresolved? }`
// shape so the leaf factory call is uniform downstream. Sorted by display
// name (case-insensitive); breadcrumb is a `›`-joined path of the folder
// labels the leaf would live under in the un-filtered tree, so the user
// retains the spatial-origin signal.

function emitNodesFlatSearchResults(ctx) {
    const items = [];
    if (ctx.data.mode === "category") {
        collectFlatFromThemes(ctx.data.themes, items);
    } else {
        collectFlatFromRepoMode(ctx.data.packs, items);
    }
    items.sort((a, b) => compareNames(a.display, b.display));
    for (const item of items) {
        ctx.leaf({
            row: makeNodeLeafRow({
                display: item.display,
                type: item.type,
                breadcrumb: item.breadcrumb,
                unresolved: !!item.unresolved,
                removable: true,
                onClick: () => insertNode(item.type),
            }),
        });
    }
}

function collectFlatFromThemes(themes, out) {
    for (const bucket of themes.values()) {
        // Theme label = the most common original casing seen across the
        // picks that landed in this bucket. Falls back to the canonical key
        // for synthetic buckets where `displayLabels` was pre-seeded with
        // the bucket name itself.
        const label = pickDisplayLabel(bucket.displayLabels);
        for (const n of bucket.nodes) {
            out.push({
                display: n.display,
                type: n.type,
                unresolved: !!n.unresolved,
                removable: !!n.isUserPick,
                breadcrumb: label || null,
            });
        }
    }
}

function collectFlatFromRepoMode(packs, out) {
    for (const pack of packs) {
        for (const cat of pack.categories) {
            // Collapse the subcategory out of the breadcrumb when it adds no
            // info: either the synthetic "(root)" label (`subcategoryFor`'s
            // marker for nodes whose category equals the repo's
            // `categoryRoot`) or a duplicate of the pack label itself
            // (happens for user picks under "(uncategorized)" where both
            // labels collapse to the same synthetic token).
            const subRedundant = cat.name === "(root)" || cat.name === pack.label;
            const crumbs = subRedundant ? [pack.label] : [pack.label, cat.name];
            const breadcrumb = crumbs.join(" › ");
            for (const n of cat.nodes) {
                out.push({
                    display: n.display,
                    type: n.type,
                    removable: !!pack.isUserPicks,
                    breadcrumb,
                });
            }
        }
    }
}

// Emits one folder per theme bucket under `parentCtx`. Each theme folder
// holds a flat sorted list of its picks — no further nesting. Folder
// `path` uses the canonical key (not the resolved display label) so the
// user's expansion state in `pathStates` survives a future upstream
// casing change in the most-common label for that theme.
function emitThemeChildren(parentCtx, themes) {
    const themeEntries = [...themes.entries()]
        .map(([canonical, bucket]) => ({
            canonical,
            bucket,
            label: pickDisplayLabel(bucket.displayLabels) || canonical,
        }))
        .sort((a, b) => compareNames(a.label, b.label));

    for (const { canonical, bucket, label } of themeEntries) {
        parentCtx.folder({
            name: label,
            count: bucket.nodes.length,
            path: canonical,
            build: (sub) => {
                const sortedNodes = [...bucket.nodes].sort(
                    (a, b) => compareNames(a.display, b.display),
                );
                for (const n of sortedNodes) {
                    // Pack badge — only for real pack labels. Skip
                    // unresolved (origin IS the unknown) and synthetic
                    // (uncategorized)/(unresolved) parens-prefixed names.
                    let badge = null;
                    if (!n.unresolved) {
                        const loc = findPackPathForType(n.type);
                        if (loc && loc.packLabel && !loc.packLabel.startsWith("(")) {
                            badge = loc.packLabel;
                        }
                    }
                    sub.leaf({
                        row: makeNodeLeafRow({
                            display: n.display,
                            type: n.type,
                            removable: true,
                            unresolved: !!n.unresolved,
                            packBadge: badge,
                            onClick: () => insertNode(n.type),
                        }),
                    });
                }
            },
        });
    }
}

addSection({
    id: SECTION_ID_WORKFLOWS,
    label: WORKFLOWS_GROUP_LABEL,
    iconKind: "workflows",
    rootContextMenu: workflowsRootContextMenu,
    // No emptyMessage — when the workflow store is empty and no search is
    // active, we silently hide the section. Saving a workflow uses the save
    // modal's "+ New directory…" entry to seed the first directory; once the
    // section is non-empty, right-click on the "Workflows" header creates
    // additional top-level dirs (see `workflowsRootContextMenu`).
    gather(q) {
        return gatherWorkflows(q);
    },
    build(ctx) {
        for (const dir of ctx.data.directories) renderGatheredDir(ctx, dir);
    },
});

// Tags section — flat list of tag folders, each containing the workflows
// carrying that tag. Workflows that share a tag appear under the tag folder
// regardless of which directory they live in. Click loads the workflow from
// its real path; the right-click menu operates on the workflow at its
// canonical location, so renames/moves originating here update the same
// underlying entry the Workflows section shows.
addSection({
    id: SECTION_ID_TAGS,
    label: "Tags",
    iconKind: "folder",
    // No emptyMessage — until any workflow carries a tag, the section stays
    // silent rather than nag the user about an empty feature.
    gather(q) {
        return gatherTags(q);
    },
    build(ctx) {
        for (const tag of ctx.data.tags) {
            ctx.folder({
                name: tag.name,
                count: tag.entries.length,
                path: tag.name,
                build: (tagCtx) => {
                    for (const entry of tag.entries) {
                        // Module-ness is per-workflow, not per-tag-folder —
                        // a workflow tagged `module` is still a module when
                        // it shows up under any other tag it carries.
                        const moduleEntry = isModuleWorkflow(entry.path, entry.wfName);
                        tagCtx.leaf({
                            row: makeWorkflowLeafRow({
                                name: entry.wfName,
                                dirName: entry.path.join(" / "),
                                wfPath: [...entry.path, entry.wfName].join("/"),
                                onClick: () => moduleEntry
                                    ? insertWorkflowOntoCanvas(entry.path, entry.wfName)
                                    : loadWorkflowOntoCanvas(entry.path, entry.wfName),
                                onContextMenu: (e) => workflowRowContextMenu(e, entry.path, entry.wfName, false),
                                isModule: moduleEntry,
                            }),
                        });
                    }
                },
            });
        }
    },
});

// Render one gathered directory entry (and its descendants) under
// `parentCtx`. Layout per directory: subdirectories first (so their own
// trees nest under the parent), then the synthetic Archive folder if any
// archived workflows exist at this level, then active workflows last so
// the freshest version sits closest to the bottom of the directory.
function renderGatheredDir(parentCtx, dir) {
    const dirPath = dir.path;
    const parentPath = dirPath.slice(0, -1);
    const dirDisplay = dirPath.join(" / ");
    const totalInTree = countWorkflowsInGatheredDir(dir);
    parentCtx.folder({
        name: dir.name,
        count: totalInTree,
        path: dir.name,
        onContextMenu: (e) => directoryRowContextMenu(e, dirPath),
        // Directory rows are draggable (drag to nest under another dir) and
        // also drop targets (drop a workflow or another dir onto them).
        draggablePayload: { type: "directory", parentPath, name: dir.name },
        dropTarget: { kind: "dir", path: dirPath },
        build: (dirCtx) => {
            for (const sub of dir.subdirs) renderGatheredDir(dirCtx, sub);
            if (dir.archived.length > 0) {
                dirCtx.folder({
                    name: "Archive",
                    count: dir.archived.length,
                    iconKind: "archive",
                    path: "Archive",
                    onContextMenu: (e) => archiveFolderContextMenu(e, dirPath, dir.archived.length),
                    // Archive folders accept workflow drops only (drop = archive
                    // in this directory; cross-dir drops move + archive).
                    dropTarget: { kind: "archive", path: dirPath },
                    build: (archCtx) => {
                        for (const wfName of dir.archived) {
                            const displayInfo = getArchiveDisplayInfo(dirPath, wfName);
                            archCtx.leaf({
                                row: makeWorkflowLeafRow({
                                    name: displayInfo.label,
                                    dirName: dirDisplay,
                                    wfPath: [...dirPath, wfName].join("/"),
                                    onClick: () => loadWorkflowOntoCanvas(dirPath, wfName),
                                    onContextMenu: (e) => workflowRowContextMenu(e, dirPath, wfName, true),
                                    draggablePayload: { type: "workflow", path: dirPath, name: wfName },
                                    secondaryText: displayInfo.meta,
                                }),
                            });
                        }
                    },
                });
            }
            for (const wfName of dir.active) {
                const moduleEntry = isModuleWorkflow(dirPath, wfName);
                dirCtx.leaf({
                    row: makeWorkflowLeafRow({
                        name: wfName,
                        dirName: dirDisplay,
                        wfPath: [...dirPath, wfName].join("/"),
                        // Module convention: left-click inserts; non-module
                        // entries left-click loads (replaces canvas, with
                        // confirm modal as before). Both actions are always
                        // available via the right-click menu regardless.
                        onClick: () => moduleEntry
                            ? insertWorkflowOntoCanvas(dirPath, wfName)
                            : loadWorkflowOntoCanvas(dirPath, wfName),
                        onContextMenu: (e) => workflowRowContextMenu(e, dirPath, wfName, false),
                        draggablePayload: { type: "workflow", path: dirPath, name: wfName },
                        isModule: moduleEntry,
                        isPublished: workflowHasTag(dirPath, wfName, PUBLISHED_TAG),
                    }),
                });
            }
        },
    });
}

// =============================================================================
// Panel rendering
// =============================================================================
// =============================================================================
// Compare mode (#181) — host + helpers.
//
// `renderSidebar` is the panel entry point bound by koolook_sidebar.js. With
// compare off it renders the single live `renderPanel`, exactly as before.
// With compare on it lays out two columns — the live working copy and a
// read-only render of a chosen snapshot — plus a bottom "Compare mode" status,
// then tints the comparison column from the snapshot diff. The existing
// `renderPanel` + CSS are reused verbatim; only the data source differs.
// =============================================================================

let compareSnapshot = null;   // null = compare off; else the chosen snapshot object
let compareMeta = null;       // { fileName, displayName } of the chosen snapshot
let sidebarContainer = null;  // remembered so a toggle can re-render in place
let liveListeners = null;     // AbortController for the live panel's window listeners
// Which compare panel is the editable DESTINATION (#197). "A" = the live
// working kit (left, default); "B" = the loaded snapshot (right). The swap
// toggle flips it; the inactive side becomes the read-only SOURCE and carries
// the read-only guard + the pull-in context menu. Reset to "A" on every
// enter/exit so a re-entered Compare always starts from the 80% case (B->A).
let activeSide = "A";
// Diff-filter chips (#197). A Set of enabled statuses ("new" | "diff"). When
// non-empty, the snapshot (B) panel shows only matching items — their folders
// force-expanded, everything else hidden — so the user can review just what's
// new / modified, then clear the chips to collapse back. Reset on enter/exit.
let compareFilter = new Set();
// The snapshot (B) panel is a working COPY of a file. A->B copies edit it
// IN MEMORY (no per-copy disk write — autosaves must stay a pure safety net,
// never an A->B write target). `compareDirty` tracks pending edits so the
// footer shows "Not saved" + a Save button; the user saves explicitly to a
// NAMED file via saveCompareSnapshot. Reset on enter / exit / save. (#197)
let compareDirty = false;
// In-flight guard for the explicit Save so rapid Save clicks can't fire
// overlapping writePreset POSTs (last-writer-wins).
let compareSaving = false;

// Run `fn` synchronously with the render path pointed at `snapshot`'s data
// instead of live state. Read-only: always clears the overrides afterwards
// (even if `fn` throws) so later live renders see live data. Must wrap only
// synchronous render work — never an await.
function withSnapshotSource(snapshot, fn) {
    setPicksRenderSource(snapshot && Array.isArray(snapshot.picks) ? snapshot.picks : []);
    setWorkflowsRenderSource(snapshot && snapshot.workflows ? snapshot.workflows : { directories: {} });
    try {
        return fn();
    } finally {
        clearPicksRenderSource();
        clearWorkflowsRenderSource();
    }
}

// Run `fn` (a synchronous tree render) with the snapshot panel's own expansion
// map active, so its folder state never collides with the live panel's. Must
// wrap only synchronous render work; always restores the live map afterwards.
function withComparePathStates(fn) {
    const saved = pathStates;
    pathStates = comparePathStates;
    try {
        return fn();
    } finally {
        pathStates = saved;
    }
}

export function renderSidebar(container) {
    sidebarContainer = container;
    // Drop the previous mount's live-panel window listeners before re-rendering
    // (toggling Compare re-runs renderPanel for the live panel).
    if (liveListeners) liveListeners.abort();
    liveListeners = new AbortController();
    const signal = liveListeners.signal;

    if (!compareSnapshot) {
        container.classList.remove("koolook-compare-host");
        renderPanel(container, { onToggleCompare: enterCompareMode, signal });
        return;
    }

    container.innerHTML = "";
    container.classList.remove("koolook-sidebar");
    container.classList.add("koolook-compare-host");

    const snapName = compareSnapName();   // clean name — never the long autosave path
    const liveIsActive = activeSide === "A";

    const split = document.createElement("div");
    split.className = "koolook-compare-split";
    // Each column wraps a panel host (the rendered sidebar) plus a SOURCE/TARGET
    // footer stripe, so the orientation reads at the bottom of each half.
    const leftCol = makeCompareColumn();
    const rightCol = makeCompareColumn();
    split.appendChild(leftCol.col);
    split.appendChild(rightCol.col);
    container.appendChild(split);

    // Exactly one side is the editable TARGET (`activeSide`); the other is the
    // read-only SOURCE and carries the guard + pull-in. The single pull-in is
    // handed to whichever side is the source; its copy handlers derive their
    // direction (B->A into the live kit, or A->B written back into the snapshot
    // file) from `activeSide` (#197).
    const pullIn = makePullIn();
    renderPanel(leftCol.host, {
        onToggleCompare: exitCompareMode,
        signal,
        readOnly: !liveIsActive,
        pullIn: liveIsActive ? null : pullIn,
        showUpdateFooter: false,
    });
    renderPanel(rightCol.host, {
        compare: true,
        snapshot: compareSnapshot,
        onToggleCompare: exitCompareMode,
        signal,
        compareName: snapName,
        readOnly: true,
        pullIn: liveIsActive ? pullIn : null,
        showUpdateFooter: false,
    });
    // Diff/tint/filter follow the SOURCE (the read-only side you copy FROM):
    // "new" = in the source, not the target — the copy candidates — so the
    // highlight lands where you'd grab them. Default (target=A) → source=B;
    // after a swap (target=B) → source=A. Live reads here are live (the panel
    // renders cleared the snapshot override in its finally).
    const livePicks = loadUserPicks();
    const liveStore = getAllWorkflowsForExport();
    const snapPicks = Array.isArray(compareSnapshot.picks) ? compareSnapshot.picks : [];
    const snapStore = compareSnapshot.workflows && typeof compareSnapshot.workflows === "object"
        ? compareSnapshot.workflows
        : { directories: {} };
    const sourceHost = liveIsActive ? rightCol.host : leftCol.host;
    const sourcePicks = liveIsActive ? snapPicks : livePicks;
    const sourceStore = liveIsActive ? snapStore : liveStore;
    const targetPicks = liveIsActive ? livePicks : snapPicks;
    const targetStore = liveIsActive ? liveStore : snapStore;
    const counts = applyCompareTint(sourceHost, targetPicks, targetStore, sourcePicks, sourceStore);
    applyCompareFilter(sourceHost);

    // Stripe 1 — SOURCE/TARGET orientation only (one line per column).
    (liveIsActive ? leftCol : rightCol).col.classList.add("koolook-compare-active");
    labelColumnFoot(leftCol.foot, { sideLetter: "A", role: liveIsActive ? "target" : "source", name: "your kit" });
    labelColumnFoot(rightCol.foot, { sideLetter: "B", role: liveIsActive ? "source" : "target", name: snapName });

    // Stripe 2 — the dedicated SAVE stripe (save state + instructions + button).
    container.appendChild(buildSaveStripe());
    container.appendChild(buildCompareBar(counts));
}

// A compare column: a flex-column holding the rendered panel (`host`) and a
// SOURCE/TARGET footer stripe (`foot`).
function makeCompareColumn() {
    const col = document.createElement("div");
    col.className = "koolook-compare-col";
    const host = document.createElement("div");
    host.className = "koolook-compare-panelhost";
    const foot = document.createElement("div");
    foot.className = "koolook-compare-colfoot";
    col.appendChild(host);
    col.appendChild(foot);
    return { col, host, foot };
}

// Stripe 1: the SOURCE/TARGET footer for one column — orientation only (one
// line). Save state lives in its own stripe (buildSaveStripe), not here.
function labelColumnFoot(footEl, { sideLetter, role, name }) {
    footEl.className = `koolook-compare-colfoot koolook-foot-${role}`;
    footEl.replaceChildren();
    const roleEl = document.createElement("span");
    roleEl.className = "koolook-foot-role";
    roleEl.textContent = role === "target" ? "TARGET" : "SOURCE";
    const nameEl = document.createElement("span");
    nameEl.className = "koolook-foot-name";
    nameEl.textContent = `${sideLetter} · ${name}`;
    footEl.appendChild(roleEl);
    footEl.appendChild(nameEl);
}

// True when the loaded snapshot is an autosave shadow (rotating safety file),
// not a user-named snapshot — A->B edits must Save to a NAMED file, not back
// into the autosave.
function isAutosaveTarget() {
    const dir = compareMeta && compareMeta.dir ? compareMeta.dir : "";
    return dir.endsWith("_autosave");
}

// A clean display name for the snapshot — never the long autosave path. For an
// autosave shadow (`Foo_autosave/...`) show the named parent + an "autosave"
// marker so the user knows it's the recovery copy, not the named file.
function compareSnapName() {
    const dir = compareMeta && compareMeta.dir ? compareMeta.dir : "";
    if (dir === "_unsaved_autosave") return "unsaved recovery · autosave";
    if (dir.endsWith("_autosave")) return `${dir.slice(0, -"_autosave".length)} · autosave`;
    return (compareMeta && compareMeta.fileName) ? compareMeta.fileName : "snapshot";
}

// Stripe 2: the dedicated SAVE stripe — all the save state + instructions for
// the snapshot side, separate from the SOURCE/TARGET footers. Your kit auto-
// saves; the snapshot's A->B edits live in memory until you Save them to a
// NAMED file. Shows the unsaved state + a Save button whenever the snapshot is
// dirty (regardless of which side is the target, so it survives a swap).
function buildSaveStripe() {
    const stripe = document.createElement("div");
    stripe.className = "koolook-compare-savebar";
    const msg = document.createElement("span");
    msg.className = "koolook-savebar-msg";
    if (compareDirty) {
        msg.classList.add("koolook-savebar-unsaved");
        msg.textContent = isAutosaveTarget()
            ? "● Snapshot has unsaved edits — it's an autosave, so Save writes a named file."
            : `● Snapshot "${compareSnapName()}" has unsaved edits — not saved to disk yet.`;
    } else {
        msg.textContent = "Your kit auto-saves · the snapshot is a read-only file; edits Save to a named file.";
    }
    stripe.appendChild(msg);
    if (compareDirty) {
        const btn = document.createElement("button");
        btn.type = "button";
        btn.className = "koolook-savebar-btn";
        btn.textContent = isAutosaveTarget() ? "Save as file…" : "Save to file";
        btn.title = "Save the merged snapshot to a named file";
        btn.addEventListener("click", saveCompareSnapshot);
        stripe.appendChild(btn);
    }
    return stripe;
}

// The bottom bar: the green/red diff legend (doubling as filter chips) plus the
// A<->B swap toggle.
function buildCompareBar({ newCount, diffCount }) {
    const bar = document.createElement("div");
    bar.className = "koolook-compare-status";
    bar.appendChild(makeFilterChip(
        "new", "new", newCount,
        "In the SOURCE side, not the target — copy candidates. Click to show just these.",
    ));
    bar.appendChild(makeFilterChip(
        "diff", "modified", diffCount,
        "In both, but the graph differs. Click to show just these.",
    ));
    const swapBtn = document.createElement("button");
    swapBtn.type = "button";
    swapBtn.className = "koolook-compare-swap";
    swapBtn.textContent = "⇄ Swap A↔B";
    swapBtn.title = "Flip source/target — which side you copy into";
    swapBtn.addEventListener("click", swapCompareSides);
    bar.appendChild(swapBtn);
    return bar;
}

// A legend swatch that doubles as a filter toggle. `status` is "new" | "diff";
// enabling it filters the SOURCE panel to matching items.
function makeFilterChip(status, label, count, tip) {
    const chip = document.createElement("button");
    chip.type = "button";
    chip.className = "koolook-cmp-chip";
    if (compareFilter.has(status)) chip.classList.add("koolook-cmp-chip-on");
    chip.title = tip;
    const dot = document.createElement("span");
    dot.className = `koolook-cmp-dot koolook-cmp-dot-${status}`;
    chip.appendChild(dot);
    chip.appendChild(document.createTextNode(`${count} ${label}`));
    chip.addEventListener("click", () => toggleCompareFilter(status));
    return chip;
}

function toggleCompareFilter(status) {
    if (compareFilter.has(status)) compareFilter.delete(status);
    else compareFilter.add(status);
    rerenderSidebar();
}

// Post-render diff filter for the SOURCE panel. With chips enabled, hide
// every leaf whose status isn't selected, hide folders with no matching
// descendant, and force-expand the folders that do — leaving a tree of just the
// new/modified items. A no-op when no chip is active (normal full view). Relies
// on the tinted classes applyCompareTint added, and on the nested-DOM tree
// (collapsed children are present, just display:none).
function applyCompareFilter(panelEl) {
    if (!panelEl || compareFilter.size === 0) return;
    const sels = [];
    if (compareFilter.has("new")) sels.push(".koolook-cmp-new");
    if (compareFilter.has("diff")) sels.push(".koolook-cmp-diff");
    const matchSel = sels.join(",");
    if (!matchSel) return;
    panelEl.classList.add("koolook-cmp-filtering");
    for (const leaf of panelEl.querySelectorAll(".koolook-leaf")) {
        leaf.style.display = leaf.matches(matchSel) ? "" : "none";
    }
    // querySelector ignores display, so an ancestor still detects a match in a
    // (separately shown) descendant regardless of processing order.
    for (const childrenEl of panelEl.querySelectorAll(".koolook-children")) {
        const wrapper = childrenEl.parentElement;
        if (childrenEl.querySelector(matchSel)) {
            childrenEl.style.display = "";            // force-expand
            if (wrapper) wrapper.style.display = "";
        } else if (wrapper) {
            wrapper.style.display = "none";           // hide the whole folder
        }
    }
}

function rerenderSidebar() {
    if (sidebarContainer) renderSidebar(sidebarContainer);
}

// Enter Compare mode: reuse the existing Load dialog in read-only "choose"
// mode (`onChoose`) so picking a preset hands back its parsed snapshot WITHOUT
// applying it. Never calls applySnapshot — the non-destructive guarantee.
function enterCompareMode() {
    showLoadSnapshotDialog({
        listPresets,
        readPreset,
        deletePreset,
        applySnapshot,
        setCurrentPresetName,
        getCurrentPresetName,
        getLibraryInfo,
        saveSettings,
        browseDirectories,
        createBrowseDirectory,
        writePreLoadAutosave,
        markStateSaved,
        markStateAutosaved,
        listAutosaves,
        revealPresetFolder,
        onToast: toast,
        onChoose: (snap, meta) => {
            compareSnapshot = snap;
            compareMeta = meta || null;
            activeSide = "A";   // always (re-)enter in the B->A direction
            compareFilter.clear();
            // The published filter is a Workflows-browsing affordance; a
            // Compare view diffs full snapshots, so clear it on entry (the
            // rebuilt "P" button then re-seeds un-highlighted). Otherwise both
            // compare columns would render filtered with no toggle to undo it.
            publishedOnly = false;
            comparePathStates.clear();   // fresh snapshot starts with default expansion
            compareDirty = false;        // freshly loaded — no pending edits
            rerenderSidebar();
        },
    });
}

function exitCompareMode() {
    const doExit = () => {
        compareSnapshot = null;
        compareMeta = null;
        activeSide = "A";
        compareFilter.clear();
        comparePathStates.clear();
        compareDirty = false;
        rerenderSidebar();
    };
    // Don't silently lose in-memory A->B merges the user hasn't saved.
    if (compareDirty) {
        showConfirmModal({
            title: "Discard unsaved snapshot edits?",
            message: "You copied items into the snapshot but haven't saved them to a file yet. Exit Compare and discard those edits?",
            confirmLabel: "Discard",
            danger: true,
            onConfirm: doExit,
        });
        return;
    }
    doExit();
}

// Flip which side is the editable destination, then re-render so the read-only
// guard + pull-in move to the new source side (#197).
function swapCompareSides() {
    activeSide = activeSide === "A" ? "B" : "A";
    rerenderSidebar();
}

// The pull-in for whichever side is the read-only SOURCE. The copy is
// path-preserving (it lands at the same folder path on the target, creating
// missing folders / merging into existing ones — see copyWorkflowIntoStore) and
// directional: TARGET = the active side. B->A writes the LIVE kit; A->B writes
// back into the snapshot FILE on disk. Reads the source only — never
// applySnapshot, never aliases a graph (the engine deep-clones).
function makePullIn() {
    const targetIsLive = activeSide === "A";
    return {
        destLabel: activeSide,                        // "A" or "B" — the target
        copyNode: (type) => (targetIsLive ? copyNodeToLive(type) : copyNodeToSnapshot(type)),
        copyWorkflow: (wfPath) => (targetIsLive ? copyWorkflowToLive(wfPath) : copyWorkflowToSnapshot(wfPath)),
        copyFolder: (dirSegs, label) => (targetIsLive ? copyFolderToLive(dirSegs, label) : copyFolderToSnapshot(dirSegs, label)),
    };
}

// Summarize a bulk folder copy: "3 added, 1 kept-both, 2 already there".
function folderCopyToast(dest, label, s) {
    if (!s || s.total === 0) return `"${label}" has no workflows to copy to ${dest}.`;
    if (s.added === 0 && s.keptBoth === 0) {
        return `"${label}": all ${s.skipped} already in ${dest} — nothing copied.`;
    }
    const parts = [];
    if (s.added) parts.push(`${s.added} added`);
    if (s.keptBoth) parts.push(`${s.keptBoth} kept-both`);
    if (s.skipped) parts.push(`${s.skipped} already there`);
    return `Copied folder "${label}" → ${dest}: ${parts.join(", ")}.`;
}

function splitWfPath(wfPath) {
    const segs = String(wfPath).split("/");
    const wfName = segs.pop();
    return { dirSegs: segs, wfName };
}

// Pin the destination path open so the live panel's re-render (off
// WORKFLOWS_CHANGED_EVENT) lands with the copied item visible, not buried in a
// collapsed folder. Mirrors the Save-workflow flow's pinning.
function pinDestPath(dirSegs) {
    const pinKeys = [SECTION_ID_WORKFLOWS];
    let cur = SECTION_ID_WORKFLOWS;
    for (const seg of dirSegs) {
        cur = `${cur}/${seg}`;
        pinKeys.push(cur);
    }
    pinExpanded(pinKeys);
}

// A->B equivalent of pinDestPath: open the destination dir chain in the
// SNAPSHOT panel (its own comparePathStates map) so the copied item is visible
// after the rerender. Opens only the dir chain — never the synthetic "Archive"
// child (it has its own collapsed default and isn't in this chain).
function openCompareDestPath(dirSegs) {
    comparePathStates.set(SECTION_ID_WORKFLOWS, true);
    let cur = SECTION_ID_WORKFLOWS;
    for (const seg of dirSegs) {
        cur = `${cur}/${seg}`;
        comparePathStates.set(cur, true);
    }
}

function copyToast(dest, wfName, res) {
    if (res && res.status === "kept-both") {
        return `Copied into ${dest} as "${res.finalName}" — kept both (a different "${wfName}" was already there).`;
    }
    return `Copied "${wfName}" into ${dest}.`;
}

// ---- B -> A: copy from the snapshot into the live working kit ----
function copyNodeToLive(type) {
    const result = addToMyPicks(type);
    if (result === "added") {
        notifyPicksChanged();
        toast(`Copied "${type}" into A's favorites.`);
    } else if (result === "duplicate") {
        toast(`"${type}" is already in A's favorites.`);
    } else {
        toast(`Could not copy "${type}" — favorites write failed.`);
    }
}

function copyWorkflowToLive(wfPath) {
    const entry = getWorkflowEntryFromStore(
        compareSnapshot && compareSnapshot.workflows ? compareSnapshot.workflows : null,
        wfPath,
    );
    if (!entry || !entry.graph) {
        toast(`Could not read "${wfPath}" from the snapshot.`);
        return;
    }
    const { dirSegs, wfName } = splitWfPath(wfPath);
    const tags = Array.isArray(entry.tags) ? entry.tags : [];
    const sourceLabel = compareMeta && compareMeta.displayName ? compareMeta.displayName : "snapshot";
    let res = null;
    persistMutation({
        mutate: () => {
            res = copyWorkflowIntoLiveStore(dirSegs, wfName, entry.graph, {
                tags, module: entry.module === true, sourceLabel,
            });
            if (res.status === "skipped") return false;
            pinDestPath(dirSegs);
            return res;
        },
        onSuccess: () => toast(copyToast("A", wfName, res)),
        onNoOp: () => toast(`"${wfName}" is already in A at that path.`),
        persistFailedMessage: `Copy failed — could not write "${wfName}" to A. See console.`,
    });
}

// ---- A -> B: edit the in-memory snapshot working copy (no disk write) ----
// The snapshot panel is a working COPY of a file; A->B copies mutate it in
// memory and mark it dirty. Persisting is an explicit, user-initiated Save to a
// NAMED file (saveCompareSnapshot) — never a per-copy write, never an autosave.
function copyNodeToSnapshot(type) {
    const picks = Array.isArray(compareSnapshot.picks) ? compareSnapshot.picks : [];
    if (picks.includes(type)) {
        toast(`"${type}" is already in the snapshot.`);
        return;
    }
    compareSnapshot.picks = [...picks, type];
    compareDirty = true;
    rerenderSidebar();
    toast(`Added "${type}" to the snapshot — unsaved (use Save in the footer to keep it).`);
}

function copyWorkflowToSnapshot(wfPath) {
    const entry = getWorkflowEntryFromStore(getAllWorkflowsForExport(), wfPath);
    if (!entry || !entry.graph) {
        toast(`Could not read "${wfPath}" from your kit.`);
        return;
    }
    const { dirSegs, wfName } = splitWfPath(wfPath);
    const tags = Array.isArray(entry.tags) ? entry.tags : [];
    if (!compareSnapshot.workflows || typeof compareSnapshot.workflows !== "object") {
        compareSnapshot.workflows = { directories: {} };
    }
    const res = copyWorkflowIntoStore(compareSnapshot.workflows, dirSegs, wfName, entry.graph, {
        tags, module: entry.module === true, sourceLabel: "your kit",
    });
    if (res.status === "skipped") {
        toast(`"${wfName}" is already in the snapshot at that path.`);
        return;
    }
    compareDirty = true;
    openCompareDestPath(dirSegs);
    rerenderSidebar();
    toast(`${copyToast("B", wfName, res)} Unsaved — Save to keep it.`);
}

// Derive the named snapshot this working copy should Save to: the named file it
// was loaded from, or — when loaded from an autosave shadow (`Foo_autosave/`) —
// the named snapshot `Foo` it shadows. Empty when loaded from `_unsaved_autosave`
// (no named parent) so the user types a fresh name.
function compareDefaultSaveName() {
    const dir = compareMeta && compareMeta.dir ? compareMeta.dir : "";
    if (dir === "_unsaved_autosave") return "";
    if (dir.endsWith("_autosave")) return dir.slice(0, -"_autosave".length);
    return compareMeta && compareMeta.fileName ? compareMeta.fileName : "";
}

// Explicit Save of the in-memory snapshot edits to a NAMED file (never an
// autosave). Pre-fills the name with the shadowed / loaded name so the user
// confirms exactly where it lands, writes to the default library dir, and clears
// the dirty flag. Independent of the LIVE save tracker — this writes a snapshot
// file; it doesn't change what your live session tracks.
function saveCompareSnapshot() {
    if (!compareSnapshot) return;
    const snapshotRef = compareSnapshot;
    showInputModal({
        title: "Save snapshot",
        label: "Save merged snapshot as",
        defaultValue: compareDefaultSaveName(),
        placeholder: "snapshot name",
        confirmLabel: "Save",
        onSubmit: async (rawName) => {
            // Sanitize like every other writePreset caller (clean toast on bad
            // input instead of an opaque server 400).
            const name = sanitizeName(rawName);
            if (!name) {
                toast("Snapshot name is empty after stripping unsafe characters.");
                return;
            }
            const doWrite = async () => {
                if (compareSaving) {
                    toast("A snapshot save is already in progress.");
                    return;
                }
                compareSaving = true;
                try {
                    await writePreset(name, snapshotRef);   // default library dir — never an autosave subdir
                } catch (e) {
                    console.error("[Koolook] snapshot save failed:", e);
                    toast(`Could not save snapshot "${name}": ${e.message}`);
                    return;
                } finally {
                    compareSaving = false;
                }
                // If the user exited / loaded a different snapshot during the
                // write, the dirty flag + meta now belong to something else.
                if (compareSnapshot !== snapshotRef) {
                    toast(`Saved snapshot "${name}".`);
                    return;
                }
                compareMeta = { fileName: name, displayName: name };   // now tracks the named file
                compareDirty = false;
                rerenderSidebar();
                toast(`Saved snapshot "${name}" to disk.`);
            };
            // Confirm the destination before writing — `writePreset` ends in an
            // atomic os.replace, so an accepted default name could otherwise
            // silently overwrite a DIFFERENT same-named snapshot. Mirrors the
            // live Save flow's existence guard (modals.js promptForName).
            const exists = await presetExists(name);
            if (exists === null) {
                toast("Cannot reach the preset library to verify the name. Save canceled — check the library path or your connection.");
                return;
            }
            if (exists === true) {
                showConfirmModal({
                    title: "Overwrite existing snapshot?",
                    message: `A snapshot named "${name}" already exists. Overwrite it?`,
                    confirmLabel: "Overwrite",
                    danger: true,
                    onConfirm: doWrite,
                });
                return;
            }
            await doWrite();
        },
    });
}

// ---- Bulk folder copy (the merge case) ----
function copyFolderToLive(dirSegs, label) {
    const sourceStore = compareSnapshot && compareSnapshot.workflows ? compareSnapshot.workflows : { directories: {} };
    const sourceLabel = compareMeta && compareMeta.displayName ? compareMeta.displayName : "snapshot";
    let summary = null;
    persistMutation({
        mutate: () => {
            summary = copyFolderIntoLiveStore(sourceStore, dirSegs, { sourceLabel });
            if (summary.added === 0 && summary.keptBoth === 0) return false;   // nothing new landed
            pinDestPath(dirSegs);
            return summary;
        },
        onSuccess: () => toast(folderCopyToast("A", label, summary)),
        onNoOp: () => toast(folderCopyToast("A", label, summary)),
        persistFailedMessage: `Folder copy failed — could not write "${label}" to A. See console.`,
    });
}

function copyFolderToSnapshot(dirSegs, label) {
    const sourceStore = getAllWorkflowsForExport();
    if (!compareSnapshot.workflows || typeof compareSnapshot.workflows !== "object") {
        compareSnapshot.workflows = { directories: {} };
    }
    const summary = copyFolderIntoStore(compareSnapshot.workflows, sourceStore, dirSegs, { sourceLabel: "your kit" });
    if (summary.added === 0 && summary.keptBoth === 0) {
        toast(folderCopyToast("B", label, summary));   // nothing new — no edit
        return;
    }
    compareDirty = true;
    openCompareDestPath(dirSegs);
    rerenderSidebar();
    toast(`${folderCopyToast("B", label, summary)} Unsaved — Save to keep it.`);
}

// Tint the SOURCE column from the diff and return the counts for the legend.
// The diff is SOURCE-relative-to-TARGET — green/new = present in the source but
// NOT the target (a copy candidate you'd grab from this side); red/diff = in
// both, graph differs (ignoring savedAt). Direction-aware, so it follows the
// swap: the highlight always lands on the side you copy FROM, marking what's new
// THERE. Text-only (CSS classes on existing rows). Runs after the column
// rendered with the store overrides cleared, so live reads are live.
function applyCompareTint(panelEl, targetPicks, targetStore, sourcePicks, sourceStore) {
    const newPicks = new Set(diffPicks(targetPicks, sourcePicks).onlyComparison);
    let newCount = newPicks.size;
    let diffCount = 0;
    const wfStatus = diffWorkflows(targetStore, sourceStore);
    for (const key of Object.keys(wfStatus)) {
        if (wfStatus[key] === "new") newCount += 1;
        else if (wfStatus[key] === "diff") diffCount += 1;
    }
    if (panelEl) {
        for (const row of panelEl.querySelectorAll("[data-koolook-node-type]")) {
            if (newPicks.has(row.dataset.koolookNodeType)) row.classList.add("koolook-cmp-new");
        }
        for (const row of panelEl.querySelectorAll("[data-koolook-wf-path]")) {
            const status = wfStatus[row.dataset.koolookWfPath];
            if (status === "new") row.classList.add("koolook-cmp-new");
            else if (status === "diff") row.classList.add("koolook-cmp-diff");
        }
    }
    return { newCount, diffCount };
}

export function renderPanel(container, options = {}) {
    const { compare = false, snapshot = null, onToggleCompare = null, signal = null, compareName = "", readOnly = compare, pullIn = null, showUpdateFooter = true } = options;
    // Compare mode (#181): when `compare` is set, every tree (re-)render in
    // this panel reads from the loaded `snapshot` via the read-only store
    // overrides, and the live-change listeners at the bottom are skipped so
    // the snapshot panel stays static. compare=false is byte-identical to the
    // pre-#181 single live panel.
    //
    // `readOnly` (#197) is orthogonal: it applies the capture-phase guard and
    // the optional `pullIn` copy menu. It defaults to `compare` (so existing
    // callers are unchanged), but the compare host sets it per active side so
    // the swap can move the guard onto the live panel without changing its
    // data source.
    const withSource = compare
        ? (fn) => withSnapshotSource(snapshot, () => withComparePathStates(fn))
        : (fn) => fn();
    // `signal` (from renderSidebar's AbortController) lets a re-render drop the
    // previous mount's window listeners, so toggling Compare never leaks a set.
    const listenerOpts = signal ? { signal } : undefined;
    ensureStyle();
    container.innerHTML = "";
    container.classList.add("koolook-sidebar");
    if (readOnly) {
        container.classList.add("koolook-compare-panel");
        // Read-only comparison panel (#181): the same interactive renderPanel is
        // reused (chrome stays visually identical), but the read-only SOURCE side
        // must never mutate or load live state. Capture-phase guards allow
        // navigation only — folder expand/collapse, search, and the A/B exit
        // button — and neutralize every mutating/loading affordance: leaf
        // load/insert clicks, pick ×/+, the snapshot + tools buttons, the
        // grouping mode toggle (which writes the shared global GROUP_MODE_KEY),
        // context menus, and drag — dragstart on the source PLUS dragover/drop so
        // a drag begun in the live panel can't land on (and mutate via) this
        // column. Buttons stay visible but inert.
        //
        // The ONE affordance allowed through (#197): when a `pullIn` is wired,
        // right-clicking a node or workflow row opens a single "Copy to <active>"
        // item. Direction is set by the swap; everything else stays blocked.
        const NAV_ALLOW =
            ".koolook-search, [data-koolook-compare-exit], .koolook-row:not(.koolook-leaf)";
        container.addEventListener("click", (e) => {
            const t = e.target;
            if (t instanceof Element && t.closest(NAV_ALLOW)) return;
            e.preventDefault();
            e.stopPropagation();
        }, true);
        container.addEventListener("contextmenu", (e) => {
            // Always suppress the native menu and stop the row's own (live-
            // mutating) context-menu handler from firing. Then, if a pull-in is
            // wired, open the copy menu for the pull-able row under the cursor.
            e.preventDefault();
            e.stopPropagation();
            if (!pullIn) return;
            const t = e.target instanceof Element ? e.target : null;
            if (!t) return;
            const nodeRow = t.closest("[data-koolook-node-type]");
            if (nodeRow) {
                showContextMenu(e, [{
                    label: `Copy to ${pullIn.destLabel}`,
                    action: () => pullIn.copyNode(nodeRow.dataset.koolookNodeType),
                }]);
                return;
            }
            const wfRow = t.closest("[data-koolook-wf-path]");
            if (wfRow) {
                showContextMenu(e, [{
                    label: `Copy to ${pullIn.destLabel}`,
                    action: () => pullIn.copyWorkflow(wfRow.dataset.koolookWfPath),
                }]);
                return;
            }
            // Folder pull-in (#197): bulk-copy a whole workflow folder (the merge
            // case). Workflow folders only (node/tag folders aren't real store
            // dirs); the synthetic "Archive" folder is skipped. The Workflows
            // section root copies the entire tree.
            const dirRow = t.closest("[data-koolook-folder-path]");
            if (dirRow) {
                const fp = dirRow.dataset.koolookFolderPath || "";
                const isWfFolder = fp === SECTION_ID_WORKFLOWS || fp.startsWith(`${SECTION_ID_WORKFLOWS}/`);
                const segs = fp === SECTION_ID_WORKFLOWS
                    ? []
                    : fp.slice(SECTION_ID_WORKFLOWS.length + 1).split("/");
                if (isWfFolder && segs[segs.length - 1] !== "Archive") {
                    const label = segs.length ? segs[segs.length - 1] : "all workflows";
                    showContextMenu(e, [{
                        label: `Copy folder "${label}" → ${pullIn.destLabel} (with contents)`,
                        action: () => pullIn.copyFolder(segs, label),
                    }]);
                }
            }
        }, true);
        container.addEventListener("dragstart", (e) => { e.preventDefault(); e.stopPropagation(); }, true);
        container.addEventListener("dragover", (e) => { e.preventDefault(); e.stopPropagation(); }, true);
        container.addEventListener("drop", (e) => { e.preventDefault(); e.stopPropagation(); }, true);
    }

    // Forward declarations — `tree` and `search` are created several rows
    // below, but the Nodes-row mode toggle (built mid-renderPanel) needs to
    // re-render the tree from its click handler. JS closures bind by
    // reference, so the handler resolves both at click time, by which point
    // the assignments below have run. Without these `let` placeholders the
    // toggle would have to be appended out-of-order.
    let tree;
    let search;
    const rerenderTree = () => {
        if (tree) withSource(() => renderTree({ treeEl: tree, query: search ? search.value : "" }));
    };

    // Three small wrappers over the snapshot dialogs. Each opens directly
    // — no tabbed parent modal — so the user goes from toolbar click to
    // the right form in one step. Capability functions are passed in
    // explicitly to keep `modals.js` UI-only (no `snapshot.js` import
    // crossing the layer).
    const openSaveDialog = () => showSaveSnapshotDialog({
        getCurrentPresetName,
        setCurrentPresetName,
        presetExists,
        writePreset,
        gatherSnapshot,
        sanitizeName,
        getLibraryInfo,
        saveSettings,
        browseDirectories,
        createBrowseDirectory,
        revealPresetFolder,
        markStateSaved,
        onToast: toast,
    });
    const openLoadDialog = () => showLoadSnapshotDialog({
        listPresets,
        readPreset,
        deletePreset,
        applySnapshot,
        setCurrentPresetName,
        getCurrentPresetName,
        getLibraryInfo,
        saveSettings,
        browseDirectories,
        createBrowseDirectory,
        writePreLoadAutosave,
        markStateSaved,
        markStateAutosaved,
        listAutosaves,
        revealPresetFolder,
        onToast: toast,
    });

    // ---- Row 0: Snapshot library action bar (top-level kit ops) ----
    // Mirrors the Nodes/Workflows action-row pattern but lives above the
    // search field — these are infrequent meta-actions (save/load the
    // whole Kforge Labs state as a named preset) and shouldn't be
    // mixed into the per-section toolbars.
    const snapshotRow = document.createElement("div");
    snapshotRow.className = "koolook-actions-row";

    // Snapshot status indicator (replaces the static "Snapshot" label).
    // Layout:  [● <preset name>  · <state>]   where:
    //   • the dot's color encodes status (saved=green, autosaved=blue,
    //     unsaved=orange, none=grey)
    //   • the name is the user's last-loaded/saved preset, ellipsised if
    //     long; "(no snapshot)" italic when nothing is tracked
    //   • the state is a small textual qualifier ("saved" / "auto-saved" /
    //     "unsaved")
    // Tooltip on the whole row carries the long-form explanation including
    // the latest auto-save timestamp when relevant.
    const snapshotStatus = document.createElement("div");
    snapshotStatus.className = "koolook-snap-status";
    const snapshotDot = document.createElement("span");
    snapshotDot.className = "koolook-snap-status-dot koolook-snap-status-none";
    snapshotStatus.appendChild(snapshotDot);
    const snapshotName = document.createElement("span");
    snapshotName.className = "koolook-snap-status-name";
    snapshotStatus.appendChild(snapshotName);
    const snapshotState = document.createElement("span");
    snapshotState.className = "koolook-snap-status-state";
    snapshotStatus.appendChild(snapshotState);
    snapshotRow.appendChild(snapshotStatus);

    let snapshotLibraryPath = "";
    let snapshotStatusRefreshSeq = 0;

    function formatLocalTime(iso) {
        if (!iso) return "not saved yet";
        const d = new Date(iso);
        if (isNaN(d.getTime())) return iso;
        return formatLocalStamp(d);
    }

    function snapshotTooltip(status) {
        const stamp = status.state === "autosaved"
            ? status.lastAutosaveAt
            : status.lastNamedSaveAt;
        const location = snapshotLibraryPath || "loading...";
        // Drifted (#161): the named snapshot file on disk diverged from the
        // live state when the session started. Tooltip carries the recovery
        // instructions so the user understands what the pill colour means
        // and how to clear it without hunting through docs.
        if (status.state === "drifted") {
            // Use ``driftDetectedAt`` (session-noticed-at), NOT
            // ``lastNamedSaveAt`` — the latter comes from a localStorage
            // baseline that may have been captured by a prior session
            // whose live state was already corrupt, and surfacing it
            // here as "Last named save" would mislead the user about
            // when the divergence actually started.
            return (
                `Tracked snapshot "${status.name || "?"}" diverges from live state.\n` +
                `Periodic auto-saves are being redirected to _unsaved_autosave/\n` +
                `to protect the named snapshot's recovery folder.\n` +
                `\n` +
                `To resolve: Load the tracked snapshot (discards live changes), or\n` +
                `Save / Quick Save (overwrites the tracked snapshot with live state).\n` +
                `\n` +
                `Drift detected: ${formatLocalTime(status.driftDetectedAt)}\n` +
                `Location: ${location}`
            );
        }
        return `Date: ${formatLocalTime(stamp)}\nLocation: ${location}`;
    }

    function refreshSnapshotStatus() {
        const seq = ++snapshotStatusRefreshSeq;
        const status = getSnapshotStatus();
        snapshotDot.className = "koolook-snap-status-dot koolook-snap-status-" + status.state;
        if (status.name) {
            snapshotName.classList.remove("koolook-snap-status-name-empty");
            snapshotName.textContent = status.name;
        } else {
            snapshotName.classList.add("koolook-snap-status-name-empty");
            snapshotName.textContent = "(no snapshot)";
        }
        let stateText = "";
        switch (status.state) {
            case "saved":
                stateText = "· saved";
                break;
            case "autosaved":
                stateText = "· auto-saved";
                break;
            case "unsaved":
                stateText = "· unsaved";
                break;
            case "drifted":
                stateText = "· drifted (reload?)";
                break;
            case "none":
            default:
                stateText = "";
                break;
        }
        snapshotState.textContent = stateText;
        snapshotStatus.title = snapshotTooltip(status);
        getLibraryInfo().then((info) => {
            if (seq !== snapshotStatusRefreshSeq) return;
            snapshotLibraryPath = info && typeof info.path === "string" ? info.path : "";
            snapshotStatus.title = snapshotTooltip(status);
        }).catch(() => {
            if (seq !== snapshotStatusRefreshSeq) return;
            snapshotLibraryPath = "";
            snapshotStatus.title = snapshotTooltip(status);
        });
    }
    if (compare) {
        // The comparison panel identifies the snapshot it is showing — its own
        // name + a static "comparing" state — rather than echoing the live
        // working-copy status. It never refreshes off live status events.
        snapshotDot.className = "koolook-snap-status-dot koolook-snap-status-comparing";
        snapshotName.classList.remove("koolook-snap-status-name-empty");
        snapshotName.textContent = compareName || "(snapshot)";
        snapshotState.textContent = "· comparing";
        snapshotStatus.title = compareName ? `Comparing: ${compareName}` : "Comparing";
    } else {
        refreshSnapshotStatus();
        window.addEventListener(PICKS_CHANGED_EVENT, refreshSnapshotStatus, listenerOpts);
        window.addEventListener(WORKFLOWS_CHANGED_EVENT, refreshSnapshotStatus, listenerOpts);
        window.addEventListener(SNAPSHOT_STATUS_CHANGED_EVENT, refreshSnapshotStatus, listenerOpts);
    }

    snapshotRow.appendChild(makeToolbarButton({
        icon: TOOLBAR_ICONS.loadSnapshot,
        title: "Load a saved snapshot (replaces current state)",
        onClick: openLoadDialog,
    }));
    // Quick Save — single-click overwrite of the currently-tracked preset
    // with no dialog. Disabled when no preset is tracked (then the regular
    // Save button is the entry point because it prompts for a new name).
    // Distinct icon from Save so the two are scannable: Save = cloud-upload,
    // Quick Save = floppy-disk save icon.
    const quickSaveBtn = makeToolbarButton({
        iconClass: "pi pi-save",
        title: "Quick Save — overwrite the currently loaded preset (no dialog)",
        onClick: async () => {
            const current = getCurrentPresetName();
            if (!current) {
                toast("No preset loaded — use Save to name a new one.");
                return;
            }
            try {
                const snap = gatherSnapshot(current);
                await writePreset(current, snap);
                markStateSaved();
                toast(`Quick-saved "${current}".`);
            } catch (e) {
                console.error("[Koolook] quick save failed:", e);
                toast(`Could not Quick Save: ${e.message}`);
            }
        },
    });
    function refreshQuickSaveDisabled() {
        quickSaveBtn.disabled = !getCurrentPresetName();
    }
    refreshQuickSaveDisabled();
    window.addEventListener(SNAPSHOT_STATUS_CHANGED_EVENT, refreshQuickSaveDisabled, listenerOpts);
    snapshotRow.appendChild(quickSaveBtn);
    snapshotRow.appendChild(makeToolbarButton({
        icon: TOOLBAR_ICONS.saveSnapshot,
        title: "Save current state — overwrites the last-loaded preset, or prompts for a name",
        onClick: openSaveDialog,
    }));
    // A/B — Compare mode toggle (#181). Same letter-button style as L/S; the
    // host (`renderSidebar`) supplies the toggle handler (enter on the live
    // panel, exit on the comparison panels).
    if (onToggleCompare) {
        const compareBtn = makeToolbarButton({
            icon: TOOLBAR_ICONS.compareSnapshot,
            title: compare
                ? "Exit Compare mode"
                : "Compare mode — open another snapshot side by side",
            onClick: onToggleCompare,
        });
        // Exempt from the read-only comparison-panel click guard so the user
        // can always toggle back out of Compare mode.
        compareBtn.dataset.koolookCompareExit = "1";
        snapshotRow.appendChild(compareBtn);
    }
    // Settings cog removed in #137: library-path change now lives inside the
    // Save dialog ("Save to...") and the Load dialog ("Load from..."), both
    // backed by the same folder picker. The cog is gone; the snapshot row
    // is now: status indicator | Load | Quick Save | Save.

    container.appendChild(snapshotRow);

    // ---- Row 0b: Tools (admin/advanced — not for daily use) ----
    // Sits between the Snapshot row and the search field. Holds power-user
    // utilities a typical user shouldn't trigger by accident: exporting the
    // curated_defaults.json (maintainer flow), the Manager-driven install of
    // missing packs (only useful on a fresh install or after wiping nodes),
    // and the canvas-handoff fallback for `security_level=normal` users
    // (drops placeholder nodes so Manager's own "Install Missing Custom
    // Nodes" UI takes over). Keeping these out of the per-section toolbars
    // declutters the everyday Add/Save flow.
    const dividerAfterSnapshot = document.createElement("div");
    dividerAfterSnapshot.className = "koolook-tree-divider";
    container.appendChild(dividerAfterSnapshot);

    const toolsRow = document.createElement("div");
    toolsRow.className = "koolook-actions-row";

    const toolsLabel = document.createElement("span");
    toolsLabel.className = "koolook-actions-label";
    toolsLabel.textContent = "Tools";
    toolsRow.appendChild(toolsLabel);

    toolsRow.appendChild(makeToolbarButton({
        icon: TOOLBAR_ICONS.exportStarter,
        title: "Export current state as starter_preset.json (copies snapshot JSON to clipboard — paste into web/starter_preset.json to ship as the next release's starter)",
        onClick: exportStarterPreset,
    }));

    // "Install missing for picks" — always enabled. The modal itself decides
    // whether anything actually needs installing (after probing Manager and
    // walking picks against the live LiteGraph registry), so leaving the
    // button enabled lets the user trigger the discovery flow whenever they
    // want a status check, including the "everything's already installed"
    // confirmation. Click handlers don't read picks here — the modal pulls
    // a fresh `loadUserPicks()` snapshot at open-time.
    toolsRow.appendChild(makeToolbarButton({
        icon: TOOLBAR_ICONS.installMissing,
        title: "Install missing custom nodes for current picks (via ComfyUI-Manager)",
        onClick: () => showInstallMissingModal({ picks: loadUserPicks() }),
    }));

    // "Drop missing onto canvas" — the security_level=normal escape hatch.
    // Discovery runs the same detect+map+resolve pipeline as the install
    // modal, then for each missing pack we instantiate one placeholder node
    // (the pack's first mapped node ID) on a fresh canvas. ComfyUI renders
    // unknown types as red error nodes, which Manager's "Install Missing
    // Custom Nodes" feature scans for — so the user gets a one-click
    // handoff to Manager's UI-driven install path that doesn't go through
    // /customnode/install/git_url's security gate.
    toolsRow.appendChild(makeToolbarButton({
        icon: TOOLBAR_ICONS.dropMissing,
        title: "Drop placeholders for missing packs onto canvas — then use Manager's \"Install Missing Custom Nodes\" (works at security_level=normal)",
        onClick: async () => {
            const picks = loadUserPicks();
            if (!picks || picks.length === 0) {
                toast("No picks to check. Add some favorites first.");
                return;
            }
            const discovery = await discoverMissingPacks(picks);
            if (!discovery.ok) {
                if (discovery.reason === "manager-unreachable") {
                    toast("ComfyUI-Manager isn't reachable — can't resolve picks to packs.");
                } else {
                    toast(`Could not load Manager's mapping database: ${discovery.error?.message || discovery.reason}.`);
                }
                return;
            }
            const byUrl = discovery.result.willInstall.byUrl;
            if (byUrl.size === 0) {
                toast("Nothing missing — every pick is installed (or unmapped).");
                return;
            }
            await dropPlaceholdersForPacks(byUrl);
        },
    }));

    toolsRow.appendChild(makeToolbarButton({
        icon: TOOLBAR_ICONS.help,
        title: "Open the Kforge Labs visual guide",
        onClick: () => {
            const opened = window.open(GUIDE_URL, "_blank", "noopener,noreferrer");
            if (!opened) {
                toast("Could not open the guide. Allow pop-ups for this page, then try again.");
            }
        },
    }));

    // "P" — Published filter toggle (issue #227). Prunes the Workflows tree to
    // only workflows tagged `published`, force-expanded, so every published
    // setup is visible in its origin structure. Toggle off restores the full
    // tree. The active state is mirrored on the button so it reads as "on".
    const publishedFilterBtn = makeToolbarButton({
        icon: TOOLBAR_ICONS.publishedFilter,
        title: "Show only published setups (toggle)",
        onClick: () => {
            publishedOnly = !publishedOnly;
            publishedFilterBtn.classList.toggle("koolook-icon-btn-active", publishedOnly);
            rerenderTree();
        },
    });
    // Seed the highlight from the persisted module flag: the panel is rebuilt
    // on Compare enter/exit, swap, etc., and `publishedOnly` survives those, so
    // without this the button would render un-highlighted while the tree is
    // still filtered — and the next click would invert the real state.
    publishedFilterBtn.classList.toggle("koolook-icon-btn-active", publishedOnly);
    toolsRow.appendChild(publishedFilterBtn);

    container.appendChild(toolsRow);

    const dividerBeforeSearch = document.createElement("div");
    dividerBeforeSearch.className = "koolook-tree-divider";
    container.appendChild(dividerBeforeSearch);

    // ---- Row 1: Search ----
    const searchRow = document.createElement("div");
    searchRow.className = "koolook-search-row";

    const searchWrap = document.createElement("div");
    searchWrap.className = "koolook-search-wrap";

    const searchIcon = document.createElement("span");
    searchIcon.className = "pi pi-search koolook-search-icon";
    searchWrap.appendChild(searchIcon);

    search = document.createElement("input");
    search.type = "search";
    search.className = "koolook-search";
    search.placeholder = "Search nodes & workflows...";
    searchWrap.appendChild(search);

    searchRow.appendChild(searchWrap);
    container.appendChild(searchRow);

    // Divider between the search field and the Nodes action bar — gives the
    // search field its own visual zone instead of jamming it against the
    // first action row beneath it.
    const dividerAfterSearch = document.createElement("div");
    dividerAfterSearch.className = "koolook-tree-divider";
    container.appendChild(dividerAfterSearch);

    // ---- Row 2: Nodes action bar ----
    const nodesRow = document.createElement("div");
    nodesRow.className = "koolook-actions-row";

    const nodesLabel = document.createElement("span");
    nodesLabel.className = "koolook-actions-label";
    nodesLabel.textContent = "Nodes";
    nodesRow.appendChild(nodesLabel);

    // Segmented mode toggle: [📦 by-pack] [🌐 by-category]. The active mode
    // is highlighted; click switches and re-renders. The choice persists in
    // localStorage (`GROUP_MODE_KEY`) and survives reloads. We listen for
    // storage events further down so a second tab updates in lockstep.
    const modeToggle = document.createElement("div");
    modeToggle.className = "koolook-mode-toggle";

    function makeModeBtn(modeId, icon, title) {
        const btn = document.createElement("button");
        btn.className = "koolook-mode-toggle-btn";
        btn.title = title;
        btn.setAttribute("aria-label", title);
        btn.dataset.mode = modeId;
        btn.appendChild(makeIconElement(icon));
        btn.addEventListener("click", () => {
            if (loadGroupMode() === modeId) return;
            saveGroupMode(modeId);
            refreshModeToggle();
            rerenderTree();
        });
        return btn;
    }

    const repoModeBtn = makeModeBtn(
        "repo",
        TOOLBAR_ICONS.repoMode,
        "Group by pack — each repo's nodes under their original category subtree.",
    );
    const categoryModeBtn = makeModeBtn(
        "category",
        TOOLBAR_ICONS.categoryMode,
        "Group by theme — picks regrouped by category theme (e.g. all image nodes together) regardless of source pack.",
    );

    function refreshModeToggle() {
        const m = loadGroupMode();
        repoModeBtn.classList.toggle("koolook-mode-active", m === "repo");
        categoryModeBtn.classList.toggle("koolook-mode-active", m === "category");
    }
    refreshModeToggle();

    modeToggle.appendChild(repoModeBtn);
    modeToggle.appendChild(categoryModeBtn);
    nodesRow.appendChild(modeToggle);

    const addBtn = document.createElement("button");
    // Same height as the icon-bar buttons (toolbar pi-* glyphs) — uses an
    // explicit `pi pi-plus` icon at the same font-size rather than a 16px "+"
    // text glyph that sat taller than the rest of the row. The dusty-green
    // accent class flags it as the primary action in the Nodes row.
    addBtn.className = "koolook-add-btn koolook-icon-btn koolook-add-btn-green";
    const addBtnIcon = document.createElement("i");
    addBtnIcon.className = "pi pi-plus";
    addBtnIcon.setAttribute("aria-hidden", "true");
    addBtn.appendChild(addBtnIcon);
    addBtn.title = "Add the selected canvas node(s) to favorites";
    addBtn.setAttribute("aria-label", "Add the selected canvas node(s) to favorites");
    addBtn.addEventListener("click", () => {
        const types = getSelectedNodeTypes();
        if (types.length === 0) {
            toast("Select a node on the canvas first.");
            return;
        }
        let added = 0;
        let duplicates = 0;
        let failed = 0;
        const successfulTypes = [];
        for (const t of types) {
            const status = addToMyPicks(t);
            if (status === "added") added += 1;
            else if (status === "duplicate") duplicates += 1;
            else failed += 1;
            // Spotlight even on duplicates — the user clicked + with this node
            // selected; reminding them where it lives is the whole feature.
            if (status !== "failed") successfulTypes.push(t);
        }
        spotlightAddedPicks(successfulTypes);
        if (added > 0) {
            const noun = added === 1 ? "node" : "nodes";
            toast(`Added ${added} ${noun} to favorites.`);
            notifyPicksChanged();
        } else if (duplicates > 0 && failed === 0) {
            toast("Already in favorites.");
            // Re-render anyway so the spotlight effect lands even on pure-
            // duplicate clicks. notifyPicksChanged is the agreed-upon trigger
            // for any sidebar refresh, even when picks didn't actually change.
            notifyPicksChanged();
        }
        if (failed > 0) {
            toast(`Failed to save ${failed} pick${failed === 1 ? "" : "s"}. See console.`);
        }
    });
    nodesRow.appendChild(addBtn);

    // Daily-use Nodes row keeps only the Add (+) button — Export and
    // Install-missing have been promoted up to the dedicated Tools row above
    // the search field (they're admin/advanced operations the typical user
    // shouldn't trigger from the everyday toolbar).

    container.appendChild(nodesRow);

    // Divider between the two action bars
    const dividerBetweenBars = document.createElement("div");
    dividerBetweenBars.className = "koolook-tree-divider";
    container.appendChild(dividerBetweenBars);

    // ---- Row 3: Workflows action bar ----
    const wfRow = document.createElement("div");
    wfRow.className = "koolook-actions-row";

    const wfLabel = document.createElement("span");
    wfLabel.className = "koolook-actions-label";
    wfLabel.textContent = "Workflows";
    wfRow.appendChild(wfLabel);

    // Top-level directory creation lives on right-click of the "Workflows"
    // section header (see `workflowsRootContextMenu`). The action bar below
    // is reserved for save actions only — keeping it homogeneous so beginners
    // aren't asked to mentally separate "save the canvas" from "make a
    // folder" in the same toolbar.

    // Shared save handler for both buttons. Uses persistMutation so the cache
    // mutation rolls back automatically if both /userdata and the localStorage
    // fallback rejected the write — the user isn't told a save succeeded when
    // nothing was persisted, and the in-memory cache stays consistent with disk.
    //
    // `asModule` rides the same persistMutation so a commit failure rolls
    // back BOTH the entry write and the tag add. Doing the addTag in a
    // separate persistMutation would race: the save could land while the
    // tag rejected, leaving a "module" entry the user thinks is tagged
    // but isn't.
    const saveAndToast = async (graph, name, dirPath, asModule = false) => {
        // Pin the workflows section + every ancestor of the destination dir
        // so the resulting re-render leaves the whole path open. Pins are
        // consumed on the next render.
        const pinKeys = [SECTION_ID_WORKFLOWS];
        let cur = SECTION_ID_WORKFLOWS;
        for (const seg of dirPath) {
            cur = `${cur}/${seg}`;
            pinKeys.push(cur);
        }
        pinExpanded(pinKeys);
        const dirDisplay = dirPath.join(" / ");
        await persistMutation({
            mutate: () => {
                const result = saveWorkflowEntry(dirPath, name, graph, { module: asModule });
                if (!result) return false;
                if (asModule) addTag(dirPath, name, MODULE_TAG);
                return result;
            },
            onSuccess: (result) => {
                const moduleSuffix = asModule ? " as module" : "";
                if (result.archivedAs) {
                    toast(`Saved "${name}" in ${dirDisplay}${moduleSuffix}. Previous version moved to Archive.`);
                } else {
                    toast(`Saved "${name}" in ${dirDisplay}${moduleSuffix}.`);
                }
            },
            persistFailedMessage: `Save failed — could not write "${name}". See console.`,
        });
    };

    wfRow.appendChild(makeToolbarButton({
        icon: TOOLBAR_ICONS.saveWorkflow,
        title: "Save entire canvas as a workflow",
        onClick: () => {
            // Check emptiness first so a serialize() throw doesn't get
            // misreported as "Canvas is empty" — distinct toasts for distinct
            // failure modes.
            if (!canvasIsNonEmpty()) {
                toast("Canvas is empty.");
                return;
            }
            const graph = serializeFullCanvas();
            if (!graph || !graph.nodes || graph.nodes.length === 0) {
                toast("Failed to serialize canvas. See console.");
                return;
            }
            showSaveWorkflowModal({
                titleSuffix: "entire canvas",
                // Whole-canvas saves default to NOT being modules — the
                // typical "save my whole workflow" intent is to keep the
                // load-replaces-canvas semantics. The checkbox is still
                // visible so a power user can opt in.
                defaultModule: false,
                onSave: ({ name, dirPath, asModule }) => saveAndToast(graph, name, dirPath, asModule),
            });
        },
    }));

    wfRow.appendChild(makeToolbarButton({
        iconClass: "pi pi-objects-column",
        title: "Save current selection as a workflow",
        onClick: () => {
            const result = serializeSelection();
            if (result.kind === "empty") {
                toast("Select one or more nodes on the canvas first.");
                return;
            }
            if (result.kind === "stale") {
                // Selection set is non-empty but every id in it points at a
                // deleted node — typically after an undo or a delete-then-
                // change-tab sequence. Generic "select one or more" was
                // misleading because the user *had* selected something; the
                // canvas just doesn't have it anymore.
                toast("Selected node(s) no longer exist. Click a node on the canvas to re-select.");
                return;
            }
            const { graph } = result;
            showSaveWorkflowModal({
                titleSuffix: `${graph.nodes.length} selected node${graph.nodes.length === 1 ? "" : "s"}`,
                // Selection saves are the canonical "module" candidate —
                // small clusters the user wants to splice into other
                // workflows. Pre-check the box; the user can untick if
                // they'd rather have replace-on-load semantics.
                defaultModule: true,
                onSave: ({ name, dirPath, asModule }) => saveAndToast(graph, name, dirPath, asModule),
            });
        },
    }));

    container.appendChild(wfRow);

    // Divider between the workflows action bar and the list below
    const dividerBeforeTree = document.createElement("div");
    dividerBeforeTree.className = "koolook-tree-divider";
    container.appendChild(dividerBeforeTree);

    // ---- Tree (scrollable) ----
    tree = document.createElement("div");
    tree.className = "koolook-tree";
    container.appendChild(tree);

    withSource(() => renderTree({ treeEl: tree, query: "" }));

    const updateFooter = document.createElement("div");
    updateFooter.className = "koolook-update-footer";
    container.appendChild(updateFooter);
    if (showUpdateFooter) {
        checkForUpdate().then((update) => renderUpdateFooter(updateFooter, update));
    }

    // ---- GitHub discovery nudge ----
    // A discreet line directly below the update footer. Always shown in the
    // live panel (gated on the same `showUpdateFooter` flag so the read-only
    // compare columns stay chrome-free). Ko-fi/funding deliberately lives in
    // the GitHub repo only — this surface stays limited to the discovery ask.
    if (showUpdateFooter) {
        const starFooter = document.createElement("div");
        starFooter.className = "koolook-star-footer";
        const starGlyph = document.createElement("span");
        starGlyph.className = "koolook-star-glyph";
        starGlyph.textContent = "★";
        starGlyph.setAttribute("aria-hidden", "true");
        const starText = document.createElement("span");
        starText.textContent = "Help creators find us on ";
        const starLink = document.createElement("a");
        starLink.href = GITHUB_REPO_URL;
        starLink.target = "_blank";
        starLink.rel = "noopener noreferrer";
        starLink.textContent = "GitHub";
        starLink.title = "Help creators find Kforge Labs on GitHub";
        starText.append(starLink);
        starFooter.append(starGlyph, starText);
        container.appendChild(starFooter);
    }

    // ---- Build tag (dev-sync verification) ----
    // `scripts/sync_to_dev.py` writes `web/_dev_build.json` post-sync so the
    // maintainer can eyeball whether the live ComfyUI is running the latest
    // synced code. Absent on registry installs and plain git checkouts —
    // silently renders nothing. Cache-bust query param so a re-sync's new
    // mtime reaches the browser without a hard refresh.
    const buildTag = document.createElement("div");
    buildTag.className = "koolook-build-tag";
    container.appendChild(buildTag);
    fetch(new URL("../_dev_build.json", import.meta.url).href + `?t=${Date.now()}`)
        .then(r => (r.ok ? r.json() : null))
        .then(info => {
            if (!info) return;
            // Layout, top-to-bottom:
            //   dev <SHA>  · <time>     ← line 1: identifier + timestamp
            //   <scope>                 ← line 2: human-readable purpose
            // SHA gets its own span (13px monospace) — the at-a-glance
            // identifier when comparing chat history with the live footer.
            // Scope renders as a block in proportional italic so it reads
            // as prose, not as part of the build identifier.
            buildTag.textContent = "";
            buildTag.appendChild(document.createTextNode("dev "));
            if (info.commit) {
                const shaEl = document.createElement("span");
                shaEl.className = "koolook-build-sha";
                shaEl.textContent = info.commit;
                buildTag.appendChild(shaEl);
            }
            if (info.synced_at) {
                buildTag.appendChild(document.createTextNode(` · ${info.synced_at}`));
            }
            if (info.scope) {
                const scopeEl = document.createElement("span");
                scopeEl.className = "koolook-build-scope";
                scopeEl.textContent = info.scope;
                buildTag.appendChild(scopeEl);
            }
        })
        .catch(() => { /* not in a dev install — leave empty */ });

    // ---- Search wiring ----
    let debounce = null;
    search.addEventListener("input", (e) => {
        const q = e.target.value;
        if (debounce) clearTimeout(debounce);
        debounce = setTimeout(() => withSource(() => renderTree({ treeEl: tree, query: q })), 60);
    });

    // ---- Event subscriptions for live re-rendering ----
    // Skipped in compare mode: a comparison panel shows a static snapshot, so
    // it must not re-render off live picks/workflows/storage changes (which
    // would read live state instead of the snapshot) or leak window listeners
    // across compare toggles.
    if (!compare) {
        window.addEventListener(PICKS_CHANGED_EVENT, () => renderTree({ treeEl: tree, query: search.value }), listenerOpts);
        window.addEventListener(WORKFLOWS_CHANGED_EVENT, () => renderTree({ treeEl: tree, query: search.value }), listenerOpts);
        window.addEventListener("storage", (e) => {
            if (e.key === STORAGE_KEY || e.key === WORKFLOWS_FALLBACK_KEY || e.key === GROUP_MODE_KEY) {
                renderTree({ treeEl: tree, query: search.value });
            }
        }, listenerOpts);
    }
}