feat(ui): align global button thickness with main page

feat(i18n): localize system UI and move Ctrl+K to overflow

feat(ui): add visible Command Palette trigger

fix(hotkeys): remove Ctrl+K conflict with sidebar

fix(voice): add language picker for speech recognition

feat(features): add full functionality index page

fix(i18n): wire locale behavior and restyle language picker

feat(wave-13): hub w12 update, cmd palette mount, auto-title/memory hooks, PDF-RAG, audio transcribe, calendar scheduler (13 features)

feat(wave-11): command palette, dashboard, code-review, db, slides, contract, story

feat(wave6): voice TTS, share comments, tags+favorites, export+shortcuts

feat(wave5): mind-map, templates, personas marketplace, meeting mode, pinned, notes, link-preview

feat(wave4): 8 features — slash cmds, search, qr-share, /help, image gen, code sandbox, debate, cost tracker

feat: message branching + team workspace (Gist-based collab)

feat: 10+ features — voice/dragdrop/shortcuts, Ollama+RAG citations, workflows+scheduled, share password+TTL, auto-memory, export-md

feat(header): wire LocaleSwitcher (vi/en/ja)

feat: doc editor + offline mode + stats trio + i18n framework

feat(chat): persist+restore active session id across reloads

fix(model-picker): pass correct userKey for openrouter/cerebras/mistral

fix(ui): make 'Chi tiết kỹ thuật' + AB error pane scrollable on mobile

feat(providers): add OpenRouter + Cerebras + Mistral free providers

fix: drop generateImage pre-warm + add loading skeleton

fix: render generated images + fix tool-call layout overflow on mobile

feat: real provider rate-limit data via response headers

fix(model-picker): swap DropdownMenuItem for plain button on scan row

fix(model-picker): spinner + locked button while scanning

feat(composer): default AI toggles ON + toast feedback on click

fix(model-picker): show used/total with red when exhausted

feat(model-picker): shared store + rate-limit badges

fix(mobile): pin chat shell with position:fixed inset:0

fix(mobile): lock body to dvh + min-h-0 main to stop composer scroll-up

fix(auth): gate SessionProvider + CloudSyncButton behind NEXT_PUBLIC_ENABLE_CLOUD_SYNC=1

feat(message): KaTeX math rendering via remark-math + rehype-katex

feat(cloud-sync): GitHub OAuth + Upstash Redis cross-device sync (LWW)

fix(chat): pause auto-scroll when user scrolls up during streaming (stick-to-bottom only when near bottom)

fix(message): position quote button at selection focus point (where mouse released) keeps button near cursor when highlighting across list items / multi-line paragraphs

fix(quote): use getBoundingClientRect + non-empty rect fallback so '\u0026 h\u1ecfi' button appears for selections inside list items; also support touchend for mobile

feat(model-picker): live discovery for Groq + GitHub Models (parallel to Google) — 'Quét live model' button per provider

fix(model-picker): use radix --content-available-height + native overflow-y for reliable dropdown scroll

fix(tools+models): repair UTF-8 mojibake in tool descriptions; trim model list to verified-working set; filter non-chat models from Google live discovery

fix(model-picker): persist selection + scrollable dropdown for live discovery list

fix(google): remove unsupported Gemma static IDs; rely on live discovery

refactor(ui): extract ModelPicker; reuse in header + AB toggle; add reuse rule

feat(google): expand model list w/ Gemma-3 + live discovery /api/google/models

ui(error-boxes): wrap long text in ScrollArea + break-words; doc rule

ui(input/textarea): use ring-inset to avoid clipping in tight containers

ui(header): hide persona section in overflow menu on desktop (dedupe)

ui(composer): adaptive placeholder shortens based on input width

ui(composer): AI feature toggles next to context ring; pct inside circle

ui: replace 3-dot ThinkingDots with shadcn spinner (Loader2)

fix(i18n): restore Vietnamese diacritics in tool-call labels; rename edit save button to Gui