fix: electron-builder workspace path resolution

electron-builder resolves from/extraResources paths unreliably in npm
workspace mode. Use prepare-pack.mjs to copy root resources (config/,
public/, public-desktop/, bin/) into packages/electron/ before packing
and clean up after. Also add missing description and pin electronVersion.

packages/electron/electron-builder.yml

@@ -1,5 +1,6 @@
 appId: com.codex-proxy.app
 productName: Codex Proxy
+electronVersion: "35.7.5"
 
 publish:
   provider: github
@@ -9,26 +10,18 @@ publish:
 directories:
   output: release
 
+# Pre-pack script copies config/, public/, public-desktop/, bin/ from
+# monorepo root into this directory. Paths here are relative to projectDir.
 files:
   - dist-electron/**/*
+  - config/**/*
+  - public/**/*
+  - public-desktop/**/*
   - electron/assets/**/*
   - package.json
   - "!node_modules"
   - node_modules/koffi/**
   - "!dist"
-  # Include root-level runtime files (resolved relative to packages/electron/)
-  - from: ../../config
-    to: config
-    filter:
-      - "**/*"
-  - from: ../../public
-    to: public
-    filter:
-      - "**/*"
-  - from: ../../public-desktop
-    to: public-desktop
-    filter:
-      - "**/*"
 
 # Static assets unpacked from asar (filesystem access at runtime)
 asarUnpack:
@@ -40,7 +33,7 @@ asarUnpack:
 
 # curl-impersonate binaries as extra resources (outside asar)
 extraResources:
-  - from: ../../bin/
+  - from: bin/
     to: bin/
     filter:
       - "**/*"

packages/electron/electron/prepare-pack.mjs

@@ -0,0 +1,36 @@
+/**
+ * Copy root-level runtime resources into packages/electron/ before
+ * electron-builder runs, so all paths resolve relative to projectDir.
+ *
+ * Usage:
+ *   node electron/prepare-pack.mjs          # copy
+ *   node electron/prepare-pack.mjs --clean  # remove copies
+ */
+
+import { cpSync, rmSync, existsSync } from "fs";
+import { resolve } from "path";
+
+const ROOT = resolve(import.meta.dirname, "..", "..", "..");
+const PKG = resolve(import.meta.dirname, "..");
+
+const DIRS = ["config", "public", "public-desktop", "bin"];
+const isClean = process.argv.includes("--clean");
+
+for (const dir of DIRS) {
+  const src = resolve(ROOT, dir);
+  const dest = resolve(PKG, dir);
+
+  if (isClean) {
+    if (existsSync(dest)) {
+      rmSync(dest, { recursive: true });
+      console.log(`[prepare-pack] removed ${dir}/`);
+    }
+  } else {
+    if (!existsSync(src)) {
+      console.warn(`[prepare-pack] skipping ${dir}/ (not found at ${src})`);
+      continue;
+    }
+    cpSync(src, dest, { recursive: true });
+    console.log(`[prepare-pack] copied ${dir}/ → packages/electron/${dir}/`);
+  }
+}

packages/electron/package.json

@@ -1,16 +1,19 @@
 {
   "name": "@codex-proxy/electron",
   "version": "1.0.57",
+  "description": "Codex Proxy desktop app (Electron shell)",
   "private": true,
   "main": "dist-electron/main.cjs",
   "author": "codex-proxy",
   "scripts": {
     "build": "node electron/build.mjs",
     "dev": "cd ../.. && npm run build && cd packages/electron && npm run build && electron .",
+    "prepack": "node electron/prepare-pack.mjs",
     "pack": "npx electron-builder --config electron-builder.yml",
-    "pack:win": "npx electron-builder --config electron-builder.yml --win",
-    "pack:mac": "npx electron-builder --config electron-builder.yml --mac",
-    "pack:linux": "npx electron-builder --config electron-builder.yml --linux"
+    "postpack": "node electron/prepare-pack.mjs --clean",
+    "pack:win": "npm run prepack && npx electron-builder --config electron-builder.yml --win && npm run postpack",
+    "pack:mac": "npm run prepack && npx electron-builder --config electron-builder.yml --mac && npm run postpack",
+    "pack:linux": "npm run prepack && npx electron-builder --config electron-builder.yml --linux && npm run postpack"
   },
   "dependencies": {
     "electron-updater": "^6.3.0"