feat: switch project from pnpm to bun

packages/desktop/src-tauri/Cargo.lock

@@ -2847,7 +2847,7 @@ dependencies = [
 
 [[package]]
 name = "openchamber-desktop"
-version = "1.3.4"
+version = "1.3.5"
 dependencies = [
  "anyhow",
  "axum",

packages/desktop/src-tauri/tauri.conf.json

@@ -4,8 +4,8 @@
   "version": "1.3.5",
   "identifier": "ai.opencode.openchamber",
   "build": {
-    "beforeDevCommand": "pnpm dev",
-    "beforeBuildCommand": "pnpm build",
+    "beforeDevCommand": "bun run dev",
+    "beforeBuildCommand": "bun run build",
     "devUrl": "http://127.0.0.1:1421",
     "frontendDist": "../dist"
   },