merge: integrate main into dev

Resolve 9 merge conflicts preserving both sides' intent:
- nix hash, bootstrap hostnames rename, websocket-server wiring
- session.ts handler dedup, snapshot fallback, worktree registration
- worktree-session git service + script/setup features
- sidebar-workspace-list setup navigation, session-context cleanup
- workspace-registry-bootstrap test kept (code still exists)
- checkout-git test additions from both sides

Post-merge fixes: isPaneFocused prop rename, server type rebuild.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "paseo",
-  "version": "0.1.55-rc.2",
+  "version": "0.1.56",
   "private": true,
   "workspaces": [
     "packages/expo-two-way-audio",
@@ -14,6 +14,7 @@
   ],
   "scripts": {
     "dev": "./scripts/dev.sh",
+    "dev:win": "powershell ./scripts/dev.ps1",
     "dev:server": "npm run dev --workspace=@getpaseo/server",
     "dev:app": "npm run start --workspace=@getpaseo/app",
     "dev:website": "npm run dev --workspace=@getpaseo/website",
@@ -36,6 +37,7 @@
     "ios": "npm run ios --workspace=@getpaseo/app",
     "web": "npm run web --workspace=@getpaseo/app",
     "dev:desktop": "npm run dev --workspace=@getpaseo/desktop",
+    "dev:win:desktop": "npm run dev:win --workspace=@getpaseo/desktop",
     "build:desktop": "npm run version:sync-internal && npm run build:web --workspace=@getpaseo/app && npm run build --workspace=@getpaseo/desktop",
     "db:query": "npm run db:query --workspace=@getpaseo/server --",
     "cli": "npx tsx packages/cli/src/index.js",