feat: compact boundary divider, overlay fix, approval window, PiP, Tauri enhancements

- Add CompactBoundaryDivider component for compact_boundary system messages
- Fix readability overlay: v-if removes element entirely at 0% opacity
- Add approval page and window composable
- Add PiP window support and loading screen
- Tauri: add window management commands and capabilities
- Disable Ctrl+1..5 shortcuts in Tauri (handled by global shortcuts)

server/services/sync-server.ts

@@ -33,6 +33,7 @@ export function getClients() {
 
 export function startSyncServer() {
   const server = Bun.serve({
+    hostname: '0.0.0.0',
     port: PORT_GIT,
     async fetch(req, server) {
       const url = new URL(req.url)