fix: make browser tabs accessible after app restart

Two issues prevented CLI browser commands from working after restart:

1. Agent-browser daemon persists sessions across Orca restarts. The old
   session holds a stale CDP port and ignores --cdp on reuse. The
   fire-and-forget `close` raced with the first command — await it so
   the daemon forgets the session before we pass the new port.

2. Without --worktree, resolveBrowserWorktreeId returned immediately
   without activating the browser view. After restart in terminal mode,
   webviews stay unmounted (display:none) so registerGuest never fires.
   Now sends browser:activateView when no tabs are registered, triggering
   webview mount and guest registration.

src/main/browser/agent-browser-bridge.ts

@@ -1164,14 +1164,14 @@ export class AgentBrowserBridge {
       }
 
       // Why: agent-browser's daemon persists session state (including the CDP port)
-      // across Orca restarts. A stale session would try to connect to a dead port.
-      // Fire-and-forget with a short timeout — never block session creation on cleanup.
-      execFile(
-        this.agentBrowserBin,
-        ['--session', sessionName, 'close'],
-        { timeout: 3000 },
-        () => {}
-      )
+      // across Orca restarts. A stale session ignores --cdp (already initialized) and
+      // connects to the dead port. Must await close so the daemon forgets the session
+      // before we pass --cdp with the new port.
+      await new Promise<void>((resolve) => {
+        execFile(this.agentBrowserBin, ['--session', sessionName, 'close'], { timeout: 3000 }, () =>
+          resolve()
+        )
+      })
 
       const proxy = new CdpWsProxy(wc)
       const cdpEndpoint = await proxy.start()

src/main/runtime/orca-runtime.ts

@@ -1171,6 +1171,15 @@ export class OrcaRuntimeService {
   // ID so the bridge can filter tabs correctly.
   private async resolveBrowserWorktreeId(selector?: string): Promise<string | undefined> {
     if (!selector) {
+      // Why: after app restart, webviews only mount when the browser pane is visible.
+      // Without --worktree, we still need to activate the view so persisted tabs
+      // become operable via registerGuest.
+      const bridge = this.agentBrowserBridge
+      if (bridge && bridge.getRegisteredTabs().size === 0) {
+        const win = this.getAuthoritativeWindow()
+        win.webContents.send('browser:activateView', {})
+        await new Promise((resolve) => setTimeout(resolve, 500))
+      }
       return undefined
     }
     try {