Add War Room voice meeting, fix chat overlay, and ship 5 cyan UI themes.

Voice Room lets humans talk with agents via Whisper/TTS; chat typing no longer blocked by a full-screen overlay, attachments/avatars are larger, and Settings exposes five vivid mid-dark cyan/blue themes for the whole cockpit.

cockpit/app/routes/settings.py

@@ -13,7 +13,7 @@ templates = Jinja2Templates(directory=str(BASE_DIR / "templates"))
 
 @router.get("/settings")
 async def settings_page(request: Request, tab: str = "email"):
-    allowed = ("email", "general", "permissions", "social", "users")
+    allowed = ("email", "general", "themes", "permissions", "social", "users")
     active = tab if tab in allowed else "email"
     if tab == "ai":
         active = "email"