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.

migrations/044_warroom_message_deleted.sql

@@ -0,0 +1,7 @@
+-- Soft-delete for War Room messages
+ALTER TABLE warroom_messages
+  ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ;
+
+CREATE INDEX IF NOT EXISTS warroom_messages_room_deleted
+  ON warroom_messages (room_id, deleted_at)
+  WHERE deleted_at IS NOT NULL;