feat(cli): implement stable 2-row footer layout with responsive collision handling

This commit introduces a new, more stable footer architecture that addresses
several long-standing UX issues:
- Stabilizes the layout by anchoring mode indicators and context summaries
- Protects safety indicators (YOLO/Plan) from being hidden by notifications
- Decouples ambient tips/wit from real system status to prevent confusion
- Implements intelligent collision detection for narrow terminal windows
- Keeps input visible but disabled during tool approval pauses
- Enhances visual consistency with unified status colors and hook icons

packages/cli/src/ui/AppContainer.tsx

@@ -1365,7 +1365,8 @@ Logging in with Google... Restarting Gemini CLI to continue.
     !isResuming &&
     !!slashCommands &&
     (streamingState === StreamingState.Idle ||
-      streamingState === StreamingState.Responding) &&
+      streamingState === StreamingState.Responding ||
+      streamingState === StreamingState.WaitingForConfirmation) &&
     !proQuotaRequest;
 
   const [controlsHeight, setControlsHeight] = useState(0);