feat(ui): implement refreshed UX for Composer layout

- Promotes refreshed multi-row status area and footer as the default experience.
- Stabilizes Composer row heights to prevent layout 'jitter' during typing and model turns.
- Unifies active hook status and model loading indicators into a single, stable Row 1.
- Refactors settings to use backward-compatible 'Hide' booleans (ui.hideStatusTips, ui.hideStatusWit).
- Removes vestigial context usage bleed-through logic in minimal mode to align with global UX direction.
- Relocates toast notifications to the top status row for improved visibility.
- Updates all CLI UI snapshots and architectural tests to reflect the stabilized layout.
- Fixes persistent TypeScript compilation errors in tests by refactoring async render helpers (`LoadingIndicator.test.tsx`, `AppHeader.test.tsx`, `ToolMessage.test.tsx`) to avoid direct destructuring of complex inferred return types, ensuring consistent Promise flattening across all CI environments (Node 20/22/24).

docs/cli/tutorials/mcp-setup.md

@@ -62,10 +62,8 @@ You tell Gemini about new servers by editing your `settings.json`.
 }
 ```
 
-<!-- prettier-ignore -->
-> [!NOTE]
-> The `command` is `docker`, and the rest are arguments passed to it. We
-> map the local environment variable into the container so your secret isn't
+> **Note:** The `command` is `docker`, and the rest are arguments passed to it.
+> We map the local environment variable into the container so your secret isn't
 > hardcoded in the config file.
 
 ## How to verify the connection