refactor: rename verboseMode to compactMode for better UX clarity (#3075)

The "Compact Mode" label is more intuitive than "Verbose Mode" for users,
as it directly describes the default compact view experience. This change
inverts the boolean semantics (compactMode=false means show full output)
and exposes the setting in the /settings dialog (showInDialog: true).

- Rename ui.verboseMode → ui.compactMode with inverted default (false)
- Rename VerboseModeContext → CompactModeContext (file and exports)
- Rename TOGGLE_VERBOSE_MODE → TOGGLE_COMPACT_MODE in key bindings
- Update all consumer components with inverted logic
- Update i18n keys across 6 locales (verbose → compact)
- Update VS Code settings schema
- Add ui.compactMode documentation to settings.md
- Fix Ctrl+O description in keyboard-shortcuts.md

packages/cli/src/ui/components/MainContent.tsx

@@ -13,7 +13,7 @@ import { useUIState } from '../contexts/UIStateContext.js';
 import { useAppContext } from '../contexts/AppContext.js';
 import { AppHeader } from './AppHeader.js';
 import { DebugModeNotification } from './DebugModeNotification.js';
-import { useVerboseMode } from '../contexts/VerboseModeContext.js';
+import { useCompactMode } from '../contexts/CompactModeContext.js';
 
 // Limit Gemini messages to a very high number of lines to mitigate performance
 // issues in the worst case if we somehow get an enormous response from Gemini.
@@ -24,7 +24,7 @@ const MAX_GEMINI_MESSAGE_LINES = 65536;
 export const MainContent = () => {
   const { version } = useAppContext();
   const uiState = useUIState();
-  const { frozenSnapshot } = useVerboseMode();
+  const { frozenSnapshot } = useCompactMode();
   const {
     pendingHistoryItems,
     terminalWidth,