fix(types): clean type fixes across 92 files

Apply proper TypeScript type corrections without any unsafe casts:
- Fix unknown/never/{} types from decompilation
- Correct function signatures and parameter types
- Add missing type declarations and interfaces
- Fix Ink component prop types
- Update API client/provider type annotations

Test files with mock data casts are included as-is (acceptable pattern).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/GlobalSearchDialog.tsx

@@ -256,7 +256,7 @@ export function GlobalSearchDialog({
       direction="up"
       previewPosition={previewOnRight ? 'right' : 'bottom'}
       onQueryChange={handleQueryChange}
-      onFocus={setFocused}
+      onFocus={m => setFocused(m)}
       onSelect={handleOpen}
       onTab={{ action: 'mention', handler: m => handleInsert(m, true) }}
       onShiftTab={{