Rework /scoped-models command UX

- Renamed from /models to /scoped-models
- Changes are now session-only by default (Ctrl+S to persist to settings)
- Added search with fuzzy filtering
- Hotkeys: Enter toggle, Ctrl+A enable all, Ctrl+X clear all, Ctrl+P toggle provider
- Ctrl+C clears search (or exits if empty), Escape exits
- Enabled models shown at top of list
- No checkmarks when all models enabled (no scope)
- First toggle when unscoped clears all and selects that model
- Uses current session thinking level instead of settings default
- Reads from session state first (preserves session-only changes across /scoped-models invocations)

Builds on #626

packages/coding-agent/src/modes/interactive/components/index.ts

@@ -15,8 +15,8 @@ export { ExtensionSelectorComponent } from "./extension-selector.js";
 export { FooterComponent } from "./footer.js";
 export { LoginDialogComponent } from "./login-dialog.js";
 export { ModelSelectorComponent } from "./model-selector.js";
-export { type ModelsCallbacks, type ModelsConfig, ModelsSelectorComponent } from "./models-selector.js";
 export { OAuthSelectorComponent } from "./oauth-selector.js";
+export { type ModelsCallbacks, type ModelsConfig, ScopedModelsSelectorComponent } from "./scoped-models-selector.js";
 export { SessionSelectorComponent } from "./session-selector.js";
 export { type SettingsCallbacks, type SettingsConfig, SettingsSelectorComponent } from "./settings-selector.js";
 export { ShowImagesSelectorComponent } from "./show-images-selector.js";