feat(tui): personal TUI rework, integrating upstream model reasoning-effort selection

Consolidates the personal dsh-tui customizations (module split into
components/session/extension, prompt template + running-glyph indicator,
copyable transcript, tool-card headers, timing placement, XML tool output,
status/footer rework) and ports upstream's model reasoning-effort selector
(Shift+Tab effort cycling, effort-aware /model, footer, and /status) onto
the personal module layout.

packages/examples/tui-demo/src/index.ts

@@ -131,6 +131,7 @@ export function composeTuiApp(ctx: Context, config: Config): void {
   ctx.plugin(SessionQuerySqlite, { path: join(persistenceRoot, 'session-query.db') })
   ctx.plugin(SessionReferenceService, config.sessionReferences ?? {})
   ctx.plugin(UserInteractionService)
+  ctx.plugin(uiTui.TuiPromptService)
   ctx.plugin(uiTui, {
     ...config.ui,
     ...config.welcome === undefined ? {} : { welcome: config.welcome },