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/ui/tui/tests/plugin-shape.spec.ts

@@ -21,6 +21,7 @@ describe('dsh-tui plugin export shape', () => {
       'llm',
       'systemPrompt',
       'tokenMeter',
+      'tuiPrompt',
     ])
     expect(unwrapped.Config).toBeDefined()
     expect(typeof unwrapped.apply).toBe('function')