feat: poker phase 2 — session recap (.md) generation, export, hands browser

Completes the poker copilot loop: talk through a session -> structured capture
-> generated writeup in Brian's format, remembered + exportable.

- poker.generate_recap(): LLM produces Brian's .md log (Session Header, Money
  Flow, Overview, Timeline, Key Hands w/ assessments, Villain Notes, Confidence
  Bank, Scar Notes, Mental Game, Final Assessment) from the session's structured
  data + the linked chat conversation; stored on poker_sessions.recap_md
- sessions now capture chat_session_id (via tool ctx) to pull the right convo;
  list_recent_hands() for browsing
- generate_recap tool ("write up the recap")
- web: /recap/{id} (renders the md) + /recap/{id}/download (.md attachment) +
  /hands browser (recent hands -> /hand/{id}); nav links added (desktop + mobile)
- tests: recap generation (stubbed), recent-hands listing

Verified live: recap for the Meadows session rendered + downloaded; all pages 200.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyra/web/static/index.html

@@ -39,6 +39,7 @@
       <button id="mobileFullLogBtn">⛶ Full Log</button>
       <button id="mobileMindBtn">🧠 Read Her Mind</button>
       <button id="mobileJournalBtn">📔 Journal</button>
+      <button id="mobileHandsBtn">🃏 Hands</button>
       <button id="mobileSettingsBtn">⚙ Settings</button>
       <button id="mobileToggleThemeBtn">🌙 Toggle Theme</button>
       <button id="mobileForceReloadBtn">🔄 Force Reload</button>
@@ -74,6 +75,7 @@
       <button id="thinkingStreamBtn" title="Show live activity log">📜 Live Log</button>
       <a id="fullLogBtn" href="/logs" target="_blank" rel="noopener" title="Open the full-page log" role="button">⛶ Full Log</a>
       <a id="mindBtn" href="/self" target="_blank" rel="noopener" title="Read her mind — Lyra's current self-state" role="button">🧠 Mind</a>
+      <a id="handsBtn" href="/hands" target="_blank" rel="noopener" title="Recorded poker hands" role="button">🃏 Hands</a>
     </div>
 
     <!-- Status -->
@@ -827,6 +829,9 @@
       document.getElementById("mobileJournalBtn").addEventListener("click", () => {
         closeMobileMenu(); window.location.href = "/journal";
       });
+      document.getElementById("mobileHandsBtn").addEventListener("click", () => {
+        closeMobileMenu(); window.location.href = "/hands";
+      });
 
       // Connect to the global live log on page load.
       connectThinkingStream();