feat(mobile): Thoughts in the mobile menu + full nav drawer on secondary pages

- Chat page: add "💭 Thoughts" to the mobile slide-out menu (with /thoughts handler),
  grouped with Journal. Thoughts was the one page mobile couldn't reach.
- nav.js: on mobile, secondary pages (Thoughts/Journal/Mind/Session/History/Hands/
  Logs) now get a ☰ slide-in drawer with the full nav + Settings — matching the
  desktop sidebar. Gated to pages without their own mobile menu, so the chat page's
  tailored hamburger/tab-bar is left untouched. Shared ITEMS list = one source of truth.

Static-only (no server change). 77 tests green.

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

lyra/web/static/index.html

@@ -41,9 +41,10 @@
       <h4>Actions</h4>
       <button id="mobileSessionBtn">🎬 Session HUD</button>
       <button id="mobileHistoryBtn">📚 Past Sessions</button>
+      <button id="mobileThoughtsBtn">💭 Thoughts</button>
+      <button id="mobileJournalBtn">📔 Journal</button>
       <button id="mobileThinkingStreamBtn">📜 Live Log (inline)</button>
       <button id="mobileFullLogBtn">⛶ Full Log</button>
-      <button id="mobileJournalBtn">📔 Journal</button>
       <button id="mobileSettingsBtn">⚙ Settings</button>
       <button id="mobileToggleThemeBtn">🌙 Toggle Theme</button>
       <button id="mobileForceReloadBtn">🔄 Force Reload</button>
@@ -1203,6 +1204,9 @@
       document.getElementById("mobileHistoryBtn").addEventListener("click", () => {
         closeMobileMenu(); window.location.href = "/history";
       });
+      document.getElementById("mobileThoughtsBtn").addEventListener("click", () => {
+        closeMobileMenu(); window.location.href = "/thoughts";
+      });
 
       // Connect to the global live log on page load.
       connectThinkingStream();

lyra/web/static/nav.js

@@ -1,6 +1,7 @@
 /* Shared app navigation — one source of truth across all pages (no build step).
-   Injects a left sidebar on desktop (>=769px) with active-page highlighting; stays
-   out of the way on mobile, where each page keeps its bottom bar / back-links. */
+   Desktop (>=769px): a fixed left sidebar. Mobile (<=768px): a slide-in drawer
+   behind a ☰ button — but ONLY on pages that don't already ship their own mobile
+   menu (the chat page has its own hamburger + tab bar, so we leave it alone). */
 (function () {
   const ITEMS = [
     { href: "/",        icon: "💬", label: "Chat" },
@@ -21,34 +22,45 @@
     return path === href || path.indexOf(href + "/") === 0;
   }
 
+  // Visual styling (all sizes); positioning differs per breakpoint below.
   const css = `
-    #app-nav { display: none; }
+    #app-nav { display: none; flex-direction: column; gap: 2px; box-sizing: border-box;
+      padding: 14px 10px; background: #0b0b0b; border-right: 1px solid #2a1d12;
+      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
+    #app-nav .brand { display: flex; align-items: center; gap: 8px; text-decoration: none;
+      color: #ff7a00; font-weight: 700; font-size: 1.15rem; letter-spacing: .5px; padding: 6px 11px 14px; }
+    #app-nav .brand .dot { width: 8px; height: 8px; border-radius: 50%;
+      background: #8fd694; box-shadow: 0 0 8px rgba(143,214,148,.6); }
+    #app-nav .navitem { display: flex; align-items: center; gap: 11px; width: 100%; text-align: left;
+      padding: 9px 11px; border-radius: 9px; border: none; background: none; color: #cfcfcf;
+      text-decoration: none; font-size: .95rem; cursor: pointer; font-family: inherit;
+      -webkit-tap-highlight-color: transparent; }
+    #app-nav .navitem .i { font-size: 1.05rem; width: 20px; text-align: center; filter: grayscale(.3); }
+    #app-nav .navitem:hover { background: rgba(255,122,0,.08); color: #fff; }
+    #app-nav .navitem.active { background: rgba(255,122,0,.14); color: #ff7a00; }
+    #app-nav .navitem.active .i { filter: none; }
+    #app-nav .spacer { flex: 1; }
+    #app-nav-burger { display: none; }
+    #app-nav-scrim { display: none; }
+
     @media screen and (min-width: 769px) {
       body { padding-left: 212px; }
-      #app-nav {
-        position: fixed; left: 0; top: 0; bottom: 0; width: 212px; z-index: 1000;
-        display: flex; flex-direction: column; gap: 2px; box-sizing: border-box;
-        padding: 14px 10px; background: #0b0b0b; border-right: 1px solid #2a1d12;
-        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
-      }
-      #app-nav .brand {
-        display: flex; align-items: center; gap: 8px; text-decoration: none;
-        color: #ff7a00; font-weight: 700; font-size: 1.15rem; letter-spacing: .5px;
-        padding: 6px 11px 14px;
-      }
-      #app-nav .brand .dot { width: 8px; height: 8px; border-radius: 50%;
-        background: #8fd694; box-shadow: 0 0 8px rgba(143,214,148,.6); }
-      #app-nav .navitem {
-        display: flex; align-items: center; gap: 11px; width: 100%; text-align: left;
-        padding: 9px 11px; border-radius: 9px; border: none; background: none;
-        color: #cfcfcf; text-decoration: none; font-size: .95rem; cursor: pointer;
-        font-family: inherit; -webkit-tap-highlight-color: transparent;
-      }
-      #app-nav .navitem .i { font-size: 1.05rem; width: 20px; text-align: center; filter: grayscale(.3); }
-      #app-nav .navitem:hover { background: rgba(255,122,0,.08); color: #fff; }
-      #app-nav .navitem.active { background: rgba(255,122,0,.14); color: #ff7a00; }
-      #app-nav .navitem.active .i { filter: none; }
-      #app-nav .spacer { flex: 1; }
+      #app-nav { display: flex; position: fixed; left: 0; top: 0; bottom: 0; width: 212px; z-index: 1000; }
+    }
+
+    @media screen and (max-width: 768px) {
+      body.lyra-nav-mobile #app-nav-burger { display: flex; align-items: center; justify-content: center;
+        position: fixed; top: calc(env(safe-area-inset-top) + 8px); right: 10px; z-index: 1301;
+        width: 40px; height: 40px; border-radius: 10px; border: 1px solid #2a1d12;
+        background: rgba(14,14,14,.92); color: #ff7a00; font-size: 1.2rem; cursor: pointer;
+        -webkit-tap-highlight-color: transparent; backdrop-filter: blur(4px); }
+      body.lyra-nav-mobile #app-nav { display: flex; position: fixed; left: 0; top: 0; bottom: 0;
+        width: 240px; max-width: 80vw; transform: translateX(-100%); transition: transform .22s ease;
+        z-index: 1310; padding-top: calc(env(safe-area-inset-top) + 14px); overflow-y: auto; }
+      body.lyra-nav-mobile #app-nav.open { transform: translateX(0); }
+      body.lyra-nav-mobile #app-nav-scrim.show { display: block; position: fixed; inset: 0;
+        background: rgba(0,0,0,.5); z-index: 1305; }
+      #app-nav .navitem { padding: 12px 11px; font-size: 1rem; }
     }`;
 
   const style = document.createElement("style");
@@ -74,4 +86,24 @@
     if (btn) btn.click();
     else location.href = "/?settings=1";
   });
+
+  // Mobile drawer — only on pages without their own mobile menu (i.e., not the chat page).
+  if (!document.getElementById("hamburgerMenu")) {
+    document.body.classList.add("lyra-nav-mobile");
+    const burger = document.createElement("button");
+    burger.id = "app-nav-burger";
+    burger.type = "button";
+    burger.setAttribute("aria-label", "Menu");
+    burger.textContent = "☰";
+    const scrim = document.createElement("div");
+    scrim.id = "app-nav-scrim";
+    document.body.appendChild(burger);
+    document.body.appendChild(scrim);
+    const close = function () { nav.classList.remove("open"); scrim.classList.remove("show"); };
+    burger.addEventListener("click", function () {
+      nav.classList.toggle("open"); scrim.classList.toggle("show");
+    });
+    scrim.addEventListener("click", close);
+    nav.addEventListener("click", function (e) { if (e.target.closest("a")) close(); });
+  }
 })();