fix: font sizes 21/25/17px, icon labels on send btn, no-wrap fix

- Sync preload script font sizes to match app.js (21/25/17px)
- Send button variants now show icons: ↑ Send, 📝 Note, ⚡ Run
- Remove fixed width on send-col; add white-space:nowrap + padding
  so "📝 Note" never wraps regardless of font size

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cortex/static/app.js

@@ -74,7 +74,7 @@
             otr:   { icon: '🔒', label: 'OTR' },
             agent: { icon: '⚡', label: 'Agent' },
         };
-        const send_labels = { chat: 'Send', note: 'Add Note', otr: 'Send', agent: 'Run' };
+        const send_labels = { chat: '↑ Send', note: '📝 Note', otr: '↑ Send', agent: '⚡ Run' };
 
         let current_mode = localStorage.getItem('current_mode') || 'chat';
         let note_public  = false;
@@ -1096,7 +1096,7 @@
         // ── Font size cycle ───────────────────────────────────────────
         const fontSizeBtn = document.getElementById('font-size-btn');
         const fontSizes   = ['normal', 'large', 'small'];
-        const fontSizePx  = { normal: '17px', large: '19px', small: '15px' };
+        const fontSizePx  = { normal: '21px', large: '25px', small: '17px' };
         const fontSizeLbl = { normal: 'Aa', large: 'A+', small: 'A−' };
 
         function applyFontSize(size) {

cortex/static/index.html

@@ -14,9 +14,9 @@
             var t = localStorage.getItem('theme');
             if (!t) t = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
             document.documentElement.setAttribute('data-theme', t);
-            var sizes = { normal: '17px', large: '19px', small: '15px' };
+            var sizes = { normal: '21px', large: '25px', small: '17px' };
             var fs = localStorage.getItem('font-size') || 'normal';
-            document.documentElement.style.fontSize = sizes[fs] || '17px';
+            document.documentElement.style.fontSize = sizes[fs] || '21px';
         })();
     </script>
     <link rel="stylesheet" href="/static/style.css">

cortex/static/style.css

@@ -626,7 +626,6 @@
             align-items: stretch;
             gap: 4px;
             flex-shrink: 0;
-            width: 80px;
         }
 
         /* Send button */
@@ -635,10 +634,11 @@
             border: 1px solid var(--user-border);
             color: var(--text);
             border-radius: 8px;
-            padding: 10px 0;
+            padding: 10px 14px;
             cursor: pointer;
             font-size: 0.9rem;
             text-align: center;
+            white-space: nowrap;
             transition: background 0.15s;
         }