feat(tracker): disable Ralph Wiggum tracker by default, auto-enable on detection

The InnerLoopTracker is now disabled by default and auto-enables when
Ralph-related patterns are detected:
- /ralph-loop command
- <promise>PHRASE</promise> completion phrases
- TodoWrite tool usage
- Iteration patterns (Iteration 5/50, [5/50])
- Todo checkboxes (- [ ]/- [x]) or indicator icons

This reduces noise for sessions that don't use Ralph loops while
maintaining full functionality when loops are detected.

Changes:
- Add `enabled` property to InnerLoopState type
- Add enable()/disable() methods to InnerLoopTracker
- Implement shouldAutoEnable() for pattern detection
- Update frontend to show "Tracking" status when enabled
- Add CSS for tracking state indicator
- Update CLAUDE.md documentation
- Add comprehensive tests for auto-enable behavior

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/web/public/app.js

@@ -1919,10 +1919,12 @@ class ClaudemanApp {
     const state = this.innerStates.get(this.activeSessionId);
 
     // Check if there's anything to show
+    // Only show panel if tracker is enabled OR there's active state to display
+    const isEnabled = state?.loop?.enabled === true;
     const hasLoop = state?.loop?.active || state?.loop?.completionPhrase;
     const hasTodos = state?.todos?.length > 0;
 
-    if (!hasLoop && !hasTodos) {
+    if (!isEnabled && !hasLoop && !hasTodos) {
       panel.style.display = 'none';
       return;
     }
@@ -1996,7 +1998,7 @@ class ClaudemanApp {
     const statusText = badge?.querySelector('.ralph-status-text');
     if (!badge || !statusText) return;
 
-    badge.classList.remove('active', 'completed');
+    badge.classList.remove('active', 'completed', 'tracking');
 
     if (loop?.active) {
       badge.classList.add('active');
@@ -2004,6 +2006,9 @@ class ClaudemanApp {
     } else if (loop?.completionPhrase && !loop?.active) {
       badge.classList.add('completed');
       statusText.textContent = 'Complete';
+    } else if (loop?.enabled) {
+      badge.classList.add('tracking');
+      statusText.textContent = 'Tracking';
     } else {
       statusText.textContent = 'Idle';
     }

src/web/public/styles.css

@@ -556,6 +556,10 @@ body {
   background: var(--green);
 }
 
+.ralph-status-badge.tracking .ralph-status-dot {
+  background: var(--yellow);
+}
+
 @keyframes ralph-pulse {
   0%, 100% { opacity: 1; transform: scale(1); }
   50% { opacity: 0.6; transform: scale(1.2); }