refactor: pass 3 — extract helpers, split long functions, deduplicate patterns

Backend:
- subagent-watcher: split 176L processEntry() into 5 focused methods; extract
  _resolveDescription() deduplicating 3 call sites for description acquisition
- bash-tool-parser: split 152L processCleanLine() into 4 handlers; extract
  _createActiveTool() factory and _scheduleAutoRemove() helper
- session: extract _setupOrAttachMuxSession() deduplicating ~80L between
  startInteractive/startShell; extract _handleTerminalOutput()
- respawn-controller: split 180L handleTerminalData() into 3 detection layers;
  data-driven validation loop replacing 9 individual calls
- plan-orchestrator: extract _extractJsonFromResponse(), _emitAgentFailure(),
  _formatResearchSection() helpers
- orchestrator-loop: extract _finalizeTask() unifying task completion/failure;
  _clearTimer() utility for correct clearInterval/clearTimeout dispatch
- ralph-status-parser: config-driven FIELD_PARSERS[] replacing 8 near-identical
  field-matching blocks; split updateCircuitBreaker() into focused handlers
- state-store: extract _mergeWithInitialState() and _resetCircuitBreaker()

Frontend:
- app.js: add _notifySession() helper used by 18 call sites across 5 modules
- panels-ui.js: extract _addActivityEntry() replacing 4 duplicate blocks
- settings-ui.js: extract _updateTunnelUrlRow() deduplicating 2 blocks
- ralph-panel.js, respawn-ui.js: convert to _notifySession()

Routes:
- route-helpers: add toggleService() helper
- system-routes: use toggleService() for watcher toggles; extract collectActiveTokens()
- orchestrator-routes: data-driven EVENT_MAP replacing 10 identical listeners

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

src/web/public/app.js

@@ -939,15 +939,7 @@ class CodemanApp {
     if (data.id === this.activeSessionId) {
       this.terminal.writeln(`\x1b[1;31m Error: ${data.error}\x1b[0m`);
     }
-    const session = this.sessions.get(data.id);
-    this.notificationManager?.notify({
-      urgency: 'critical',
-      category: 'session-error',
-      sessionId: data.id,
-      sessionName: session?.name || this.getShortId(data.id),
-      title: 'Session Error',
-      message: data.error || 'Unknown error',
-    });
+    this._notifySession(data.id, 'critical', 'session-error', 'Session Error', data.error || 'Unknown error');
   }
 
   _onSessionExit(data) {
@@ -960,14 +952,7 @@ class CodemanApp {
     }
     // Notify on unexpected exit (non-zero code)
     if (data.code && data.code !== 0) {
-      this.notificationManager?.notify({
-        urgency: 'critical',
-        category: 'session-crash',
-        sessionId: data.id,
-        sessionName: session?.name || this.getShortId(data.id),
-        title: 'Session Crashed',
-        message: `Exited with code ${data.code}`,
-      });
+      this._notifySession(data.id, 'critical', 'session-crash', 'Session Crashed', `Exited with code ${data.code}`);
     }
   }
 
@@ -984,15 +969,7 @@ class CodemanApp {
       const threshold = this.notificationManager?.preferences?.stuckThresholdMs || 600000;
       clearTimeout(this.idleTimers.get(data.id));
       this.idleTimers.set(data.id, setTimeout(() => {
-        const s = this.sessions.get(data.id);
-        this.notificationManager?.notify({
-          urgency: 'warning',
-          category: 'session-stuck',
-          sessionId: data.id,
-          sessionName: s?.name || this.getShortId(data.id),
-          title: 'Session Idle',
-          message: `Idle for ${Math.round(threshold / 60000)}+ minutes`,
-        });
+        this._notifySession(data.id, 'warning', 'session-stuck', 'Session Idle', `Idle for ${Math.round(threshold / 60000)}+ minutes`);
         this.idleTimers.delete(data.id);
       }, threshold));
     }
@@ -1023,15 +1000,7 @@ class CodemanApp {
       this.showToast(`Auto-cleared at ${data.tokens.toLocaleString()} tokens`, 'info');
       this.updateRespawnTokens(0);
     }
-    const session = this.sessions.get(data.sessionId);
-    this.notificationManager?.notify({
-      urgency: 'info',
-      category: 'auto-clear',
-      sessionId: data.sessionId,
-      sessionName: session?.name || this.getShortId(data.sessionId),
-      title: 'Auto-Cleared',
-      message: `Context reset at ${(data.tokens || 0).toLocaleString()} tokens`,
-    });
+    this._notifySession(data.sessionId, 'info', 'auto-clear', 'Auto-Cleared', `Context reset at ${(data.tokens || 0).toLocaleString()} tokens`);
   }
 
   _onSessionCliInfo(data) {
@@ -1983,6 +1952,18 @@ class CodemanApp {
     return this.getShortId(session.id);
   }
 
+  _notifySession(sessionId, urgency, category, title, message) {
+    const session = this.sessions.get(sessionId);
+    this.notificationManager?.notify({
+      urgency,
+      category,
+      sessionId,
+      sessionName: session?.name || this.getShortId(sessionId),
+      title,
+      message,
+    });
+  }
+
   /**
    * Clean up state from the previous session before switching tabs.
    * Handles: WebSocket teardown, CJK clear, flicker filter, tab completion,