feat: add Orchestrator Loop — phased plan execution with team agents

Adds a new autonomous loop that accepts high-level goals, generates
phased execution plans via AI, and executes them step-by-step with
verification gates between phases.

Core components:
- OrchestratorLoop: state machine (idle→planning→approval→executing→verifying→completed)
- OrchestratorPlanner: plan generation via PlanOrchestrator, Kahn's algorithm phase grouping
- OrchestratorVerifier: phase verification (strict/moderate/lenient modes)
- Prompt templates for phase execution, team delegation, verification, replanning

API (10 endpoints):
- POST start/approve/reject/pause/resume/stop
- GET status/plan
- POST phase/:id/skip, phase/:id/retry

Frontend: orchestrator-panel.js with SSE-driven state, phase progress, task tracking

Tests: 22 tests (18 route + 4 unit), all passing. Typecheck/lint/format clean.

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

src/web/public/app.js

@@ -235,6 +235,19 @@ const _SSE_HANDLER_MAP = [
   [SSE_EVENTS.PLAN_STARTED, '_onPlanStarted'],
   [SSE_EVENTS.PLAN_CANCELLED, '_onPlanCancelled'],
   [SSE_EVENTS.PLAN_COMPLETED, '_onPlanCompleted'],
+
+  // Orchestrator loop
+  [SSE_EVENTS.ORCHESTRATOR_STATE_CHANGED, '_onOrchestratorStateChanged'],
+  [SSE_EVENTS.ORCHESTRATOR_PLAN_READY, '_onOrchestratorPlanReady'],
+  [SSE_EVENTS.ORCHESTRATOR_PHASE_STARTED, '_onOrchestratorPhaseStarted'],
+  [SSE_EVENTS.ORCHESTRATOR_PHASE_COMPLETED, '_onOrchestratorPhaseCompleted'],
+  [SSE_EVENTS.ORCHESTRATOR_PHASE_FAILED, '_onOrchestratorPhaseFailed'],
+  [SSE_EVENTS.ORCHESTRATOR_VERIFICATION, '_onOrchestratorVerification'],
+  [SSE_EVENTS.ORCHESTRATOR_TASK_ASSIGNED, '_onOrchestratorTaskAssigned'],
+  [SSE_EVENTS.ORCHESTRATOR_TASK_COMPLETED, '_onOrchestratorTaskCompleted'],
+  [SSE_EVENTS.ORCHESTRATOR_TASK_FAILED, '_onOrchestratorTaskFailed'],
+  [SSE_EVENTS.ORCHESTRATOR_COMPLETED, '_onOrchestratorCompleted'],
+  [SSE_EVENTS.ORCHESTRATOR_ERROR, '_onOrchestratorError'],
 ];
 
 // ═══════════════════════════════════════════════════════════════
@@ -317,6 +330,10 @@ class CodemanApp {
     this.logViewerWindows = new Map(); // Map<windowId, { element, eventSource, filePath }>
     this.logViewerWindowZIndex = ZINDEX_LOG_VIEWER_BASE;
     this.projectInsightsPanelVisible = false;
+
+    // Orchestrator loop state
+    this.orchestratorState = null; // { state, plan, currentPhaseIndex, stats }
+    this.orchestratorPanelVisible = false;
     this.currentSessionWorkingDir = null; // Track current session's working dir for path normalization
 
     // Image popup windows (auto-open for detected screenshots/images)