refactor(context): migrate all imports to use index.js and fix type exports

- Update all direct imports from frame-manager.ts to use index.js
- Update type-only imports to use frame-types.ts
- Fix type exports to use `export type` for pure type definitions
  (required because esbuild strips type-only modules at runtime)
- Update tests to use new import paths:
  - FrameManager now refers to RefactoredFrameManager
  - LegacyFrameManager available for backwards compatibility tests

All code now imports FrameManager from index.js, which provides
the RefactoredFrameManager as the primary implementation.

https://claude.ai/code/session_014ojs76858uGzWb6Hrbs4VG

Author: claude

src/core/context/__tests__/context-bridge.test.ts

@@ -1,9 +1,8 @@
 import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
 import { ContextBridge, contextBridge } from '../context-bridge.js';
-import { FrameManager } from '../frame-manager.js';
+import { FrameManager, type Frame } from '../index.js';
 import { sharedContextLayer } from '../shared-context-layer.js';
 import { sessionManager } from '../../session/session-manager.js';
-import type { Frame } from '../frame-manager.js';
 
 vi.mock('../shared-context-layer.js');
 vi.mock('../../session/session-manager.js');

src/core/context/__tests__/dual-stack-manager-integration.test.ts

@@ -5,7 +5,7 @@
 
 import { describe, it, expect, beforeEach, afterEach } from 'vitest';
 import { DualStackManager } from '../dual-stack-manager.js';
-import { FrameManager } from '../frame-manager.js';
+import { FrameManager } from '../index.js';
 import { SQLiteAdapter } from '../../database/sqlite-adapter.js';
 import * as fs from 'fs';
 import * as path from 'path';

src/core/context/__tests__/frame-manager-cycle-detection.test.ts

@@ -4,17 +4,16 @@
 
 import { describe, it, expect, beforeEach } from 'vitest';
 import Database from 'better-sqlite3';
-import { FrameManager } from '../frame-manager.js';
-import { RefactoredFrameManager } from '../refactored-frame-manager.js';
+import { FrameManager, LegacyFrameManager } from '../index.js';
 import { ErrorCode } from '../../errors/index.js';
 
 describe('Frame Manager - Circular Reference Detection', () => {
   let db: Database.Database;
-  let frameManager: FrameManager;
-  
+  let frameManager: LegacyFrameManager;
+
   beforeEach(() => {
     db = new Database(':memory:');
-    frameManager = new FrameManager(db, 'test-project', {
+    frameManager = new LegacyFrameManager(db, 'test-project', {
       skipContextBridge: true,
       maxFrameDepth: 10, // Lower limit for testing
     });
@@ -24,7 +23,7 @@ describe('Frame Manager - Circular Reference Detection', () => {
     db.close();
   });
 
-  describe('FrameManager', () => {
+  describe('LegacyFrameManager', () => {
     it('should detect direct circular reference (A -> B -> A)', () => {
       // Create frame A
       const frameA = frameManager.createFrame({
@@ -214,11 +213,11 @@ describe('Frame Manager - Circular Reference Detection', () => {
     });
   });
 
-  describe('RefactoredFrameManager', () => {
-    let refactoredManager: RefactoredFrameManager;
+  describe('RefactoredFrameManager (now FrameManager)', () => {
+    let refactoredManager: FrameManager;
 
     beforeEach(() => {
-      refactoredManager = new RefactoredFrameManager(db, 'test-project', {
+      refactoredManager = new FrameManager(db, 'test-project', {
         maxStackDepth: 100, // Higher stack limit so we can test frame depth
       });
     });

src/core/context/__tests__/frame-manager.test.ts

@@ -5,7 +5,7 @@
 
 import { describe, it, expect, beforeEach, afterEach } from 'vitest';
 import Database from 'better-sqlite3';
-import { FrameManager } from '../frame-manager';
+import { FrameManager } from '../index.js';
 import { join } from 'path';
 import { mkdtempSync, rmSync } from 'fs';
 import { tmpdir } from 'os';

src/core/context/auto-context.ts

@@ -3,7 +3,7 @@
  * Automatically creates and manages context frames
  */
 
-import { FrameManager } from './frame-manager.js';
+import { FrameManager } from './index.js';
 import { logger } from '../monitoring/logger.js';
 
 export class AutoContext {

src/core/context/compaction-handler.ts

@@ -3,7 +3,8 @@
  * Preserves critical context across token limit boundaries
  */
 
-import { FrameManager, Anchor, Event } from './frame-manager.js';
+import { FrameManager } from './index.js';
+import type { Anchor, Event } from './index.js';
 import { logger } from '../monitoring/logger.js';
 
 export interface CompactionMetrics {

src/core/context/context-bridge.ts

@@ -7,11 +7,10 @@
  * - Maintains consistency across sessions
  */
 
-import { FrameManager } from './frame-manager.js';
+import { FrameManager, type Frame } from './index.js';
 import { sharedContextLayer } from './shared-context-layer.js';
 import { sessionManager } from '../session/session-manager.js';
 import { logger } from '../monitoring/logger.js';
-import type { Frame } from './frame-manager.js';
 
 export interface BridgeOptions {
   autoSync: boolean;

src/core/context/dual-stack-manager.ts

@@ -3,8 +3,8 @@
  * Manages both individual and shared team stacks for collaboration
  */
 
-import type { Frame, Event, Anchor } from './frame-manager.js';
-import { FrameManager } from './frame-manager.js';
+import type { Frame, Event, Anchor } from './frame-types.js';
+import { FrameManager } from './index.js';
 import type { DatabaseAdapter } from '../database/database-adapter.js';
 import { SQLiteAdapter } from '../database/sqlite-adapter.js';
 import { logger } from '../monitoring/logger.js';

src/core/context/enhanced-rehydration.ts

@@ -6,7 +6,7 @@
 import * as fs from 'fs/promises';
 import * as path from 'path';
 import { logger } from '../monitoring/logger.js';
-import { FrameManager } from './frame-manager.js';
+import { FrameManager } from './index.js';
 import { CompactionHandler } from './compaction-handler.js';
 
 export interface FileSnapshot {

src/core/context/frame-handoff-manager.ts

@@ -3,7 +3,7 @@
  * Handles frame transfers between individual and team stacks with approval workflows
  */
 
-import type { Frame, Event, Anchor } from './frame-manager.js';
+import type { Frame, Event, Anchor } from './frame-types.js';
 import {
   DualStackManager,
   type StackContext,