Cleanup worker-service.ts: remove dead code and fallback concept (#706)

* refactor(worker): remove dead code from worker-service.ts

Remove ~216 lines of unreachable code:
- Delete `runInteractiveSetup` function (defined but never called)
- Remove unused imports: fs namespace, spawn, homedir, readline,
  existsSync/writeFileSync/readFileSync/mkdirSync
- Clean up CursorHooksInstaller imports (keep only used exports)

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

* fix(worker): only enable SDK fallback when Claude is configured

Add isConfigured() method to SDKAgent that checks for ANTHROPIC_API_KEY
or claude CLI availability. Worker now only sets SDK agent as fallback
for third-party providers when credentials exist, preventing cascading
failures for users who intentionally use Gemini/OpenRouter without Claude.

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

* refactor(worker): remove misleading re-export indirection

Remove unnecessary re-export of updateCursorContextForProject from
worker-service.ts. ResponseProcessor now imports directly from
CursorHooksInstaller.ts where the function is defined. This eliminates
misleading indirection that suggested a circular dependency existed.

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

* refactor(mcp): use build-time injected version instead of hardcoded strings

Replace hardcoded '1.0.0' version strings with __DEFAULT_PACKAGE_VERSION__
constant that esbuild replaces at build time. This ensures MCP server and
client versions stay synchronized with package.json.

- worker-service.ts: MCP client version now uses packageVersion
- ChromaSync.ts: MCP client version now uses packageVersion
- mcp-server.ts: MCP server version now uses packageVersion
- Added clarifying comments for empty MCP capabilities objects

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

* feat: Implement cleanup and validation plans for worker-service.ts

- Added a comprehensive cleanup plan addressing 23 identified issues in worker-service.ts, focusing on safe deletions, low-risk simplifications, and medium-risk improvements.
- Created an execution plan for validating intentional patterns in worker-service.ts, detailing necessary actions and priorities.
- Generated a report on unjustified logic in worker-service.ts, categorizing issues by severity and providing recommendations for immediate and short-term actions.
- Introduced documentation for recent activity in the mem-search plugin, enhancing traceability and context for changes.

* fix(sdk): remove dangerous ANTHROPIC_API_KEY check from isConfigured

Claude Code uses CLI authentication, not direct API calls. Checking for
ANTHROPIC_API_KEY could accidentally use a user's API key (from other
projects) which costs 20x more than Claude Code's pricing.

Now only checks for claude CLI availability.

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

* fix(worker): remove fallback agent concept entirely

Users who choose Gemini/OpenRouter want those providers, not secret
fallback behavior. Removed setFallbackAgent calls and the unused
isConfigured() method.

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

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src/services/sync/ChromaSync.ts

@@ -18,6 +18,10 @@ import { USER_SETTINGS_PATH } from '../../shared/paths.js';
 import path from 'path';
 import os from 'os';
 
+// Version injected at build time by esbuild define
+declare const __DEFAULT_PACKAGE_VERSION__: string;
+const packageVersion = typeof __DEFAULT_PACKAGE_VERSION__ !== 'undefined' ? __DEFAULT_PACKAGE_VERSION__ : '0.0.0-dev';
+
 interface ChromaDocument {
   id: string;
   document: string;
@@ -123,9 +127,10 @@ export class ChromaSync {
 
       this.transport = new StdioClientTransport(transportOptions);
 
+      // Empty capabilities object: this client only calls Chroma tools, doesn't expose any
       this.client = new Client({
         name: 'claude-mem-chroma-sync',
-        version: '1.0.0'
+        version: packageVersion
       }, {
         capabilities: {}
       });