chore: Remove unused imports across modules

Removes unused import statements identified after the major refactoring of the AI service layer and other components. This cleanup improves code clarity and removes unnecessary dependencies.

Unused imports removed from:

- **`mcp-server/src/core/direct-functions/analyze-task-complexity.js`:**

    - Removed `path`

- **`mcp-server/src/core/direct-functions/complexity-report.js`:**

    - Removed `path`

- **`mcp-server/src/core/direct-functions/expand-all-tasks.js`:**

    - Removed `path`, `fs`

- **`mcp-server/src/core/direct-functions/generate-task-files.js`:**

    - Removed `path`

- **`mcp-server/src/core/direct-functions/parse-prd.js`:**

    - Removed `os`, `findTasksJsonPath`

- **`mcp-server/src/core/direct-functions/update-tasks.js`:**

    - Removed `isSilentMode`

- **`mcp-server/src/tools/add-task.js`:**

    - Removed `createContentResponse`, `executeTaskMasterCommand`

- **`mcp-server/src/tools/analyze.js`:**

    - Removed `getProjectRootFromSession` (as `projectRoot` is now required in args)

- **`mcp-server/src/tools/expand-task.js`:**

    - Removed `path`

- **`mcp-server/src/tools/initialize-project.js`:**

    - Removed `createContentResponse`

- **`mcp-server/src/tools/parse-prd.js`:**

    - Removed `findPRDDocumentPath`, `resolveTasksOutputPath` (logic moved or handled by `resolveProjectPaths`)

- **`mcp-server/src/tools/update.js`:**

    - Removed `getProjectRootFromSession` (as `projectRoot` is now required in args)

- **`scripts/modules/commands.js`:**

    - Removed `exec`, `readline`

    - Removed AI config getters (`getMainModelId`, etc.)

    - Removed MCP helpers (`getMcpApiKeyStatus`)

- **`scripts/modules/config-manager.js`:**

    - Removed `ZodError`, `readJSON`, `writeJSON`

- **`scripts/modules/task-manager/analyze-task-complexity.js`:**

    - Removed AI config getters (`getMainModelId`, etc.)

- **`scripts/modules/task-manager/expand-all-tasks.js`:**

    - Removed `fs`, `path`, `writeJSON`

- **`scripts/modules/task-manager/models.js`:**

    - Removed `VALID_PROVIDERS`

- **`scripts/modules/task-manager/update-subtask-by-id.js`:**

    - Removed AI config getters (`getMainModelId`, etc.)

- **`scripts/modules/task-manager/update-tasks.js`:**

    - Removed AI config getters (`getMainModelId`, etc.)

- **`scripts/modules/ui.js`:**

    - Removed `getDebugFlag`

- **`scripts/modules/utils.js`:**

    - Removed `ZodError`

scripts/modules/config-manager.js

@@ -2,14 +2,7 @@ import fs from 'fs';
 import path from 'path';
 import chalk from 'chalk';
 import { fileURLToPath } from 'url';
-import { ZodError } from 'zod';
-import {
-	log,
-	readJSON,
-	writeJSON,
-	resolveEnvVariable,
-	findProjectRoot
-} from './utils.js';
+import { log, resolveEnvVariable, findProjectRoot } from './utils.js';
 
 // Calculate __dirname in ESM
 const __filename = fileURLToPath(import.meta.url);