feat(cli): migrate console calls to debugLogger and stdioHelpers (M3 Phase 7-9)

Route CLI console.* calls to structured logging:
- Debug/internal diagnostics → debugLogger (logfile)
- User-facing output → writeStdoutLine/writeStderrLine/clearScreen (stdioHelpers)
- Add stdioHelpers.ts with writeStdoutLine, writeStderrLine, clearScreen
- Migrate pre-session files (gemini.tsx, sandbox.ts, config.ts) to stdioHelpers
- Migrate extension/MCP commands to stdioHelpers
- Migrate non-interactive session/control to debugLogger
- Migrate UI hooks and components to debugLogger

packages/cli/src/ui/utils/CodeColorizer.tsx

@@ -21,9 +21,11 @@ import {
   MINIMUM_MAX_HEIGHT,
 } from '../components/shared/MaxSizedBox.js';
 import type { LoadedSettings } from '../../config/settings.js';
+import { createDebugLogger } from '@qwen-code/qwen-code-core';
 
 // Configure theming and parsing utilities.
 const lowlight = createLowlight(common);
+const debugLogger = createDebugLogger('CODE_COLORIZER');
 
 function renderHastNode(
   node: Root | Element | HastText | RootContent,
@@ -188,7 +190,7 @@ export function colorizeCode(
       </MaxSizedBox>
     );
   } catch (error) {
-    console.error(
+    debugLogger.error(
       `[colorizeCode] Error highlighting code for language "${language}":`,
       error,
     );

packages/cli/src/ui/utils/InlineMarkdownRenderer.tsx

@@ -8,6 +8,7 @@ import React from 'react';
 import { Text } from 'ink';
 import { theme } from '../semantic-colors.js';
 import stringWidth from 'string-width';
+import { createDebugLogger } from '@qwen-code/qwen-code-core';
 
 // Constants for Markdown parsing
 const BOLD_MARKER_LENGTH = 2; // For "**"
@@ -17,6 +18,8 @@ const INLINE_CODE_MARKER_LENGTH = 1; // For "`"
 const UNDERLINE_TAG_START_LENGTH = 3; // For "<u>"
 const UNDERLINE_TAG_END_LENGTH = 4; // For "</u>"
 
+const debugLogger = createDebugLogger('INLINE_MARKDOWN');
+
 interface RenderInlineProps {
   text: string;
   textColor?: string;
@@ -143,7 +146,7 @@ const RenderInlineInternal: React.FC<RenderInlineProps> = ({
         );
       }
     } catch (e) {
-      console.error('Error parsing inline markdown part:', fullMatch, e);
+      debugLogger.error('Error parsing inline markdown part:', fullMatch, e);
       renderedNode = null;
     }
 

packages/cli/src/ui/utils/clipboardUtils.ts

@@ -6,10 +6,12 @@
 
 import * as fs from 'node:fs/promises';
 import * as path from 'node:path';
-import { execCommand } from '@qwen-code/qwen-code-core';
+import { createDebugLogger, execCommand } from '@qwen-code/qwen-code-core';
 
 const MACOS_CLIPBOARD_TIMEOUT_MS = 1500;
 
+const debugLogger = createDebugLogger('CLIPBOARD_UTILS');
+
 /**
  * Checks if the system clipboard contains an image (macOS only for now)
  * @returns true if clipboard contains an image
@@ -115,7 +117,7 @@ export async function saveClipboardImage(
     // No format worked
     return null;
   } catch (error) {
-    console.error('Error saving clipboard image:', error);
+    debugLogger.error('Error saving clipboard image:', error);
     return null;
   }
 }

packages/cli/src/ui/utils/commandUtils.ts

@@ -6,6 +6,7 @@
 
 import type { SpawnOptions } from 'node:child_process';
 import { spawn } from 'node:child_process';
+import { createDebugLogger } from '@qwen-code/qwen-code-core';
 
 /**
  * Common Windows console code pages (CP) used for encoding conversions.
@@ -61,6 +62,8 @@ export const isSlashCommand = (query: string): boolean => {
   return true;
 };
 
+const debugLogger = createDebugLogger('COMMAND_UTILS');
+
 // Copies a string snippet to the clipboard for different platforms
 export const copyToClipboard = async (text: string): Promise<void> => {
   const run = (cmd: string, args: string[], options?: SpawnOptions) =>
@@ -162,7 +165,7 @@ export const getUrlOpenCommand = (): string => {
     default:
       // Default to xdg-open, which appears to be supported for the less popular operating systems.
       openCmd = 'xdg-open';
-      console.warn(
+      debugLogger.warn(
         `Unknown platform: ${process.platform}. Attempting to open URLs with: ${openCmd}.`,
       );
       break;

packages/cli/src/ui/utils/terminalSetup.ts

@@ -114,7 +114,7 @@ async function backupFile(filePath: string): Promise<void> {
     await fs.copyFile(filePath, backupPath);
   } catch (error) {
     // Log backup errors but continue with operation
-    console.warn(`Failed to create backup of ${filePath}:`, error);
+    debugLogger.warn(`Failed to create backup of ${filePath}:`, error);
   }
 }
 

packages/cli/src/ui/utils/updateCheck.ts

@@ -8,6 +8,9 @@ import type { UpdateInfo } from 'update-notifier';
 import updateNotifier from 'update-notifier';
 import semver from 'semver';
 import { getPackageJson } from '../../utils/package.js';
+import { createDebugLogger } from '@qwen-code/qwen-code-core';
+
+const debugLogger = createDebugLogger('UPDATE_CHECK');
 
 export const FETCH_TIMEOUT_MS = 2000;
 
@@ -95,7 +98,7 @@ export async function checkForUpdates(): Promise<UpdateObject | null> {
 
     return null;
   } catch (e) {
-    console.warn('Failed to check for updates: ' + e);
+    debugLogger.warn('Failed to check for updates: ' + e);
     return null;
   }
 }