build: Improve build efficiency and add dev mode

- Remove duplicate webui build in vscode-ide-companion (fixes double build)
- Fix misleading [watch] log messages in esbuild.js (only show in watch mode)
- Update vite-plugin-dts to ^4.5.4 for TypeScript 5.8+ support
- Update baseline-browser-mapping to ^2.9.19 to silence outdated data warnings
- Fix vitest config to use @qwen-code/qwen-code-core instead of old gemini-cli-core
- Add resolve.alias in cli vitest.config.ts for source-based testing
- Add npm run dev script for running from TypeScript source without build

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

scripts/dev.js

@@ -0,0 +1,95 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * Development entry point for Qwen Code CLI.
+ *
+ * Runs the CLI directly from TypeScript source files without requiring a build step.
+ * Changes to packages/core or packages/cli are reflected immediately.
+ *
+ * Usage: npm run dev -- [args]
+ * Example: npm run dev -- help
+ */
+
+import { spawn } from 'node:child_process';
+import { dirname, join, resolve } from 'node:path';
+import { fileURLToPath, pathToFileURL } from 'node:url';
+import { writeFileSync, mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const root = join(__dirname, '..');
+const cliPackageDir = join(root, 'packages', 'cli');
+
+// Resolve tsx from node_modules
+const tsxPath = resolve(root, 'node_modules', '.bin', 'tsx');
+
+// Entry point for the CLI
+const cliEntry = join(cliPackageDir, 'index.ts');
+
+// Create a temporary loader file
+const tmpDir = mkdtempSync(join(tmpdir(), 'qwen-dev-'));
+const loaderPath = join(tmpDir, 'loader.mjs');
+
+const coreSourcePath = join(root, 'packages', 'core', 'index.ts');
+const coreSourceUrl = pathToFileURL(coreSourcePath).href;
+
+const loaderCode = `
+import { pathToFileURL } from 'node:url';
+
+const coreSourceUrl = '${coreSourceUrl}';
+
+export function resolve(specifier, context, nextResolve) {
+  if (specifier === '@qwen-code/qwen-code-core') {
+    return {
+      shortCircuit: true,
+      url: coreSourceUrl,
+      format: 'module',
+    };
+  }
+  return nextResolve(specifier, context);
+}
+`;
+
+writeFileSync(loaderPath, loaderCode);
+
+// Create the register script that uses the new register() API
+const registerPath = join(tmpDir, 'register.mjs');
+const loaderUrl = pathToFileURL(loaderPath).href;
+const registerCode = `
+import { register } from 'node:module';
+import { pathToFileURL } from 'node:url';
+
+register('${loaderUrl}', pathToFileURL('./'));
+`;
+writeFileSync(registerPath, registerCode);
+
+const env = {
+  ...process.env,
+  DEV: 'true',
+  CLI_VERSION: 'dev',
+  NODE_ENV: 'development',
+  // Use --import with register() instead of deprecated --loader
+  NODE_OPTIONS: `--import ${pathToFileURL(registerPath).href}`,
+};
+
+const nodeArgs = [tsxPath, cliEntry, ...process.argv.slice(2)];
+
+const child = spawn('node', nodeArgs, {
+  stdio: 'inherit',
+  env,
+  cwd: process.cwd(),
+});
+
+child.on('close', (code) => {
+  // Cleanup temp directory
+  try {
+    rmSync(tmpDir, { recursive: true, force: true });
+  } catch {
+    // Ignore cleanup errors
+  }
+  process.exit(code ?? 0);
+});