test: isolate shared-state test suites for CI stability

- add dependency injection to export-command, binary-manager,
  codex-plan-compatibility, config-command, and usage-syncer
- override process.exit in api-export test to prevent silent
  termination in Bun's parallel test runner
- harden test-environment bootstrap with process.env isolation
- fix auth middleware to avoid config upgrade during checks

tests/unit/cliproxy/binary-manager-install.test.ts

@@ -1,10 +1,6 @@
-import { afterEach, describe, expect, it, mock } from 'bun:test';
+import { describe, expect, it } from 'bun:test';
 
 describe('installCliproxyVersion', () => {
-  afterEach(() => {
-    mock.restore();
-  });
-
   it('attempts to stop the proxy even when there is no tracked running session', async () => {
     const calls = {
       stopProxy: 0,
@@ -13,83 +9,33 @@ describe('installCliproxyVersion', () => {
       ensureBinary: 0,
     };
 
-    mock.module('../../../src/utils/ui', () => ({
-      info: (message: string) => message,
-      warn: (message: string) => message,
-    }));
-
-    mock.module('../../../src/cliproxy/config-generator', () => ({
-      getBinDir: () => '/tmp/ccs-bin',
-      CLIPROXY_DEFAULT_PORT: 8317,
-    }));
-
-    mock.module('../../../src/cliproxy/platform-detector', () => ({
-      DEFAULT_BACKEND: 'plus',
-      CLIPROXY_MAX_STABLE_VERSION: '9.9.999-0',
-      BACKEND_CONFIG: {
-        plus: {
-          fallbackVersion: '6.6.80',
-          repo: 'router-for-me/CLIProxyAPIPlus',
-        },
-        original: {
-          fallbackVersion: '0.0.0',
-          repo: 'router-for-me/CLIProxyAPI',
-        },
-      },
-    }));
-
-    mock.module('../../../src/cliproxy/services/proxy-lifecycle-service', () => ({
-      stopProxy: async () => {
-        calls.stopProxy += 1;
-        return { stopped: false, error: 'No active CLIProxy session found' };
-      },
-    }));
-
-    mock.module('../../../src/utils/port-utils', () => ({
-      waitForPortFree: async () => {
-        calls.waitForPortFree += 1;
-        return true;
-      },
-    }));
-
-    mock.module('../../../src/config/unified-config-loader', () => ({
-      loadOrCreateUnifiedConfig: () => ({
-        cliproxy: { backend: 'plus' },
-      }),
-    }));
-
-    mock.module('../../../src/cliproxy/binary', () => ({
-      checkForUpdates: async () => ({
-        hasUpdate: false,
-        currentVersion: '6.6.80',
-        latestVersion: '6.6.80',
-        fromCache: false,
-        checkedAt: Date.now(),
-      }),
-      deleteBinary: () => {
-        calls.deleteBinary += 1;
-      },
-      getBinaryPath: () => '/tmp/ccs-bin/plus/cliproxy',
-      isBinaryInstalled: () => false,
-      getBinaryInfo: async () => null,
-      getPinnedVersion: () => null,
-      savePinnedVersion: () => {},
-      clearPinnedVersion: () => {},
-      isVersionPinned: () => false,
-      getVersionPinPath: () => '/tmp/ccs-bin/plus/.version-pin',
-      readInstalledVersion: () => '6.6.80',
-      ensureBinary: async () => {
-        calls.ensureBinary += 1;
-        return '/tmp/ccs-bin/plus/cliproxy';
-      },
-      migrateVersionPin: () => {},
-    }));
-
     const binaryManager = await import(
       `../../../src/cliproxy/binary-manager?binary-manager-install=${Date.now()}`
     );
 
-    await binaryManager.installCliproxyVersion('6.7.1', false, 'plus');
+    await binaryManager.installCliproxyVersion('6.7.1', false, 'plus', {
+      createManager: () => ({
+        isBinaryInstalled: () => false,
+        deleteBinary: () => {
+          calls.deleteBinary += 1;
+        },
+        ensureBinary: async () => {
+          calls.ensureBinary += 1;
+          return '/tmp/ccs-bin/plus/cliproxy';
+        },
+      }),
+      stopProxyFn: async () => {
+        calls.stopProxy += 1;
+        return { stopped: false, error: 'No active CLIProxy session found' };
+      },
+      waitForPortFreeFn: async () => {
+        calls.waitForPortFree += 1;
+        return true;
+      },
+      formatInfo: (message: string) => message,
+      formatWarn: (message: string) => message,
+      getInstalledVersion: () => '6.6.80',
+    });
 
     expect(calls.stopProxy).toBe(1);
     expect(calls.waitForPortFree).toBe(0);