fix(core): resolve nested plan directory duplication and relative path policies (#25138)

packages/cli/src/ui/components/ExitPlanModeDialog.test.tsx

@@ -159,6 +159,7 @@ Implement a comprehensive authentication system with multiple providers.
           isTrustedFolder: () => true,
           getPreferredEditor: () => undefined,
           getSessionId: () => 'test-session-id',
+          getProjectRoot: () => mockTargetDir,
           storage: {
             getPlansDir: () => mockPlansDir,
           },
@@ -466,6 +467,7 @@ Implement a comprehensive authentication system with multiple providers.
                 getIdeMode: () => false,
                 isTrustedFolder: () => true,
                 getSessionId: () => 'test-session-id',
+                getProjectRoot: () => mockTargetDir,
                 storage: {
                   getPlansDir: () => mockPlansDir,
                 },

packages/cli/src/ui/components/ExitPlanModeDialog.tsx

@@ -85,6 +85,7 @@ function usePlanContent(planPath: string, config: Config): PlanContentState {
         const pathError = await validatePlanPath(
           planPath,
           config.storage.getPlansDir(),
+          config.getProjectRoot(),
         );
         if (ignore) return;
         if (pathError) {

packages/cli/src/ui/components/ToolConfirmationQueue.test.tsx

@@ -52,6 +52,7 @@ describe('ToolConfirmationQueue', () => {
     getModel: () => 'gemini-pro',
     getDebugMode: () => false,
     getTargetDir: () => '/mock/target/dir',
+    getProjectRoot: () => '/mock/project/root',
     getFileSystemService: () => ({
       readFile: vi.fn().mockResolvedValue('Plan content'),
     }),