fix: address PR review — TTY guard, test rename, unify debug env var

- Add process.stdin.isTTY guard before --review prompt to prevent CI hangs
- Rename misleading --verbose e2e test to reflect it checks help output
- Replace DEBUG with GITNEXUS_VERBOSE for error stack traces

Made-with: Cursor

gitnexus/src/cli/wiki.ts

@@ -339,8 +339,13 @@ export const wikiCommand = async (
       console.log(`\n  Tree saved to: ${treeFile}`);
       console.log('  You can edit this file to remove/rename modules.\n');
       
-      // Ask for confirmation
-      const answer = await prompt('  Continue with generation? (Y/n/edit): ');
+      // Ask for confirmation (auto-continue in non-interactive environments)
+      if (!process.stdin.isTTY) {
+        console.log('  Non-interactive mode — auto-continuing with generation.\n');
+      }
+      const answer = process.stdin.isTTY
+        ? await prompt('  Continue with generation? (Y/n/edit): ')
+        : 'y';
       const choice = answer.trim().toLowerCase();
       
       if (choice === 'n' || choice === 'no') {
@@ -465,7 +470,7 @@ export const wikiCommand = async (
       }
     } else {
       console.log(`\n  Error: ${err.message}\n`);
-      if (process.env.DEBUG) {
+      if (process.env.GITNEXUS_VERBOSE) {
         console.error(err);
       }
     }

gitnexus/test/integration/cli-e2e.test.ts

@@ -305,13 +305,11 @@ describe('CLI end-to-end', () => {
       expect(combined).not.toMatch(/API key:/);
     });
 
-    it('wiki --verbose sets GITNEXUS_VERBOSE env', () => {
-      // --verbose should be accepted as a valid flag (not rejected by Commander)
+    it('wiki --help includes --verbose flag description', () => {
       const result = runCliRaw(['wiki', '--help'], repoRoot);
       if (result.status === null) return;
 
       expect(result.status).toBe(0);
-      // Confirm the flag description is present
       expect(result.stdout).toMatch(/verbose/i);
     });
   });