Address review feedback

- hugo.yaml: raise module.hugoVersion.min to 0.158.0, matching the new
  theme floor
- no-deprecations test: prune test-created dirs only when empty, so
  future hook files can't be deleted by test cleanup

Author: chalin

hugo.yaml

@@ -247,7 +247,7 @@ module:
   # workspace: docsy.work
   hugoVersion:
     extended: true
-    min: 0.157.0
+    min: 0.158.0
   imports:
     - path: github.com/google/docsy/theme
       disable: false

tests/no-deprecations.test.mjs

@@ -1,7 +1,13 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
 import { spawnSync } from 'node:child_process';
-import { existsSync, mkdirSync, rmSync, writeFileSync } from 'node:fs';
+import {
+  existsSync,
+  mkdirSync,
+  rmSync,
+  rmdirSync,
+  writeFileSync,
+} from 'node:fs';
 import { dirname, join } from 'node:path';
 import { fileURLToPath } from 'node:url';
 
@@ -66,7 +72,15 @@ test('build with seeded deprecated API call logs a deprecation notice', (t) => {
     );
     t.diagnostic(`Seeded deprecation reported as: ${deprecations[0].trim()}`);
   } finally {
-    rmSync(hookPath);
-    rmSync(dirname(hookPath), { recursive: true, force: true });
+    rmSync(hookPath, { force: true });
+    // Prune test-created dirs only if empty (rmdirSync refuses to delete
+    // non-empty directories), in case other hooks/partials are added later.
+    for (const dir of [dirname(hookPath), dirname(dirname(hookPath))]) {
+      try {
+        rmdirSync(dir);
+      } catch {
+        break; // Directory not empty; leave it (and its parents) in place.
+      }
+    }
   }
 });