test(post-form): add edit/delete/anon coverage and fix stale photo-gate assumptions

New specs: edit-mode (ES1 save round-trip + ES2/ES3 prefill 404/500 states),
delete-flow (DEL1-3 happy/cancel/failed), anon-view (AN1 no owner controls,
AN2 draft hidden from anon), photo-editor (live add/delete/reorder). Existing:
P3-P8 now attach a photo to satisfy the create photo-gate; V3 picker cap 4->6.
Full post suite 38/38, stable across parallel (3-worker) runs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mpdu3Dt1iVoozHwAMyjrbn

tests/ui/helpers.js

@@ -8,13 +8,23 @@ const { execSync } = require('child_process');
  *
  * Resolution order:
  *  1. GRAV_USER_DIR env var (set in .env or shell)
- *  2. docker inspect the running intotheeast_grav container
- *  3. Sibling `user/` directory (worktree fallback)
+ *  2. Sibling `user/` directory — authoritative for this repo's layout, where
+ *     docker-compose always bind-mounts `./user` relative to the checkout. This
+ *     is correct for BOTH the main checkout and a git worktree (each worktree
+ *     serves its own `./user`), so it must be preferred over docker inspect.
+ *  3. `docker inspect intotheeast_grav` — last-resort fallback for running the
+ *     specs detached from the served checkout. NOTE: from a worktree this points
+ *     at the MAIN checkout's container (a different `user/`), so it must never
+ *     win over the sibling dir above, or disk assertions look in the wrong tree.
  */
 function resolveUserDir() {
     if (process.env.GRAV_USER_DIR) {
         return process.env.GRAV_USER_DIR;
     }
+    const sibling = path.join(__dirname, '../../user');
+    if (fs.existsSync(path.join(sibling, 'config/site.yaml'))) {
+        return sibling;
+    }
     try {
         const raw = execSync(
             "docker inspect intotheeast_grav --format '{{range .Mounts}}{{if eq .Destination \"/var/www/html/user\"}}{{.Source}}{{end}}{{end}}'",
@@ -24,7 +34,7 @@ function resolveUserDir() {
     } catch (_) {
         // docker not available or container not running
     }
-    return path.join(__dirname, '../../user');
+    return sibling;
 }
 
 /**