Merge pull request #567: fix(cases): only refuse the cases folder and its direct children for a custom-folder case

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/web/case-path.ts

@@ -12,8 +12,10 @@
  *     its symlink-resolved form, against both the given and the symlink-resolved roots (a home reached
  *     through a link, macOS's `/etc` -> `/private/etc`), so a link into a blocked tree is not a way
  *     around it;
- *   - it must not be, or be inside, a cases directory: a case there is a plain Create New, and the same
- *     folder listed both as a local case and as a linked one would make deleting it remove files;
+ *   - it must not be a cases directory or a direct child of one: those are what `GET /api/cases` lists
+ *     as local cases, so a case there is a plain Create New, and the same folder listed both as a local
+ *     case and as a linked one would make deleting it remove files. A folder further down is not
+ *     listed and is allowed;
  *   - its parent must already exist (one folder is created, never a whole chain), and the folder
  *     itself must not exist or must be an EMPTY directory (a folder with contents is Link Existing's
  *     job, and silently scaffolding into someone's project is the one thing this must never do);
@@ -98,9 +100,16 @@ export function blockedReason(
     const firstSegment = absPath.slice(ctx.home.length + 1).split(sep)[0];
     if (/^\.codeman/.test(firstSegment)) return "Codeman's own data folder cannot be a case";
   }
+  // Only the cases folder itself and its DIRECT children are listed as local cases (GET /api/cases reads
+  // that one level), so only those would be registered twice. A deeper folder is not listed and is a
+  // perfectly good linked case: with CODEMAN_CASES_PATH pointing at a broad root such as /mnt/user/Scripts,
+  // refusing everything below it blocked most of the tree.
   for (const dir of ctx.casesDirs ?? []) {
-    if (isWithin(absPath, dir)) {
-      return 'That folder is inside the cases folder; create a case there with plain Create New (no custom folder)';
+    if (absPath === dir) {
+      return `That is the cases folder itself (${dir}); create a case inside it with plain Create New (no custom folder)`;
+    }
+    if (dirname(absPath) === dir) {
+      return `That folder is directly in the cases folder (${dir}), where it is listed as a local case; create it there with plain Create New (no custom folder)`;
     }
   }
   return null;