fix: move comments out of workflow if: expression block

Forgejo runner's expression parser rejects '#' characters inside
if: | blocks (run 52778: "unexpected character '#' while lexing
expression"). Move all comments above the if: key and switch from
block scalar (|) to folded scalar (>-) to avoid multiline issues.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/claude.yml

@@ -15,13 +15,17 @@ concurrency:
 
 jobs:
   claude:
-    if: |
+    # Forgejo workflow if: limitations (expression parser rejects '#' comments):
+    #   - pull_request_review_comment / pull_request_comment: Forgejo collapses both
+    #     review comments and full reviews into pull_request_comment. Cannot gate on
+    #     @claude here — payload fields are empty (run 12084). Check in trigger.ts.
+    #   - pull_request_review: Only fires on GitHub, dead code on Forgejo.
+    #   - issues: Forgejo does not populate github.event.action (run 12061 skipped
+    #     despite action being 'labeled'). Let all through; trigger.ts validates.
+    if: >-
       (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review_comment' || github.event_name == 'pull_request_comment') ||
       (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
-      # Forgejo does not populate github.event.action in the workflow if: context for
-      # issues events (run 12061 was skipped despite action being 'labeled'). Let all
-      # issues events through — trigger.ts validates label/assignee/mention checks.
       (github.event_name == 'issues')
     runs-on: grunt
     steps: