post.html attribution palette: usernames render w. @-prefix (bare emails left as-is); .post-attribution spans wrap username+title combos for the --quaUser colour key — line author col, self/shared header lines, Note.grant_if_new prose

- new lyric_extras.at_handle filter: '@{username}' if user.username, else truncate_email(user.email). Companion to display_name (which has no @-prefix). Used by post.html line author col + self/shared self lines.
  - post.html updates: line author span renders {{ line.author|at_handle }}; .post-shared-recipients chips render {{ r|at_handle }} + .post-attribution; .post-shared-self wraps "{handle} the {title}" in <span class="post-attribution">. The 'just me' / '& me' prose stays plain (only the handle+title combo is coloured).
  - Note.grant_if_new prose wraps both the @-handle (or bare email fallback) AND the title in <span class="post-attribution">. Standard format wraps the combo "{handle} the {title}" together; admin format wraps each independently since the prose splits them ("recognizes @disco for ... customary title of Schizoid Man"). Existing Lines unchanged — going-forward styling only.
  - SCSS: .post-attribution { color: rgba(var(--quaUser), 1); } scoped at .post-page so it lights up in both .post-header descendants and #id_post_table descendants. .post-line-author also switches from opacity-based dim to the same --quaUser key (drops opacity 0.75 since the colour change reads as the de-emphasis on its own).
  - 852 ITs still green — line.text inclusions ("Stargazer", "alice@test.io" etc.) still substring-match through the wrapping spans.

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/apps/drama/models.py

@@ -293,21 +293,31 @@ class Note(models.Model):
             post.title = NOTE_UNLOCK_POST_TITLE
             post.save(update_fields=["title"])
 
-        username = user.username or user.email
+        # Bare-email fallback when user.username is None (no `@` prefix —
+        # the address already carries one). When username is set, use the
+        # `@handle` form. Both wrapped in .post-attribution so the CSS
+        # palette key (--quaUser) lights up the username + title combo.
+        handle = f"@{user.username}" if user.username else user.email
         note_anchor = (
             f'<a class="note-ref" href="/billboard/my-notes/">'
             f'{note.display_name}</a>'
         )
+        attr_handle = f'<span class="post-attribution">{handle}</span>'
+        attr_title  = f'<span class="post-attribution">{note.display_title}</span>'
         if slug in _ADMIN_NOTE_SLUGS:
             line_text = (
-                f"The administration recognizes {username} for {note_anchor}, "
-                f"which comes with the customary title of {note.display_title}. "
+                f"The administration recognizes {attr_handle} for {note_anchor}, "
+                f"which comes with the customary title of {attr_title}. "
                 "This does not entail any additional benefits."
             )
         else:
+            attr_combo = (
+                f'<span class="post-attribution">{handle} '
+                f'the {note.display_title}</span>'
+            )
             line_text = (
                 f"Look!—new Note unlocked. {note_anchor} "
-                f"recognizes {username} the {note.display_title}."
+                f"recognizes {attr_combo}."
             )
 
         # Lazy get-or-create: TransactionTestCase flushes the migration-seeded