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/static_src/scss/_billboard.scss

@@ -130,6 +130,14 @@ body.page-billposts {
     padding: 0.75rem;
     gap: 0.5rem;
 
+    // Username + title attribution spans — line author column, self/shared
+    // header lines, server-rendered grant prose. --quaUser palette key
+    // unifies them across the page; placed at .post-page scope so it
+    // applies in BOTH .post-header and #id_post_table descendants.
+    .post-attribution {
+        color: rgba(var(--quaUser), 1);
+    }
+
     .post-header {
         flex-shrink: 0;
 
@@ -169,7 +177,7 @@ body.page-billposts {
 
             .post-line-author {
                 font-weight: bold;
-                opacity: 0.75;
+                color: rgba(var(--quaUser), 1);
                 white-space: nowrap;
                 font-size: 0.85rem;
             }