the addon survey seats a populated world, and hidden frames arrive

- the corpus harness now seats a buff, a target and a ticking cooldown instead of an empty world, so "nothing to draw" and "failed to draw" stop sharing a row — and the richer seat immediately exposed two real gaps
- an addon button inheriting our action-button template now works even when it replaces the template's OnLoad: the handlers resolve their regions by name, the way the reference does on every access
- more of the reference's hidden-by-default frames exist by name — ReputationWatchBar, MiniMapBattlefieldFrame, MiniMapMeetingStoneFrame — for the addons that reposition them
- StartSizing lands beside its stop verb, and the sourced bag-anchor code runs against windows we actually build

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/benilla-app/src/ui_script/action_bar_tests.rs

@@ -24,9 +24,9 @@ fn shipped_action_bar_drives_end_to_end() {
         );
         if file == "ActionBar.xml" {
             assert_eq!(
-                report.frames, 59,
+                report.frames, 61,
                 "bar + XP StatusBar (+ its numerals overlay) + exhaustion tick + max-level rail + art frame + 12 buttons (each with a Cooldown child) + 2 page buttons + the performance meter and its hover button, \
-                 + BonusActionBarFrame and its 12 buttons with their Cooldown children (25 — hidden, as the reference's is; decision 1223)"
+                 + BonusActionBarFrame and its 12 buttons with their Cooldown children (25 — hidden, as the reference's is; decision 1223), + ReputationWatchBar and its status bar (2 — hidden, ref ReputationFrame.xml:869)"
             );
         }
     }