docs: record rollout acceptance on all machines (2x ubuntu, macOS, TUI render)

CHANGELOG.md

@@ -2,6 +2,13 @@
 
 Reverse-chronological. Meaningful changes only; each entry points at evidence.
 
+## 2026-10-19 — rollout accepted on all target machines
+
+- User acceptance: installed and working on 2× Ubuntu + 1× macOS, segment rendering
+  confirmed in the live TUI ("works perfectly"). FEATURE-MATRIX rows flipped from
+  `unknown`/`inferred` to `confirmed (user-reported)`; TODO rollouts checked off.
+  Standing task remaining: mcode-update bundle re-verification (D2).
+
 ## 2026-10-19 — initial release: segment, installer, docs scaffold
 
 - `zai-usage.sh` — statusline custom command: Aygea-palette `🔥 <pct>% · <clock>(<remaining>)`