docs: mark N53/N81/N82 fixed; add F3/G3 visual checks to testing guide

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

LOTUS_TESTING.md

@@ -254,6 +254,11 @@ In Settings → Appearance:
 2. Pick a **seasonal theme** → confirm the **chat background** auto-clears to none.
 3. (Edge) If you have old data with both set, after reload only one should visibly apply (no double-overlay clutter).
 
+### F3. Background / seasonal picker grid layout (N81)
+
+In Settings → Appearance, look at the **Chat Background** and **Seasonal Theme** swatch grids; resize the window narrow→wide.
+**Expected:** swatches reflow to fill each row evenly (responsive grid), with no lopsided/orphaned last row at any width.
+
 ---
 
 ## G. Calls — additional unverified (👥 2 people)
@@ -271,6 +276,11 @@ In a call with at least one other person, pop out the **Picture-in-Picture** min
 1. In a **camera-only** call (no screenshare), confirm the **Fullscreen** button is available (previously only showed during screenshare).
 2. Use **MemberGlance → Focus camera** to full-screen/spotlight a specific person's camera. (Overlaps **A5**; if you've done A5 you can skip.)
 
+### G3. PTT badge renders on all themes (N53)
+
+Enable **Push-to-talk** (Settings → Calls) and join a call. Hold the PTT key.
+**Expected:** the floating PTT badge above the controls shows "PTT — Hold KEY" when idle and "● Live" (green) while held — on **both** a default theme and Lotus Terminal (it's now a single folds Chip; the old terminal-only variant was removed).
+
 ---
 
 ## H. Media / performance (needs a room with many images)