update tasklist: phase A and B complete

TASKLIST.md

@@ -6,20 +6,6 @@
 
 ## Pending
 
-### Phase A -- Safety (complete)
-
-- [x] Replace `_strip_html` regex with `html.parser` stripper
-- [x] Add defensive config loading (filter unknown TOML keys)
-- [x] Guard `join_channel`/`send_text` against `KeyError`
-
-## Pending
-
-### Phase B -- Performance
-
-- [ ] Replace `_apply_gain` with numpy implementation
-- [ ] Replace `time.sleep(0.005)` polling with `queue.get(timeout=)`
-- [ ] Drain audio queues on `stop()`
-
 ### Phase C -- Architecture
 
 - [ ] Extract `ReconnectManager` to `reconnect.py` (includes `threading.Event`)
@@ -49,6 +35,20 @@
 
 ## Completed
 
+### Phase A -- Safety
+
+- [x] Replace `_strip_html` regex with `html.parser` stripper
+- [x] Add defensive config loading (filter unknown TOML keys)
+- [x] Guard `join_channel`/`send_text` against `KeyError`
+
+### Phase B -- Performance
+
+- [x] Replace `_apply_gain` struct with `array` module (numpy unavailable)
+- [x] Replace `time.sleep(0.005)` polling with `queue.get(timeout=)`
+- [x] Drain audio queues on `stop()`
+
+### Earlier Work
+
 - [x] Wire TUI to MumbleClient (connect on startup, display state)
 - [x] Implement text message send/receive in chat log
 - [x] Channel tree population from server data