feat(ui): color and acknowledge pinned log errors

Add independent AppLog message types and explicit Class 1/2 severity. Wrap and color log rows, pin Class 1 above Class 2, and let acknowledgement return entries to the current-launch timeline without changing file format or rotation.

Ref: https://logtape.org/manual/levels

HANDOFF.md

@@ -1,24 +1,24 @@
-# HANDOFF — 2026-11-02 (Logs tab + test sweep)
+# HANDOFF — 2026-11-02 (Logs severity and acknowledgment)
 
 ## State
 
-- `main`; all work is committed locally, not pushed.
-- Non-edit left panel has Live Chat and Logs tabs. Logs shows the newest 500 AppLog entries from
-  this process only; file format and rotation are unchanged. Feature commit: `9fa06c6`.
-- The 13 failures from the prior full-suite run were resolved in separate focused commits; see
-  `git log` for each test-failure task.
-- `./scripts/verify.sh` passes: clean app build, 0 warnings, 522/522 tests, scope check.
+- `main`; previous Logs tab and 13 test-failure fixes are committed locally, not pushed.
+- Logs wraps and colors by explicit message type. Class 1 (fatal/unhandled) and Class 2 (recoverable,
+  actionable) are independent metadata; Class 1 pins above Class 2. Acknowledging unpins but retains
+  the entry in the current-launch timeline. Disk format and rotation are unchanged.
+- Logs integration test passes; clean app build is 0 warnings and scope-check passes. The last full
+  run was 521/522: only the real-mouse layer-reorder test failed while the creator was using the
+  desktop. It was not rerun; the focused drag test passes in isolation.
 
 ## Next action
 
-Day 1's separate system-message strip was replaced by the Logs tab per the creator's ruling. Next
-release check: Debug-only `InternalsVisibleTo`. Keep one integration test per change; do not push
-absent a milestone/checkpoint request.
+Commit this Logs enhancement with the interactive-mouse test exception recorded. Do not rerun that
+test while the creator is playing; do not push absent a checkpoint request.
 
 ## Landmines
 
-- Build/test with Windows `dotnet.exe`; full suite can hang in WASAPI teardown.
-- Any integration test constructing `MainWindow` must use a temporary `LayoutPathOverride` and
+- `LayerReorderPersistenceTests.RealMouseDrag_OnTheLayerList_PersistsTheReorder` injects physical
+  mouse input. It passed in isolation; do not run it while the desktop is in use.
+- Any integration test constructing `MainWindow` must set a temporary `LayoutPathOverride` and
   clear it in `finally`.
-- Debug-only `InternalsVisibleTo` remains an outstanding release check.
 - Bundled FFmpeg stays outside the single-file exe (`ExcludeFromSingleFile="true"`).