fix(border-color): keep ComboBox popup clicks inside LeftPanel (TASK 63)

MyMistakes.md

@@ -2275,6 +2275,36 @@ sizes to its **content**, not to the ComboBox — measured 142.7px of popup for
 whose rows read "swatch + hex + name". A long row is never clipped, and the popup may be wider
 than the closed box. Measure with `ActualWidth` in a throwaway test; do not guess widths.
 
+**2026-10-22 follow-up — `PopupRoot` IS a `Visual`, yet its `VisualTreeHelper.GetParent` is `null`:**
+Switching from a code-built `ContextMenu` (which is not in `MainWindow`'s routed-event path) to a
+`ComboBox` (`PART_Popup`) exposed a latent bug in `LeftPanel.IsDescendantOf`:
+```csharp
+child = child is Visual or System.Windows.Media.Media3D.Visual3D
+    ? VisualTreeHelper.GetParent(child)
+    : LogicalTreeHelper.GetParent(child);
+```
+When the user clicked a colour row inside the open `ComboBox` popup, `PreviewMouseLeftButtonDown`
+tunnelled through `MainWindow.Window_PreviewMouseLeftButtonDown` first. `IsDescendantOf` walked up
+`VisualTreeHelper.GetParent` to `PopupRoot` (the root `Visual` of the popup's separate Win32
+`HwndSource`). Because `PopupRoot` IS a `Visual`, the ternary took the `VisualTreeHelper.GetParent`
+branch and got `null` — never crossing `PopupRoot`'s **logical** parent
+(`LogicalTreeHelper.GetParent(popupRoot) == PART_Popup`). `LeftPanel.IsClickInside` returned
+`false`, and `MainWindow` set `SelectedElement = null` (exiting the properties listing before the
+`ComboBoxItem` click could register). Fix: always coalesce
+`VisualTreeHelper.GetParent(child) ?? LogicalTreeHelper.GetParent(child) ?? (child as FrameworkElement)?.TemplatedParent`.
+
+## 2026-10-22 — WINDOWS GIT IDENTITY + PRE-TASK GIT STATUS (RECIPE)
+
+- **Windows `git` vs WSL `~/.gitconfig`:** the creator's `user.name` / `user.email` lived only in
+  WSL's `~/.gitconfig`, so running `git commit` from the Windows PowerShell host failed with
+  `Author identity unknown`. Fixed permanently in `.git/config` (`[user] name = gramps`,
+  `email = gramps@llamachile.shop`). If you ever need the repo's commit author without running a
+  shell command, read `.git/logs/HEAD` directly with `read_file`.
+- **Check `git status` BEFORE starting a task** (and never run multiline/compound shell commands
+  when a single simple command or `read_file`/`edit_file` works): `verify.sh` runs `scope-check.sh`
+  over `git diff HEAD`, so any pre-existing uncommitted files in the worktree will fail step 3 at
+  the end of a 2-minute build+test run unless spotted up front.
+
 ## 2026-10-22 — SCANNING A GIT HISTORY FOR SECRETS WITHOUT EVER PRINTING ONE (RECIPE)
 
 A release gate ("the repo goes public — check the history first"). The rule from