fix: Windows command quoting, atomic JSON/log writes, restore dropped test

Implements items 1-3 of the whole-project review's suggested order
(docs/PROJECT_REVIEW_PLAN.md):

- Restore TestJobListViewIsCompact, accidentally dropped by 5b0e6fe;
  drop the redundant TestDefaultConfigUsesDetailedJobList row from
  TESTS.md and document the two other doc gaps the review found.
- Fix quoteLeadingWindowsProgramPath to find the earliest file-extension
  match at a word boundary instead of the first extension in list order,
  so a .bat/.cmd command whose argument ends in .exe no longer has its
  whole command line mistaken for the program path.
- Write gosentry.json, jobs.json, and run log files atomically (temp
  file + rename) so a crash or power loss mid-write can no longer leave
  a truncated file. Wire Service.Stop() into the app shutdown path so
  it actually runs, cancelling the run context for in-flight runs.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/CHANGELOG.md

@@ -21,6 +21,17 @@ the app icon (experimental).**
 - On Windows, failure toasts can show the app icon: after `NewWindow`,
   `AppMetadata.Icon` is registered so Fyne picks up artwork without calling
   `SetIcon`, which would override the PE multi-size window/taskbar icon.
+- Fixed a Windows quoting bug where a job whose **Command** field held a whole
+  command line (a `.bat`/`.cmd` wrapper followed by an argument that itself
+  ended in `.exe`) had its entire command line mistaken for the program path,
+  so the run failed with an unmappable shell error. The program path is now
+  found by the earliest file-extension match at a word boundary, not the first
+  extension in list order.
+- `gosentry.json` and `jobs.json` (and run log files) are now written
+  atomically — to a temp file, then renamed into place — so a crash or power
+  loss mid-write can no longer leave a truncated or empty file. `Service.Stop()`
+  is now called when the app quits, which also makes the run context
+  cancellation reach in-flight runs on shutdown.
 
 **Jobs:**