rename config window to settings and update CLI entry points

- Replace `--config`/`subminer config` (no action) with `--settings`/`subminer settings`
- `subminer config` now requires an explicit action (`path` or `show`)
- `--settings` previously opened Yomitan; replaced by `--yomitan`
- Linux tray update installs AppImage via electron-updater instead of manual flow
- macOS update dialog activation and curl-fetch routing fixes
- Delete stale compiled artifacts (main.js, app-updater.js)

src/cli/help.ts

@@ -24,8 +24,8 @@ ${B}Overlay${R}
   --toggle-primary-subtitle-bar  Toggle primary subtitle bar
   --show-visible-overlay         Show subtitle overlay
   --hide-visible-overlay         Hide subtitle overlay
-  --settings                     Open Yomitan settings window
-  --config                       Open configuration window
+  --yomitan                      Open Yomitan settings window
+  --settings                     Open SubMiner settings window
   --setup                        Open first-run setup window
   --auto-start-overlay           Auto-hide mpv subs, show overlay on connect