fix(release): preserve attribution placement; default update notifs to o

- Move What's Changed/New Contributors before Installation in release notes
- Preserve committed attribution when regenerating via writeReleaseNotesForVersion
- Change notificationType default from 'both' to 'overlay' for new installs

docs-site/changelog.md

@@ -24,7 +24,7 @@
 - **Stats Browsing**: Remembers library card size; retries stored cover art without extra AniList lookups; preserves PNG/WebP MIME types; honors custom AnkiConnect URLs for Browse; shows progress during session deletes.
 - **Startup Notifications**: Tokenization, subtitle annotation, and character dictionary status now route through queued overlay notifications in `overlay`/`both` mode instead of falling back to mpv OSD while the overlay loads.
 - **Notification Deduplication**: Cycling subtitle modes updates the active overlay card in place rather than stacking duplicates; repeated progress updates (e.g. subsync) tick in place without flickering.
-- **Update Notification Default**: New installs default `notificationType` to `both` so update alerts appear in both overlay and system notifications.
+- **Update Notification Default**: New installs default `notificationType` to `overlay`, while `both` remains available for overlay + system notifications.
 
 **Fixed**
 

docs-site/configuration.md

@@ -197,7 +197,7 @@ Configure automatic update checks and update notifications:
   "updates": {
     "enabled": true,
     "checkIntervalHours": 24,
-    "notificationType": "both",
+    "notificationType": "overlay",
     "channel": "stable"
   }
 }
@@ -207,7 +207,7 @@ Configure automatic update checks and update notifications:
 | -------------------- | ------------------------------------------------- | --------------------------------------------------------------------------------------------------- |
 | `updates.enabled`    | `true`, `false`                                   | Enable automatic background update checks. Manual tray and `subminer -u` checks are always allowed. |
 | `checkIntervalHours` | number                                            | Minimum hours between automatic update checks. Default `24`.                                        |
-| `notificationType`   | `"overlay"` \| `"system"` \| `"both"` \| `"none"` | How SubMiner announces available updates. Default `"both"`, which means overlay + system.           |
+| `notificationType`   | `"overlay"` \| `"system"` \| `"both"` \| `"none"` | How SubMiner announces available updates. Default `"overlay"`. `"both"` means overlay + system.     |
 | `channel`            | `"stable"` \| `"prerelease"`                      | Release channel used for update checks. Use `"prerelease"` to test beta/RC releases.                |
 
 When `notificationType` is `"overlay"` or `"both"`, update-available overlay notifications include an **Update** button that starts the app update flow.

docs-site/public/config.example.jsonc

@@ -172,7 +172,7 @@
   "updates": {
     "enabled": true, // Run automatic update checks in the background. Values: true | false
     "checkIntervalHours": 24, // Minimum hours between automatic update checks.
-    "notificationType": "both", // How SubMiner announces available updates. overlay shows notifications on the overlay, system uses OS notifications, both uses overlay and system. osd and osd-system are legacy config-file-only values. Values: overlay | system | both | none | osd | osd-system
+    "notificationType": "overlay", // How SubMiner announces available updates. overlay shows notifications on the overlay, system uses OS notifications, both uses overlay and system. osd and osd-system are legacy config-file-only values. Values: overlay | system | both | none | osd | osd-system
     "channel": "stable" // Release channel used for update checks. Values: stable | prerelease
   }, // Automatic update check behavior.