migrate subtitle style config to CSS declaration shape

- Flat style keys (fontFamily, fontSize, hoverTokenColor, etc.) consolidated into subtitleStyle.css, secondary.css, and subtitleSidebar.css objects
- Hover token colors migrated to --subtitle-hover-token-color CSS custom properties
- Plugin app-ping now checks result.status (0=running, 1=stopped) to avoid treating transient failures as stopped
- Note-fields note type picker defaults to configured deck's note type before falling back to Kiku/Lapis
- New migration for legacy ankiConnect N+1 config paths

src/config/resolve/subtitle-style.test.ts

@@ -34,6 +34,8 @@ test('subtitleStyle css declarations accept string declaration maps and warn on
       css: {
         'font-size': '42px',
         'text-wrap': 'balance',
+        '--subtitle-hover-token-color': '#c6a0f6',
+        '--subtitle-hover-token-background-color': 'transparent',
       },
       secondary: {
         css: {
@@ -46,7 +48,11 @@ test('subtitleStyle css declarations accept string declaration maps and warn on
   assert.deepEqual(valid.context.resolved.subtitleStyle.css, {
     'font-size': '42px',
     'text-wrap': 'balance',
+    '--subtitle-hover-token-color': '#c6a0f6',
+    '--subtitle-hover-token-background-color': 'transparent',
   });
+  assert.equal(valid.context.resolved.subtitleStyle.hoverTokenColor, '#c6a0f6');
+  assert.equal(valid.context.resolved.subtitleStyle.hoverTokenBackgroundColor, 'transparent');
   assert.deepEqual(valid.context.resolved.subtitleStyle.secondary.css, {
     'text-transform': 'uppercase',
   });