feat: add auto-scroll to reading position setting

- Add autoScrollToPosition setting (default: true)
- Add checkbox in Layout & Behavior settings
- Only auto-scroll when setting is enabled
- Allows users to disable auto-scrolling while keeping sync enabled

src/components/ContentPanel.tsx

@@ -226,6 +226,9 @@ const ContentPanel: React.FC<ContentPanelProps> = ({
 
         if (savedPosition && savedPosition.position > 0.05 && savedPosition.position < 1) {
           console.log('🎯 [ContentPanel] Restoring position:', Math.round(savedPosition.position * 100) + '%')
+          
+          // Only auto-scroll if the setting is enabled (default: true)
+          if (settings?.autoScrollToPosition !== false) {
             // Wait for content to be fully rendered before scrolling
             setTimeout(() => {
               const documentHeight = document.documentElement.scrollHeight
@@ -239,6 +242,9 @@ const ContentPanel: React.FC<ContentPanelProps> = ({
               
               console.log('✅ [ContentPanel] Restored to position:', Math.round(savedPosition.position * 100) + '%', 'scrollTop:', scrollTop)
             }, 500) // Give content time to render
+          } else {
+            console.log('⏭️ [ContentPanel] Auto-scroll disabled in settings')
+          }
         } else if (savedPosition) {
           if (savedPosition.position === 1) {
             console.log('✅ [ContentPanel] Article completed (100%), starting from top')

src/components/Settings/LayoutBehaviorSettings.tsx

@@ -117,6 +117,19 @@ const LayoutBehaviorSettings: React.FC<LayoutBehaviorSettingsProps> = ({ setting
           <span>Sync reading position across devices</span>
         </label>
       </div>
+
+      <div className="setting-group">
+        <label htmlFor="autoScrollToPosition" className="checkbox-label">
+          <input
+            id="autoScrollToPosition"
+            type="checkbox"
+            checked={settings.autoScrollToPosition !== false}
+            onChange={(e) => onUpdate({ autoScrollToPosition: e.target.checked })}
+            className="setting-checkbox"
+          />
+          <span>Auto-scroll to last reading position</span>
+        </label>
+      </div>
     </div>
   )
 }

src/services/settingsService.ts

@@ -56,6 +56,7 @@ export interface UserSettings {
   paragraphAlignment?: 'left' | 'justify' // default: justify
   // Reading position sync
   syncReadingPosition?: boolean // default: false (opt-in)
+  autoScrollToPosition?: boolean // default: true (auto-scroll to last reading position)
 }
 
 export async function loadSettings(