feat(mobile): source-code link in Settings + Refresh thumbnail button

- AppLockSettings: a "Source code" row linking the public OSS repo (report 4c5066b8) -
  a trust signal for a sideloaded FOSS app (audit / self-host / contribute).
- SceneDetail: a "Refresh thumbnail" button (force) for scenes whose preview is broken
  or stale (report d3376a71).
- changelog: new What's New entry for this batch.

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

mobile/src/api.ts

@@ -436,13 +436,14 @@ export class GoonClient {
     return this.request(`/scenes/${sceneId}/enrich-duration`, { method: 'POST' });
   }
 
-  async enrichSceneThumbnail(sceneId: string): Promise<{
+  async enrichSceneThumbnail(sceneId: string, force = false): Promise<{
     scene_id: string;
     thumbnail_url: string | null;
     tube_used: string | null;
     sources_updated: number;
   }> {
-    return this.request(`/scenes/${sceneId}/enrich-thumbnail`, { method: 'POST' });
+    const qs = force ? '?force=true' : '';
+    return this.request(`/scenes/${sceneId}/enrich-thumbnail${qs}`, { method: 'POST' });
   }
 
   async enrichSceneStudio(sceneId: string): Promise<{

mobile/src/changelog.ts

@@ -16,6 +16,15 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    id: '2026-06-13',
+    date: 'June 2026',
+    items: [
+      'Source code link added in Settings — the app is open source (MIT).',
+      'New: a Refresh thumbnail button on a scene when its preview is broken or stale.',
+      'Fewer dead links — deleted videos on some sites are now detected automatically.',
+    ],
+  },
   {
     id: '2026-06-12',
     date: 'June 2026',

mobile/src/screens/AppLockSettingsScreen.tsx

@@ -2,6 +2,7 @@ import React, { useEffect, useState } from 'react';
 import {
   ActivityIndicator,
   Alert,
+  Linking,
   Pressable,
   ScrollView,
   StyleSheet,
@@ -266,11 +267,26 @@ export function AppLockSettingsScreen() {
           </View>
           <Text style={styles.versionValue}>{APP_VERSION}</Text>
         </View>
+        <Pressable
+          style={styles.row}
+          onPress={() => Linking.openURL(REPO_URL).catch(() => {})}
+        >
+          <View style={{ flex: 1 }}>
+            <Text style={styles.label}>Source code</Text>
+            <Text style={styles.hint}>Open source (MIT) — audit it or self-host</Text>
+          </View>
+          <Text style={styles.linkValue}>{REPO_LABEL} ›</Text>
+        </Pressable>
       </View>
     </ScrollView>
   );
 }
 
+// Publiczne repo OSS (zgłoszenie usera 4c5066b8: "no source code repo linked").
+// Sygnał zaufania dla sideloadowanej apki 18+: audyt kodu / self-host / kontrybucja.
+const REPO_URL = 'https://github.com/goon-foss/goon';
+const REPO_LABEL = 'goon-foss/goon';
+
 const styles = StyleSheet.create({
   root: { flex: 1, backgroundColor: theme.bg },
   center: { flex: 1, backgroundColor: theme.bg, alignItems: 'center', justifyContent: 'center' },
@@ -320,6 +336,7 @@ const styles = StyleSheet.create({
   },
   chipActive: { backgroundColor: theme.accent, borderColor: theme.accent },
   versionValue: { color: theme.fg, fontSize: 15, fontWeight: '700', fontVariant: ['tabular-nums'] },
+  linkValue: { color: theme.accent, fontSize: 15, fontWeight: '700' },
   chipText: { color: theme.muted, fontSize: 13 },
   chipTextActive: { color: '#fff', fontWeight: '700' },
 });

mobile/src/screens/SceneDetailScreen.tsx

@@ -119,6 +119,21 @@ export function SceneDetailScreen() {
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [data?.id]);
 
+  // Ręczny refresh miniatury (force) — zgłoszenie d3376a71: zepsuta/stała miniaturka
+  // (np. rotting sxyprn/trafficdeposit). Nadpisuje istniejącą świeżą ze strony tube'a.
+  const refreshThumbMutation = useMutation({
+    mutationFn: () => client.enrichSceneThumbnail(id, true),
+    onSuccess: (out) => {
+      queryClient.invalidateQueries({ queryKey: ['scene', id] });
+      queryClient.invalidateQueries({ queryKey: ['scenes'] });
+      Alert.alert(
+        'Thumbnail',
+        out.thumbnail_url ? 'Refreshed from the source page.' : 'Could not fetch a fresh thumbnail.',
+      );
+    },
+    onError: (e) => Alert.alert('Thumbnail', e instanceof Error ? e.message : String(e)),
+  });
+
   // Auto-enrich tags: search-only scrapery nie pobierają tagów z detail page.
   // Pornhat ma `js-ajax-tag` data-setup JSON; xhamster/xvideos/youporn/inne mają
   // dedicated tag_extract patterny. SceneDetail wywołuje 1 fetch → upsert do DB.
@@ -223,6 +238,18 @@ export function SceneDetailScreen() {
       <Hero data={data} />
 
       <View style={styles.body}>
+        {data.playback_sources.some((s) => s.origin?.startsWith('tube:')) && (
+          <Pressable
+            style={styles.refreshThumbBtn}
+            onPress={() => refreshThumbMutation.mutate()}
+            disabled={refreshThumbMutation.isPending}
+          >
+            <Text style={styles.refreshThumbText}>
+              {refreshThumbMutation.isPending ? 'Refreshing thumbnail…' : '↻ Refresh thumbnail'}
+            </Text>
+          </Pressable>
+        )}
+
         {(data.code || data.director) && (
           <View style={styles.metaRow}>
             {data.code ? <Text style={styles.metaDim}>code · {data.code}</Text> : null}
@@ -854,6 +881,17 @@ const styles = StyleSheet.create({
     fontSize: 13,
   },
   tagHint: { color: theme.mutedDim, fontSize: 11, marginTop: 6 },
+  refreshThumbBtn: {
+    alignSelf: 'flex-start',
+    paddingVertical: 6,
+    paddingHorizontal: 12,
+    borderRadius: 8,
+    borderWidth: 1,
+    borderColor: theme.border,
+    backgroundColor: theme.card,
+    marginBottom: 12,
+  },
+  refreshThumbText: { color: theme.muted, fontSize: 13, fontWeight: '600' },
 
   pillSource: {
     borderColor: theme.accent,