fix(themes): pages themes Twitch vides -> requetes Helix tokenisees + fallbacks game_id/top-streams

src/components/themes/provider-theme-page.component.ts

@@ -193,12 +193,15 @@ export class ProviderThemePageComponent implements OnDestroy {
     const baseTokens = this.themes.tokensFor(slug);
 
     if (provider === 'twitch') {
+      // Helix /search/channels et /search/categories ne matchent que des noms
+      // proches : une longue phrase multi-mots ("cooking food Food Cooking
+      // Recipe") ne retourne jamais rien. On envoie UN mot-clé court ; le
+      // service tente ensuite les variantes + game_id + top streams.
       const twitchTokens = TWITCH_THEME_KEYWORDS[slug] || [];
-      const merged = [...new Set([...twitchTokens, ...baseTokens])];
-      const value = merged.join(' ').trim();
-      if (value) return value;
-      if (twitchTokens.length) return twitchTokens.join(' ');
-      return slug.replace(/-/g, ' ');
+      const first = (twitchTokens[0] || baseTokens[0] || slug.replace(/-/g, ' ') || '').trim();
+      // Garde le premier mot pour maximiser le taux de match Helix.
+      const short = String(first).split(/[^A-Za-z0-9à-ÿ]+/).filter(Boolean)[0] || first;
+      return (short || first || slug.replace(/-/g, ' ')).trim();
     }
 
     const value = baseTokens.join(' ').trim();

src/components/themes/theme-page.component.ts

@@ -215,8 +215,10 @@ export class ThemePageComponent {
       return;
     }
     // Twitch hors live/trending : VODs + clips + fallback top streams.
+    // Helix ne matche pas les longues phrases : un seul mot-clé court.
     if (block.provider === 'twitch') {
-      const q = tokens.join(' ');
+      const raw = tokens.join(' ').trim();
+      const q = (raw.split(/[^A-Za-z0-9à-ÿ]+/).filter(w => w.length >= 3)[0] || raw).trim();
       const call = q ? this.api.searchTwitchThemePage(q, null) : this.api.getTwitchTopStreamsPage(null);
       call.subscribe({
         next: res => {