feat: Vorschläge für Folgesuchen hinzufügen

- CSS-Stile für vorgeschlagene Suchschaltflächen hinzugefügt
- HTML-Container für die Anzeige vorgeschlagener Suchen hinzugefügt
- Logik zur Darstellung und Interaktion mit vorgeschlagenen Suchen implementiert
- OpenRouter-Prompt um Hinweis auf Folgesuchen erweitert
- JSON-Schema um Feld 'suggestedSearches' ergänzt

src/services/openRouterService.js

@@ -162,7 +162,7 @@ export async function summarizeFinalAnswer({ openrouter, text, question }) {
     You are a search result analyst. Today is the date of ${new Date().toLocaleDateString()}.
     Based on the following search results for the query "${question}",
     Summarize the search results to answer the original query. Use Emoji and HTML. Tags allowed: <b>, <i>, <u>, <pre>, <ul>, <li>, <span style="color:...">, <p> <div> <hr/>
-    Also provide the most relevant sources. Answer in the language of the question.
+    Also provide the most relevant sources. Answer in the language of the question. You may suggest followup searched to the user.
   `;
 
   const params = {
@@ -179,13 +179,11 @@ export async function summarizeFinalAnswer({ openrouter, text, question }) {
         strict: true,
         schema: {
           type: 'object',
-          required: ['fullAnswerHTMLSnippet', 'mostRelevantSources'],
+          required: ['fullAnswerHTMLSnippet', 'mostRelevantSources', 'suggestedSearches'],
           properties: {
             fullAnswerHTMLSnippet: { type: 'string' },
-            mostRelevantSources: {
-              type: 'array',
-              items: { type: 'string' },
-            },
+            mostRelevantSources: { type: 'array', items: { type: 'string' } },
+            suggestedSearches: { type: 'array', items: { type: 'string' } },
           },
         },
       },