feat: 搜索结果持久化保存 + 结果数量可配置

- 新增 search_results 表，搜索结果按主题持久保存
- 搜索API自动保存结果到数据库，获取详情时更新raw_content
- 页面加载时自动加载历史搜索结果，按搜索词分组显示
- 支持单条删除和清空所有搜索结果
- 搜索结果数量默认10条，可通过输入框调整(1-20)
- 搜索面板标题显示结果计数badge

app.py

@@ -123,6 +123,20 @@ def init_db():
             api_key TEXT DEFAULT '',
             updated_at TEXT DEFAULT (datetime('now','localtime'))
         );
+        CREATE TABLE IF NOT EXISTS search_results (
+            id TEXT PRIMARY KEY,
+            topic_id TEXT NOT NULL,
+            query TEXT NOT NULL,
+            title TEXT DEFAULT '',
+            url TEXT DEFAULT '',
+            snippet TEXT DEFAULT '',
+            raw_content TEXT DEFAULT '',
+            score REAL DEFAULT 0,
+            search_depth TEXT DEFAULT 'basic',
+            max_results INTEGER DEFAULT 10,
+            created_at TEXT DEFAULT (datetime('now','localtime')),
+            FOREIGN KEY (topic_id) REFERENCES topics(id) ON DELETE CASCADE
+        );
     ''')
     # 初始化默认Prompt模板
     default_templates = [
@@ -776,9 +790,10 @@ def update_search_config():
 
 @app.route('/api/search', methods=['POST'])
 def search_web():
-    """调用 Tavily Search API 进行搜索"""
+    """调用 Tavily Search API 进行搜索，结果保存到数据库"""
     data = request.get_json(force=True)
     query = data.get('query', '').strip()
+    topic_id = data.get('topic_id', '').strip()
     if not query:
         return jsonify({'error': '搜索关键词不能为空'}), 400
 
@@ -786,7 +801,7 @@ def search_web():
     if not search_config['api_key']:
         return jsonify({'error': '请先配置搜索API Key（首页右上角设置）'}), 400
 
-    max_results = data.get('max_results', 8)
+    max_results = data.get('max_results', 10)
     search_depth = data.get('search_depth', 'basic')
     time_range = data.get('time_range', None)
 
@@ -811,19 +826,43 @@ def search_web():
         )
         resp.raise_for_status()
         result = resp.json()
-        return jsonify(result)
     except requests.exceptions.HTTPError as e:
         return jsonify({'error': f'搜索请求失败: HTTP {e.response.status_code}'}), 502
     except Exception as e:
         return jsonify({'error': f'搜索失败: {str(e)}'}), 500
 
+    # 保存搜索结果到数据库
+    if topic_id:
+        conn = get_db()
+        now = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+        saved_results = []
+        for r in result.get('results', []):
+            rid = str(uuid.uuid4())[:8]
+            conn.execute(
+                'INSERT INTO search_results (id, topic_id, query, title, url, snippet, score, search_depth, max_results, created_at) VALUES (?,?,?,?,?,?,?,?,?,?)',
+                (rid, topic_id, query, r.get('title', ''), r.get('url', ''), r.get('content', ''), r.get('score', 0), search_depth, max_results, now)
+            )
+            saved_results.append({
+                'id': rid,
+                'title': r.get('title', ''),
+                'url': r.get('url', ''),
+                'content': r.get('content', ''),
+                'score': r.get('score', 0),
+            })
+        conn.commit()
+        conn.close()
+        result['saved_results'] = saved_results
+
+    return jsonify(result)
+
 
 @app.route('/api/search/detail', methods=['POST'])
 def search_detail():
-    """调用 Tavily Search API 获取详细内容（include_raw_content）"""
+    """获取搜索结果详细内容，并更新数据库中的 raw_content"""
     data = request.get_json(force=True)
     query = data.get('query', '').strip()
     url = data.get('url', '').strip()
+    result_id = data.get('result_id', '').strip()
     if not query:
         return jsonify({'error': '搜索关键词不能为空'}), 400
 
@@ -855,11 +894,52 @@ def search_detail():
         # 如果指定了URL，过滤只返回该URL的结果
         if url:
             result['results'] = [r for r in result.get('results', []) if r.get('url') == url]
+
+        # 更新数据库中的 raw_content
+        if result_id and result.get('results'):
+            raw_content = result['results'][0].get('raw_content', '') or result['results'][0].get('content', '')
+            conn = get_db()
+            conn.execute('UPDATE search_results SET raw_content=? WHERE id=?', (raw_content, result_id))
+            conn.commit()
+            conn.close()
+
         return jsonify(result)
     except Exception as e:
         return jsonify({'error': f'获取详情失败: {str(e)}'}), 500
 
 
+@app.route('/api/topics/<topic_id>/search-results', methods=['GET'])
+def get_topic_search_results(topic_id):
+    """获取主题的所有搜索结果"""
+    conn = get_db()
+    results = conn.execute(
+        'SELECT * FROM search_results WHERE topic_id=? ORDER BY created_at DESC',
+        (topic_id,)
+    ).fetchall()
+    conn.close()
+    return jsonify([dict(r) for r in results])
+
+
+@app.route('/api/search-results/<result_id>', methods=['DELETE'])
+def delete_search_result(result_id):
+    """删除单条搜索结果"""
+    conn = get_db()
+    conn.execute('DELETE FROM search_results WHERE id=?', (result_id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'ok': True})
+
+
+@app.route('/api/topics/<topic_id>/search-results', methods=['DELETE'])
+def clear_topic_search_results(topic_id):
+    """清空主题的所有搜索结果"""
+    conn = get_db()
+    conn.execute('DELETE FROM search_results WHERE topic_id=?', (topic_id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'ok': True})
+
+
 # ==================== LLM配置API ====================
 
 @app.route('/api/llm-config', methods=['GET'])