Remove unused search index

modules/story-summary/vector/search-index.js

@@ -1,93 +0,0 @@
-// ═══════════════════════════════════════════════════════════════════════════
-// MiniSearch Index Manager
-// 全文搜索索引管理
-// ═══════════════════════════════════════════════════════════════════════════
-
-import MiniSearch from '../../../libs/minisearch.mjs';
-
-// 索引缓存：chatId -> { index, updatedAt }
-const indexCache = new Map();
-
-/**
- * 获取或创建搜索索引
- * @param {string} chatId
- * @param {Array} events - L2 事件
- * @param {number} storeUpdatedAt - store.updatedAt 时间戳
- * @returns {MiniSearch}
- */
-export function getSearchIndex(chatId, events, storeUpdatedAt) {
-    const cached = indexCache.get(chatId);
-    
-    // 缓存有效
-    if (cached && cached.updatedAt >= storeUpdatedAt) {
-        return cached.index;
-    }
-    
-    // 重建索引
-    const index = new MiniSearch({
-        fields: ['title', 'summary', 'participants'],
-        storeFields: ['id'],
-        searchOptions: {
-            boost: { title: 2, participants: 1.5, summary: 1 },
-            fuzzy: 0.2,
-            prefix: true,
-        },
-    });
-    
-    // 索引事件
-    const docs = events.map(e => ({
-        id: e.id,
-        title: e.title || '',
-        summary: e.summary || '',
-        participants: (e.participants || []).join(' '),
-    }));
-    
-    index.addAll(docs);
-    
-    // 缓存
-    indexCache.set(chatId, { index, updatedAt: storeUpdatedAt });
-    
-    // 限制缓存数量
-    if (indexCache.size > 5) {
-        const firstKey = indexCache.keys().next().value;
-        indexCache.delete(firstKey);
-    }
-    
-    return index;
-}
-
-/**
- * 关键词搜索
- * @returns {Map<string, number>} - eventId -> 归一化分数
- */
-export function searchByKeywords(index, queryText, limit = 20) {
-    if (!queryText?.trim()) return new Map();
-    
-    const results = index.search(queryText, { limit });
-    
-    if (results.length === 0) return new Map();
-    
-    // 归一化分数到 0-1
-    const maxScore = results[0].score;
-    const scores = new Map();
-    
-    for (const r of results) {
-        scores.set(r.id, r.score / maxScore);
-    }
-    
-    return scores;
-}
-
-/**
- * 清除指定聊天的索引缓存
- */
-export function invalidateIndex(chatId) {
-    indexCache.delete(chatId);
-}
-
-/**
- * 清除所有索引缓存
- */
-export function clearAllIndexes() {
-    indexCache.clear();
-}