feat: 增强 expect 规则系统，支持多种 body 校验方法和操作符

- 新增 body 分组校验：contains、regex、json（JSONPath）、css（CSS选择器）、xpath
- 新增操作符系统：equals、contains、match、empty、exists、gte、lte、gt、lt
- 新增 headers 响应头校验
- 引入 cheerio、xpath、@xmldom/xmldom 依赖
- BREAKING: expect.bodyContains 迁移至 expect.body.contains

src/server/checker/store.ts

@@ -83,7 +83,16 @@ export class ProbeStore {
             existingMap.get(target.name)!,
           );
         } else {
-          insertStmt.run(target.name, target.url, target.method, headers, target.body ?? null, target.intervalMs, target.timeoutMs, expect);
+          insertStmt.run(
+            target.name,
+            target.url,
+            target.method,
+            headers,
+            target.body ?? null,
+            target.intervalMs,
+            target.timeoutMs,
+            expect,
+          );
         }
       }
 
@@ -133,9 +142,9 @@ export class ProbeStore {
   }
 
   getLatestCheck(targetId: number): StoredCheckResult | null {
-    return this.db.query("SELECT * FROM check_results WHERE target_id = ? ORDER BY timestamp DESC LIMIT 1").get(targetId) as
-      | StoredCheckResult
-      | null;
+    return this.db
+      .query("SELECT * FROM check_results WHERE target_id = ? ORDER BY timestamp DESC LIMIT 1")
+      .get(targetId) as StoredCheckResult | null;
   }
 
   getHistory(targetId: number, limit = 20): StoredCheckResult[] {
@@ -183,7 +192,10 @@ export class ProbeStore {
     };
   }
 
-  getTrend(targetId: number, hours = 24): Array<{
+  getTrend(
+    targetId: number,
+    hours = 24,
+  ): Array<{
     hour: string;
     avgLatencyMs: number | null;
     availability: number;
@@ -257,7 +269,9 @@ export class ProbeStore {
 
   getSparkline(targetId: number, limit = 20): number[] {
     const rows = this.db
-      .prepare("SELECT latency_ms FROM check_results WHERE target_id = ? AND success = 1 ORDER BY timestamp DESC LIMIT ?")
+      .prepare(
+        "SELECT latency_ms FROM check_results WHERE target_id = ? AND success = 1 ORDER BY timestamp DESC LIMIT ?",
+      )
       .all(targetId, limit) as Array<{ latency_ms: number }>;
     return rows.map((r) => r.latency_ms).reverse();
   }