feat: AI 助手模型管理（CRUD、会话绑定、自动化验收）

- Flyway V6：模型表、默认种子、ai_chat_session.model_id 回填
- 管理端 /api/admin/ai/models；用户端选模与新会话绑定
- 禁用模型后会话只读（5009）；chat 按会话 modelCode 调 DashScope
- 前端 AiModels 页、助手模型选择器与 localStorage
- 单测、AiModelManagementApiIT、Playwright E2E；e2e Profile 关闭注解限流
- 技术实施文档与验收报告；移除过期冲突分析文档

Co-authored-by: Cursor <cursoragent@cursor.com>

jog-framework/src/main/java/fun/nojava/framework/aspect/RateLimitAspect.java

@@ -9,6 +9,7 @@ import org.aspectj.lang.ProceedingJoinPoint;
 import org.aspectj.lang.annotation.Around;
 import org.aspectj.lang.annotation.Aspect;
 import org.aspectj.lang.reflect.MethodSignature;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.data.redis.core.script.DefaultRedisScript;
 import org.springframework.stereotype.Component;
@@ -25,6 +26,9 @@ public class RateLimitAspect {
 
     private final StringRedisTemplate redisTemplate;
 
+    @Value("${jog.rate-limit.enabled:true}")
+    private boolean rateLimitEnabled;
+
     private static final String LUA_SCRIPT =
             "local current = redis.call('INCR', KEYS[1]) " +
             "if current == 1 then " +
@@ -37,6 +41,9 @@ public class RateLimitAspect {
 
     @Around("@annotation(fun.nojava.common.annotation.RateLimit)")
     public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
+        if (!rateLimitEnabled) {
+            return joinPoint.proceed();
+        }
         MethodSignature signature = (MethodSignature) joinPoint.getSignature();
         Method method = signature.getMethod();
         RateLimit rateLimit = method.getAnnotation(RateLimit.class);