feat(frontend): 重构视频分析页面，支持多种搜索方式

主要更新：
- 前端改用 Ant Design 组件（Table、Modal、Select 等）
- 支持三种搜索方式：星图ID、达人unique_id、达人昵称模糊匹配
- 列表页实时调用云图 API 获取 A3 数据和成本指标
- 详情弹窗显示完整 6 大类指标，支持文字复制
- 品牌 API URL 格式修复为查询参数形式
- 优化云图 API 参数格式和会话池管理

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/api/v1/video_analysis.py

@@ -1,26 +1,55 @@
 """
 视频分析API路由 (T-024)
 
-GET /api/v1/videos/{item_id}/analysis
+GET /api/v1/videos/{item_id}/analysis - 单个视频分析
+POST /api/v1/videos/search - 搜索视频列表（支持 star_id / nickname）
 """
 
-from fastapi import APIRouter, Depends, HTTPException
+from typing import List, Optional
+from fastapi import APIRouter, Depends, HTTPException, Query
+from pydantic import BaseModel
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.database import get_db
-from app.services.video_analysis import get_video_analysis_data
+from app.services.video_analysis import (
+    get_video_analysis_data,
+    get_video_base_info,
+    search_videos_by_star_id,
+    search_videos_by_unique_id,
+    search_videos_by_nickname,
+    get_video_list_with_a3,
+)
 from app.services.yuntu_api import YuntuAPIError
 
 router = APIRouter(prefix="/videos", tags=["视频分析"])
 
 
+class SearchRequest(BaseModel):
+    """搜索请求"""
+    type: str  # "star_id" | "unique_id" | "nickname"
+    value: str
+
+
+class VideoListItem(BaseModel):
+    """视频列表项"""
+    item_id: str
+    title: str
+    star_nickname: str
+    star_unique_id: str
+    create_date: Optional[str]
+    hot_type: str
+    total_play_cnt: int
+    total_new_a3_cnt: int
+    total_cost: float
+
+
 @router.get("/{item_id}/analysis")
 async def get_video_analysis(
     item_id: str,
     db: AsyncSession = Depends(get_db),
 ):
     """
-    获取视频分析数据。
+    获取单个视频分析数据。
 
     返回6大类指标：
     - 基础信息 (8字段)
@@ -53,3 +82,94 @@ async def get_video_analysis(
         raise HTTPException(status_code=500, detail=f"API Error: {e.message}")
     except Exception as e:
         raise HTTPException(status_code=500, detail=f"Internal error: {str(e)}")
+
+
+@router.post("/search")
+async def search_videos(
+    request: SearchRequest,
+    db: AsyncSession = Depends(get_db),
+):
+    """
+    搜索视频列表。
+
+    支持三种搜索方式（均返回列表，点击详情查看完整数据）：
+    - star_id: 星图ID精准匹配
+    - unique_id: 达人unique_id精准匹配
+    - nickname: 达人昵称模糊匹配
+
+    Args:
+        request: 搜索请求，包含 type 和 value
+
+    Returns:
+        视频列表（含A3数据和成本指标）
+    """
+    try:
+        if request.type == "star_id":
+            # 星图ID查询，返回视频列表
+            videos = await search_videos_by_star_id(db, request.value)
+            if not videos:
+                return {
+                    "success": True,
+                    "type": "list",
+                    "data": [],
+                    "total": 0,
+                }
+
+            # 获取 A3 数据
+            result = await get_video_list_with_a3(db, videos)
+            return {
+                "success": True,
+                "type": "list",
+                "data": result,
+                "total": len(result),
+            }
+
+        elif request.type == "unique_id":
+            # 达人unique_id查询，返回视频列表
+            videos = await search_videos_by_unique_id(db, request.value)
+            if not videos:
+                return {
+                    "success": True,
+                    "type": "list",
+                    "data": [],
+                    "total": 0,
+                }
+
+            # 获取 A3 数据
+            result = await get_video_list_with_a3(db, videos)
+            return {
+                "success": True,
+                "type": "list",
+                "data": result,
+                "total": len(result),
+            }
+
+        elif request.type == "nickname":
+            # 昵称模糊查询，返回视频列表
+            videos = await search_videos_by_nickname(db, request.value)
+            if not videos:
+                return {
+                    "success": True,
+                    "type": "list",
+                    "data": [],
+                    "total": 0,
+                }
+
+            # 获取 A3 数据
+            result = await get_video_list_with_a3(db, videos)
+            return {
+                "success": True,
+                "type": "list",
+                "data": result,
+                "total": len(result),
+            }
+
+        else:
+            raise HTTPException(status_code=400, detail=f"Invalid search type: {request.type}")
+
+    except ValueError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+    except YuntuAPIError as e:
+        raise HTTPException(status_code=500, detail=f"API Error: {e.message}")
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Internal error: {str(e)}")