feat: AI routing DB-driven, payment gateway full integration, WeChat mini-program CI/CD

- AI routing rules now stored in system_configs DB table instead of hardcoded config
- Multi-model support via name|model composite key for same-provider routing
- UnifiedPayService with HMAC-SHA256 gateway integration (alipay/wechat)
- Admin payment panel: list, stats, search, filter, refund
- WeChat mini-program CI/CD via miniprogram-ci (v1.0.9)
- Translation quota extended to LLM provider tier
- SearchService with DB-driven provider config (bing/google_cse/searxng)
- Footer cleanup across admin/workspace/uni-app
- Private key excluded from git tracking

backend/app/services/discovery.py

@@ -1,6 +1,7 @@
 import json
 import logging
 from typing import Dict, Any, Optional, Union
+from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.ai.router import get_ai_router
 from app.services.search_web import search_companies, fetch_page_text
@@ -29,10 +30,11 @@ ANALYZE_MATCH_PROMPT = """你是外贸客户分析专家。分析目标公司的
 
 
 class DiscoveryService:
-    def __init__(self):
+    def __init__(self, db: Optional[AsyncSession] = None):
         ai_router = get_ai_router()
         self.ai = ai_router
         self._ai_available = len(ai_router.providers) > 0
+        self.db = db
 
     async def search(self, product_description: str, target_market: str) -> Dict[str, Any]:
         queries = self._build_queries(product_description, target_market)
@@ -124,6 +126,18 @@ URL: {company_url}
             return self._template_outreach(company_info, product_info)
 
     async def _web_search_all(self, queries: list) -> dict:
+        # Try DB-managed search providers first
+        if self.db:
+            try:
+                from app.services.search import SearchService
+                svc = SearchService(self.db)
+                db_results = await svc.search(queries[0], limit=15)
+                if db_results:
+                    return {"results": self._dedup_and_filter(db_results)[:15], "provider": "db_search"}
+            except Exception as e:
+                logger.warning(f"DB search failed: {e}")
+
+        # Fallback: hardcoded Bing + 360 scraper
         try:
             results = await search_bing_batch(queries[:3], max_per_query=4)
             if results:
@@ -131,6 +145,7 @@ URL: {company_url}
         except Exception as e:
             logger.warning(f"Bing batch search failed: {e}")
 
+        # Fallback: Google CSE from env vars
         results = await search_companies(queries[0], max_results=10)
         if results:
             return {"results": results[:15], "provider": "google_cse"}