feat: Enhance patent search and update research documentation

- Improve patent search service with expanded functionality
- Update PatentSearchPanel UI component
- Add new research_report.md
- Update experimental protocol, literature review, paper outline, and theoretical framework

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

backend/app/routers/patent_search.py

@@ -1,4 +1,4 @@
-"""Patent Search Router - Search for similar patents"""
+"""Patent Search Router - Search for similar patents using Lens.org API"""
 
 import logging
 from typing import Optional, List
@@ -21,16 +21,20 @@ class PatentSearchRequest(BaseModel):
 
 
 class PatentResult(BaseModel):
-    """Single patent result"""
-    publication_number: str
+    """Single patent result from Lens.org"""
+    lens_id: str
+    doc_number: str
+    jurisdiction: str
+    kind: str
     title: str
-    snippet: str
-    publication_date: Optional[str] = None
-    assignee: Optional[str] = None
-    inventor: Optional[str] = None
-    status: str                         # ACTIVE, NOT_ACTIVE, UNKNOWN
-    pdf_url: Optional[str] = None
-    thumbnail_url: Optional[str] = None
+    abstract: Optional[str] = None
+    date_published: Optional[str] = None
+    applicants: List[str] = []
+    inventors: List[str] = []
+    legal_status: Optional[str] = None
+    classifications_cpc: List[str] = []
+    families_simple: List[str] = []
+    url: str
 
 
 class PatentSearchResponse(BaseModel):
@@ -68,7 +72,7 @@ async def search_patents(request: PatentSearchRequest):
     """
     Search for patents similar to the given description/query.
 
-    Uses Google Patents to find related patents based on keywords.
+    Uses Lens.org API to find related patents based on title, abstract, and claims.
     """
     logger.info(f"Patent search request: {request.query[:100]}...")