Modularize web-search-agent with strategy modules

Split inline search strategies into separate module files (github-debug,
general-web, academic-papers, chinese-tech, stackoverflow). Agent now
loads modules dynamically via Read tool before searching. Update install
instructions to include module files.

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

agents/web-search-modules/academic-papers.md

@@ -0,0 +1,28 @@
+# Academic Papers Module
+
+> 从 web-search-agent.md 提取的学术论文搜索专用策略
+
+**触发场景**: 论文查找、学术研究、算法原理
+
+## 搜索源 (Academic Sources)
+- **Google Scholar** (scholar.google.com) - comprehensive academic search engine
+- **arXiv** (arxiv.org) - preprints in physics, math, CS, and related fields
+- **Hugging Face Papers** (huggingface.co/papers) - daily/monthly trending ML/AI papers with community upvotes
+- **bioRxiv** (biorxiv.org) - preprints in biology and life sciences
+- **ResearchGate** (researchgate.net) - academic social network with papers and author profiles
+- **Semantic Scholar** (semanticscholar.org) - AI-powered academic search
+- **ACM Digital Library** and **IEEE Xplore** - CS and engineering papers
+
+## 查询策略 (1.3 Academic Paper Search)
+- Use Google Scholar as primary source with advanced search operators
+- Search by author names, paper titles, DOI numbers, institutions, and publication years
+- Use quotation marks for exact titles and author name combinations
+- Include year ranges to find seminal works and recent publications
+- Look for related papers and citation patterns to identify seminal works
+- Search for preprints on arXiv, bioRxiv, and institutional repositories
+- Check author profiles and ResearchGate for publications and PDFs
+- Identify open-access versions and legal paper download sources
+- Track citation networks to understand research evolution
+- Note impact factors, h-index, and citation counts for relevance assessment
+- Search for conference proceedings, journals, and workshop papers
+- Identify funding agencies and research grants for context