feat(asl): Week 2 Day 2 - Excel import with template download and intelligent dedup

Features:
- feat: Excel template generation and download (with examples)
- feat: Excel file parsing in memory (cloud-native, no disk write)
- feat: Field validation (title + abstract required)
- feat: Smart deduplication (DOI priority + Title fallback)
- feat: Literature preview table with statistics
- feat: Complete submission flow (create project + import literatures)

Components:
- feat: Create excelUtils.ts with full Excel processing toolkit
- feat: Enhance TitleScreeningSettings page with upload/preview/submit
- feat: Update API interface signatures and export unified aslApi object

Dependencies:
- chore: Add xlsx library for Excel file processing

Ref: Week 2 Frontend Development - Day 2
Scope: ASL Module MVP - Title Abstract Screening
Cloud-Native: Memory parsing, no file persistence

docs/_templates/API设计-模板.md

@@ -477,3 +477,4 @@ curl -X POST "http://localhost:3001/api/v1/xxx/resources" \
 
 
 
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docs/_templates/README.md

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docs/_templates/[AI对接] 快速上下文-模板.md

@@ -182,3 +182,4 @@ POST   /api/v1/[module]/[resource2]
 
 
 
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docs/_templates/数据库设计-模板.md

@@ -222,3 +222,4 @@ INSERT INTO xxx_schema.xxx_table_name (field_name, status) VALUES
 
 
 
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docs/_templates/模块README-模板.md

@@ -89,3 +89,4 @@
 
 
 
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