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Changelog

All notable changes to PaperLens will be documented in this file.

[1.3.0] - 2026-07-06

Added

  • 13 New Data Sources: DBLP (CS conferences), bioRxiv/medRxiv (preprints), AGRIS (agriculture), ACS Publications, Optica, IOP Publishing, AIP Publishing, RSC Publishing, Europe PMC, Springer Nature, Wiley, IEEE, Project MUSE — total now 26+ sources
  • Liquid Glass Effect: iOS-style frosted glass UI with CSS backdrop-filter across all major components
  • AI Result Count: moved to panel header for better visibility
  • Default Search Range: 10 years default for better initial results

Fixed

  • Search Stability (34 bugs): comprehensive audit fixing pub_type parameter, author search (OR queries, PubMed format conversion, OpenAlex filters), year filtering, journal extraction fallback
  • AI Search: stream output marker display, truncated JSON output, result count selector error
  • History Dropdown: height calculation, overlap with AI panel, click behavior (fills search box only, no auto-search)
  • CNKI Search: browser instance reuse to avoid repeated captcha verification
  • OpenAlex: journal URL length limit
  • Zotero: status check now directly calls backend test API
  • Liquid Glass: removed broken SVG filter causing purple tint and content blur

Changed

  • ROADMAP updated to v2.1 with search stability and UI optimization focus
  • README simplified — removed implementation details from roadmap section

[1.2.3] - 2026-06-09

Added

  • OpenAlex API Key support — OpenAlex now requires API key (free but mandatory). Without key: $0.10/day budget; with free key: $1/day (10x more). Added API key input field in settings panel with test button.
  • Semantic Scholar API Key support — Added config entry and frontend UI for Semantic Scholar API key. Without key: 100 req/5min; with key: 1 req/sec.

Changed

  • Updated OpenAlex search, citation enrichment, and DOI lookup to include API key in all requests
  • Updated server.py to pass API key for all direct OpenAlex API calls (citation graph, related papers, recommendations)
  • Added semantic_scholar section to config.yaml with enabled and api_key fields

[1.2.2] - 2026-06-09

Fixed

  • i18n: Backend error messages now use error codes — all API error responses use language-independent error codes (e.g., no_query, paper_not_found), frontend translates them via te() function
  • i18n: AI assistant error messages — AI error responses now use AI_ERROR: prefix with error codes, frontend translates them via teAI() function
  • i18n: Default collection group name — fixed Temporal Dead Zone bug where collectionsData referenced LANGS before initialization; default group now uses t('defaultGroup') when rendering
  • i18n: PDF download error detection — error checks now use error codes instead of matching translated text strings

Changed

  • Added 20+ error code translations to both Chinese and English LANGS dictionaries
  • Added te() helper function for translating backend error codes
  • Added teAI() helper function for translating AI error responses

[1.2.1] - 2026-06-09

Added

  • New Data Sources: Google Scholar (experimental), CNKI, Wanfang, VIP — all with β badge
  • Keyword Co-occurrence Network: visualize keyword relationships across search results
  • Author Collaboration Network: visualize co-authorship patterns
  • EndNote XML Export: additional export format for Mendeley/EndNote direct import
  • Missing i18n keys: noOALink, analyzingResearchGaps, noDOILoadGraph, querying, query
  • applyLang() now updates all citation graph panel buttons, hints, and legend text dynamically

Fixed

  • i18n: English version had hardcoded Chinese strings — fixed 15+ untranslated Chinese text in JS (error messages, status text, button labels)
  • i18n: Citation graph overlay buttons broken — static HTML used ${t(...)} template literals that don't evaluate in HTML context; replaced with static text + applyLang() dynamic updates
  • i18n: English prompt mixed Chinese — "compare" mode AI prompt contained Chinese text in English context
  • i18n: English translation used Chinese punctuation — enterGroupName used Chinese colon ： instead of :

[1.2.0] - 2026-06-09

Added

  • Chrome Extension: DOI quick-lookup and paper collection while browsing academic websites
    • Auto-detect DOIs on any webpage (meta tags + regex matching)
    • One-click paper lookup via PaperLens API
    • One-click collection to PaperLens
    • Real-time sync notification after collection
  • Collection Management: delete collection groups with confirmation dialog
    • Default collection group cannot be deleted
    • Deleting a group removes all items in it
    • Double confirmation before deletion
  • i18n Improvements: comprehensive translation for all UI elements
    • Citation graph buttons (fullscreen, close, AI analysis, export)
    • Collection panel (refresh, delete group, new group)
    • AI analysis panel (copy, fullscreen, status messages)
    • Graph hints and legend text

Fixed

  • Collection data now auto-refreshes when opening collection panel
  • Periodic polling (every 30 seconds) for collection data sync
  • Chrome extension notifies frontend after successful collection

Changed

  • Added DELETE /api/collections/groups endpoint for collection group deletion
  • Frontend uses translation functions for all dynamic content

[1.1.0] - 2026-06-08

Added

  • Local Paper Collections: star papers to save, custom collection groups, collections sidebar panel
  • Floating Citation Graph: new graph opens as draggable floating window with full toolbar (AI summary/detail/novelty/export)
  • Novelty Detection: AI analysis mode that identifies research gaps, unexplored areas, and promising directions
  • Fullscreen toggle for citation graph with zoom state preservation
  • Reset zoom button in citation graph legend
  • Zoom level percentage display in graph legend
  • Click overlay background to close citation graph
  • Markdown bold (**text**) rendering in AI analysis results

Removed

  • Related Work Discovery: removed due to persistent layout issues (nodes clustering together)

Fixed

  • "Open in new graph" no longer closes the current citation graph
  • Floating graph toolbar now shows automatically after loading
  • Citation graph expand: nodes no longer cluster — deterministic fan-shaped placement outside existing ring
  • Citation graph zoom now centers on mouse cursor position
  • Paper names fully display as zoom level increases (dynamic label length)
  • Main content area no longer hidden behind status bar (added bottom padding)
  • Graph panel fullscreen toggle with smooth CSS transition
  • D3 data join key functions prevent node/link misalignment on expand
  • Zoom behavior cleanup on graph reopen prevents duplicate handlers

Changed

  • Project repositioned from "Search Platform" to "AI-Powered Research Assistant"
  • README.md and README.zh-CN.md fully rewritten with architecture diagram
  • AI analysis prompt for "novelty" mode with 5 dimensions (both Chinese and English)

[1.0.2] - 2026-06-08

Added

  • Interactive citation graph with D3.js force-directed layout
  • Zoom, pan, and drag support in citation graph
  • Click nodes to expand citation relationships dynamically
  • Toolbar in citation graph: AI analysis, export, download, original link
  • AI analysis results displayed within citation graph panel
  • /api/paper-by-doi endpoint for single paper lookup by DOI

Fixed

  • Search button stuck on "searching" after results loaded
  • Language switch not updating search result labels
  • Default year_to in config.yaml (2025 → 2026)

[1.0.1] - 2026-06-08

Fixed

  • Fixed create_window() icon parameter error in pywebview
  • Fixed os.sys reference error in server.py
  • Fixed _last_keywords not initialized in OpenAlexSearch
  • Fixed max_tokens set to 384000 (now 4096)
  • Fixed hardcoded year 2026 (now dynamic)
  • Removed dead code get_icon_path() in main.py
  • Moved import json to top level in server.py

Added

  • Copy button for AI analysis results
  • Retry button on network errors
  • Reset settings to default button
  • Better error messages for PDF download failures

[1.0.0] - 2026-06-08

Added

  • PubMed + OpenAlex dual-source search with automatic deduplication
  • AI-powered natural language search (Chinese and English)
  • AI paper analysis: summary, detailed analysis, and multi-paper comparison
  • Streaming output for AI analysis
  • Dual AI model configuration (separate models for search and analysis)
  • Batch DOI import
  • RIS, BibTeX, and CSV export
  • Advanced filtering: journal, field tags, year range, publication type
  • In-result sorting by citations, date, and title
  • Search history with server-side persistence
  • User preference persistence (year range, sort, filters)
  • Dynamic placeholder with rotating suggestions
  • Clickable suggestion chips
  • OA paper PDF link verification
  • Settings panel with proxy configuration
  • XSS protection throughout
  • Escape key to close modals
  • Cross-page checkbox persistence
  • Auto-detection of current year for date range
  • Standalone Windows executable via PyInstaller