feat: consolidate roadmap documents into a unified source and archive legacy files

Author: PythonSmall-Q

CHANGELOG.md

@@ -87,7 +87,7 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ### Changed
 
-- Consolidated roadmap governance into a single canonical local-first source at `docs/ROADMAP_v2.0.0.md`.
+- Consolidated roadmap governance into the unified canonical source at `docs/ROADMAP.md`.
 - Archived the parallel roadmap track to avoid split planning ownership and version drift.
 - Normalized core desktop release metadata to `2.0.0` across npm, Tauri, and Windows MSIX manifest sources.
 - Added advanced Browser Usage date-range exploration with local saved views (custom range, save/apply/delete presets).

README.md

@@ -166,8 +166,7 @@ Please read [CONTRIBUTING.md](CONTRIBUTING.md) before submitting pull requests.
 
 ## 🗺 Roadmap
 
-- [Roadmap to v2.0.0 (Local-First)](docs/ROADMAP_v2.0.0.md)
-- [Roadmap Post-v2.0.0 (Extension Platform)](docs/ROADMAP_POST_v2.0.0.md)
+- [Unified Roadmap](docs/ROADMAP.md)
 
 ---
 

README_zh.md

@@ -164,8 +164,7 @@ TimeLens/
 
 ## 🗺 路线图
 
-- [v2.0.0 路线图（本地优先）](docs/ROADMAP_v2.0.0.md)
-- [v2.0.0 之后路线图（扩展平台）](docs/ROADMAP_POST_v2.0.0.md)
+- [统一路线图](docs/ROADMAP.md)
 
 ---