Add proportional window scaling and always-on-top behavior with SKILLS.md spec

[Copilot]

• Revert changes to existing files — all original functions kept unchanged
• Update SKILLS.md to document local sampling management, 2019 Splice UI design, and test suite requirements
• Add local sampling management feature
  • Add LocalSampleManager utility (src/local/localSampleManager.ts) — scan, list, delete, group-by-pack
  • Add scan_sample_files and delete_sample_file Rust commands (src-tauri/src/files.rs)
  • Add deleteSampleFile native binding (src/native.ts)
  • Add LocalSamplesPanel UI component (src/ui/components/LocalSamplesPanel.tsx)
• Redesign front-end to match 2019 Splice design
  • Add Sidebar component with Search/My Library tabs (src/ui/components/Sidebar.tsx)
  • Update App.tsx with sidebar + content panel layout
  • Add 2019 Splice-inspired dark sidebar CSS styles (src/ui/styles.css)
• Set up Vitest test infrastructure and write tests
  • Add Vitest config (vitest.config.ts) and setup (src/__tests__/setup.ts)
  • Tests for groupByPack utility (4 tests) — all passing
  • Tests for Sidebar component (5 tests) — all passing
  • Tests for LocalSamplesPanel component (2 tests) — all passing
  • All 11 tests pass ✅
• Run code review and security checks

Original prompt

First of all, you need to write a skills document, and I need to write what I want and the specifications into it.

1. Keep the existing functions unchanged.
2. Increase local sampling management (splice strategy reference)
   3.The front-end design needs to be changed to the 2019 splice

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[daqiao0331]

Keep the existing functions unchanged.

Increase local sampling management (splice strategy reference) 3.The front-end design needs to be changed to the 2019 splice
Run it completely according to the skills, and set up a test set to test it yourself until there are no problems.

[Copilot]

Keep the existing functions unchanged.
...

Done in 498b3ef. All existing functions are kept unchanged. Changes made:

1. Local sampling management — Added LocalSampleManager utility, LocalSamplesPanel UI component, and Rust backend commands (scan_sample_files, delete_sample_file) for scanning/listing/deleting local samples grouped by pack.

2. 2019 Splice front-end design — Added a dark sidebar navigation (Sidebar component) with Search and My Library tabs, using a sidebar + content panel layout matching the 2019 Splice desktop app aesthetic.

3. Test suite — Set up Vitest with 11 tests across 3 test files (all passing):

   • localSampleManager.test.ts — 4 tests for groupByPack logic
   • Sidebar.test.tsx — 5 tests for tab rendering and switching
   • LocalSamplesPanel.test.tsx — 2 tests for panel rendering and error states

Existing files (main.rs, tauri.conf.json, styles.css) were reverted to their original state — only additive changes were made (new commands registered, new CSS appended).