test: refine Istanbul/Vitest coverage exclude globs

[xxiaoxiong]

Summary

Refines test coverage exclusions to exclude generated files and shadcn/ui components, as requested in #596.

Changes

Added the following exclusions to vitest.config.ts coverage configuration:

1. Generated files

'**/*.gen.ts',
'**/*.gen.tsx',
'renderer/src/route-tree.gen.ts',

Rationale: These files are auto-generated (e.g., by TanStack Router plugin) and should not be modified or tested directly.

2. shadcn/ui components

'renderer/src/common/components/ui/**',

Rationale: As mentioned in the issue, shadcn/ui components are generated/copied from the shadcn/ui library and should almost never be individually tested in this project. Testing them would:

• Inflate coverage metrics without adding value
• Test third-party code rather than project-specific logic
• Create maintenance burden for code we don't own

Impact

Before

• Coverage included auto-generated files
• Coverage included third-party UI components
• Metrics were inflated with non-project code

After

• Coverage focuses on project-specific code
• More accurate representation of actual test coverage
• Overall coverage percentage should rise (as stated in issue)

Testing

Verification steps

1. Run tests with coverage:

   pnpm run test:coverage

2. Verify that coverage report excludes:

   • renderer/src/route-tree.gen.ts
   • All files in renderer/src/common/components/ui/
   • Any other *.gen.ts or *.gen.tsx files

3. Confirm CI still passes

Expected results

• CI passes
• Coverage percentage increases (excludes untested generated code)
• Coverage report is cleaner and more focused

Related

• Fixes Test coverage: Refine Istanbul/Vitest exclude globs #596

Fixes #596

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[chatgpt-codex-connector]

Narrow the UI coverage exclusion to generated shadcn files

This blanket exclude hides coverage for every component in renderer/src/common/components/ui, but that directory also contains project-specific code such as file-picker-input.tsx, loading-state-alert.tsx, input-search.tsx, and circular-status-icon.tsx, not just copied shadcn primitives. In coverage runs, bugs or untested branches in those local components will no longer be reflected at all, which makes the coverage report less accurate than before; please exclude only the actual generated shadcn primitives or move custom components out of this excluded path.

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[Copilot]

Pull request overview

Refines Vitest coverage exclusions to omit generated code and vendor-copied UI components, aligning coverage reporting with project-owned logic (per #596).

Changes:

• Excludes generated files from coverage via **/*.gen.ts, **/*.gen.tsx, and renderer/src/route-tree.gen.ts.
• Excludes renderer/src/common/components/ui/** from coverage to omit shadcn/ui-derived components.