Upgrade all dependencies to latest versions

[Copilot]

This PR upgrades all dependencies in the repository to their latest versions, including major version updates that required breaking change handling.

Major Updates

UnoCSS Ecosystem (0.63.4 → 66.3.3)

• @unocss/core, @unocss/rule-utils, @unocss/preset-uno, @unocss/reset, unocss
• Updated peer dependency requirement from >= 0.52.0 to >= 66.0.0

Development Tools

• ESLint: 9.13.0 → 9.32.0
• TypeScript: 5.6.3 → 5.8.3
• @antfu/eslint-config: 3.8.0 → 5.0.0 (major)
• Vitest: 2.1.3 → 3.2.4 (major)
• Unbuild: 2.0.0 → 3.6.0 (major)
• Bumpp: 9.7.1 → 10.2.1 (major)

Frontend Dependencies (Playground)

• Vue: 3.5.12 → 3.5.18
• Vite: 5.4.9 → 7.0.6 (major)
• @vitejs/plugin-vue: 5.1.4 → 6.0.1 (major)
• vue-tsc: 2.1.6 → 3.0.4 (major)

Breaking Changes Handled

UnoCSS v66 API Changes

The most significant change was in UnoCSS v66 where createGenerator now returns a Promise instead of a direct instance:

// Before (v0.63.4)
const uno = createGenerator(config)
const { css } = await uno.generate(code)

// After (v66.3.3)
const uno = await createGenerator(config)  // Now requires await
const { css } = await uno.generate(code)

Updated all test files to properly handle the new async API by making the createUno helper function async and adding await to all generator creation calls.

Test Snapshot Updates

Updated playground build test snapshots to reflect changes in CSS output format from the new UnoCSS version.

ESLint Configuration

Applied auto-fixes for new linting rules from @antfu/eslint-config v5, including import sorting and indentation adjustments.

Validation

All functionality has been verified to work correctly:

• ✅ Build: Package builds successfully with unbuild v3.6.0
• ✅ Tests: All 12 tests pass with vitest v3.2.4
• ✅ Linting: Code passes ESLint v9.32.0 with new config
• ✅ Type Checking: TypeScript v5.8.3 compilation succeeds
• ✅ Playground: Vue 3.5.18 + Vite 7.0.6 builds successfully

The preset functionality remains unchanged - this is purely a dependency maintenance update with necessary compatibility fixes.

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