Migrate UI tooling to Vite and Vitest

[ruibaby]

What does this PR do?

• Migrates the plugin UI build from Rsbuild to Vite and emits an ESM UI plugin manifest for Halo 2.26.
• Migrates the UI and SDK unit tests from Rstest to Vitest while retaining the existing happy-dom environment.
• Updates dynamic imports, UnoCSS integration, icon generation, and the VueUse integration import for Vite compatibility.
• Removes the direct Rsbuild and Rstest dependencies and regenerates the pnpm lockfile.
• Raises the minimum supported Halo version to 2.26.

Testing

• cd ui && pnpm test:unit — 29 test files, 185 tests
• cd ui && pnpm -C packages/sdk test — 5 test files, 84 tests
• cd ui && pnpm type-check
• cd ui && pnpm -C packages/sdk typecheck
• cd ui && pnpm build-only
• git diff --check
• ./gradlew clean build

Notes

• The UI bundler kit currently uses the temporary pkg.pr.new build for @halo-dev/ui-plugin-bundler-kit@815292f.
• This PR should remain in draft until the corresponding bundler-kit changes are available from a stable dependency source.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@halo-dev/ai-foundation-sdk@95

commit: 0ca088b

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve UnoCSS output for TypeScript-defined classes

When the custom FormKit model selector is rendered, vue-scoped generates styles only from Vue SFCs, but ui/src/formkit/ai-model-selector-input.ts defines :uno: w-full and :uno: !py-0 outside an SFC. Since this change also removes the global uno.css import, those utilities no longer produce CSS, causing the selector wrapper and input padding styles to regress. Move these utilities into the SFC or retain a global/per-module UnoCSS output for non-Vue sources.

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