Run UI unit tests in CI

[Hona]

Summary

• preserve final newline semantics when reconstructing file contents from unified patches for UI diffs
• add coverage for \ No newline at end of file markers
• wire @opencode-ai/ui unit tests into the existing bun turbo test:ci unit matrix

Tests

• bun test src in packages/ui
• bun typecheck in packages/ui
• bun turbo test:ci --filter=@opencode-ai/app --filter=@opencode-ai/ui
• push hook: bun turbo typecheck

Note: .opencode/opencode.jsonc remains an unrelated local change and is not included.

[Copilot]

Pull request overview

This PR updates the UI unified-diff normalization logic so reconstructed “before/after” file contents preserve end-of-file newline semantics (including \ No newline at end of file markers), and wires @opencode-ai/ui unit tests into the repo’s existing bun turbo test:ci CI execution/reporting flow.

Changes:

• Preserve missing-final-newline semantics when rebuilding file contents from unified patches in session-diff.ts.
• Add a unit test covering \ No newline at end of file handling.
• Add test / test:ci scripts for @opencode-ai/ui and register Turbo task overrides so CI can execute and publish JUnit results.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
turbo.json	Adds Turbo task overrides for @opencode-ai/ui test and test:ci (with JUnit outputs).
packages/ui/src/components/session-diff.ts	Tracks per-line newline presence and applies \ No newline at end of file markers when reconstructing before/after content.
packages/ui/src/components/session-diff.test.ts	Adds coverage to ensure missing final newline markers are preserved in UI diff text output.
packages/ui/package.json	Introduces test and test:ci scripts (including JUnit reporter output) for CI integration.

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