refactor(ui+skills): split import.ts + primitives.tsx god files
Two more > 400 LOC modules split along responsibility seams. Zero
behavior change — public APIs re-export from the original file paths,
so every consumer import stays working.
| Original | Split into | LOC each |
|---------------------------------------|-------------------------------|----------|
| src/main/skills/import.ts (458) | import (orchestrator) / | 132 |
| | discovery (findSkillMdFiles, | 153 |
| | buildLocalInventory) | |
| | materialize | 24 |
| | import-local | 147 |
| | import-url | 85 |
| src/renderer/components/ui/ | primitives (barrel re-export) | 11 |
| primitives.tsx (419) | Card / Eyebrow / Badge / | 9–59 |
| | Spinner / Panel / Field / | each |
| | Input / Select / TextArea / | |
| | ActionButton / SectionButton | |
`createSkillImporter` still returns `{ importFromSource, importFromGitHub,
importFromLocal, importFromUrl, cleanupSkillFiles, parseGitHubUrl,
findSkillMdFiles, buildLocalInventory }` — every existing consumer
resolves unchanged.
`primitives.tsx` is now a pure barrel re-exporting the 11 primitives.
Consumers can migrate to direct imports (`../ui/Card`) opportunistically
but the barrel path keeps working.
ZacharyZhang-NY
00b0e0aaed