refactor: replace dynamic imports with static imports in app/src

[graycyrus]

Summary

• Replace all 8 dynamic import() calls across 6 files in app/src/ with static top-level imports
• Remove stale "Tech debt" note from CLAUDE.md since all listed files have been migrated
• Existing try/catch guards preserved for Tauri/non-Tauri environment safety

Files changed

File	Change
lib/skills/skillEvents.ts	await import('@tauri-apps/api/event') → static import
lib/skills/manager.ts	await import('coreRpcClient') x2 → static import
components/skills/SkillSetupWizard.tsx	await import('skillsApi') x2 → static import
components/settings/panels/MessagingPanel.tsx	import().then() chain → static import + direct call
hooks/useToolsUpdates.ts	await import('file-watcher') → static import
utils/desktopDeepLinkListener.ts	await import('skillsApi') → static import, merged duplicate
CLAUDE.md	Removed stale tech debt note

Test plan

• yarn typecheck — passes
• yarn lint — passes (0 errors)
• yarn format:check — passes
• yarn build — passes
• yarn tauri dev — app launches, core connects
• Zero dynamic imports remaining in app/src/ (verified via grep)

Closes #102