fix: consolidated critical fixes — LFS, Windows, model input, SKILL.MD case, bootstrap, route selection

[rollroyces]

Summary

Consolidated fix for 6 critical open issues. All changes are cherry-picked from existing open PRs that were never merged, plus a manual LFS budget fix.

Fixes

🚨 Issue #48 — Git LFS budget exceeded (blocks all clones)

• Removed ALL LFS tracking from .gitattributes (*.gif, *.png, *.mp4, *.mov, etc.)
• Downloaded all assets from CDN and re-added as regular git blobs
• Fixes Git LFS (Large File Storage) 存储空间超支 #48 — new clones no longer fail with LFS budget errors

🚨 Issue #28 — npm run dev fails on Windows (spawn npm ENOENT)

• Added cross-platform npm detection: npm.cmd on Windows, npm otherwise
• Added { shell: true } for Windows spawn
• Fixes npm run dev fails on Windows with Error: spawn npm ENOENT (Windows 兼容性问题) #28 (cherry-picked from PR fix: resolve spawn npm ENOENT on Windows by using npm.cmd with shell: true #74)

🚨 Issue #21 — Model ID input only accepts 1 character

• Changed from controlled useState to uncontrolled useRef for the custom model ID input
• Fixes 配置模型ID每次只能输入一个字母 #21 (cherry-picked from PR fix: resolve model ID input field accepting only single character #73)

🟠 Issue #40 — Route UI cannot select configured models

• Clearer placeholder text when no models are configured
• Fixes [BUG] 路由界面无法选择模型 #40 (cherry-picked from PR fix: ensure configured provider models appear in route selection #75)

🟡 Issue #37 — SKILL.MD filenames case-sensitive check fails

• Added findSkillMdFile() helper that matches /^skill\.md$/iu
• Replaced all hardcoded "SKILL.md" references with case-insensitive lookup
• Fixes 无法识别.MD技能文件 #37 (cherry-picked from PR fix: accept case-insensitive SKILL.md filenames #44)

🟡 Issue #36 — npm start/npm server skips bootstrap config

• Added prestart hook in ui/package.json to run bootstrap-pilotdeck-config.mjs
• Fixes feat(windows): automatic configuration generation for npm start and npm server #36 (cherry-picked from PR fix/windows-auto-bootstrap #39)

Notes

• Preserved Volcano Ark provider (PR fix: add Volcano Ark (火山方舟) API provider support and fix validation #76) — restored catalog/providers.ts and catalogProviders.ts after PRs 74/75 inadvertently removed it
• Total: 55 files changed, 281 insertions(+), 351 deletions(-)

Testing

• npm run build passes
• All assets are real binary blobs (not LFS pointers)
• Windows compatibility verified for dev-launcher.mjs
• SkillManager handles SKILL.MD, skill.md, SKILL.md case variants