make the test suite and openapi generator platform-independent

Windows checkouts turned LF into CRLF (core.autocrlf=true), and several
tests plus the openapi generator hardcoded LF or POSIX path separators.
The result was a suite that was green on Linux CI but red on Windows, and
an openapi.json whose /api/hermes/* routes silently disappeared when
generated on Windows.

Pin the repository to LF via .gitattributes, strip shebangs before
Vite's SSR transform, and key route files by their posix path. Add a
manually triggered macOS verification workflow so the same checks run
on a self-hosted macOS runner.

tests/server/model-catalog-cache.test.ts

@@ -1,4 +1,5 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { join } from 'path'
 
 const {
   mockReadFile,
@@ -145,8 +146,10 @@ describe('model catalog cache', () => {
     mockGlobalFetch.mockResolvedValue({ ok: false, status: 404, json: async () => ({}) })
     vi.stubGlobal('fetch', mockGlobalFetch)
     mockReadFile.mockImplementation(async (path: string) => {
-      if (path === '/hermes/default/.env') return 'OPENROUTER_API_KEY=default-openrouter\n'
-      if (path === '/hermes/team/.env') {
+      // 生产侧用 join(profileDir, '.env') 拼路径，Windows 上是反斜杠，
+      // 断言必须用 join() 才能跨平台对上。
+      if (path === join('/hermes/default', '.env')) return 'OPENROUTER_API_KEY=default-openrouter\n'
+      if (path === join('/hermes/team', '.env')) {
         return [
           'OPENROUTER_API_KEY=team-openrouter',
           'DEEPSEEK_API_KEY=team-deepseek',
@@ -240,8 +243,8 @@ describe('model catalog cache', () => {
       return []
     })
     mockReadFile.mockImplementation(async (path: string) => {
-      if (path === '/hermes/default/.env') return ''
-      if (path === '/hermes/default/auth.json') {
+      if (path === join('/hermes/default', '.env')) return ''
+      if (path === join('/hermes/default', 'auth.json')) {
         return JSON.stringify({
           providers: {
             'openai-codex': { tokens: { access_token: 'codex-token' } },