fix(docs): deploy on blog changes, correct GitHub repo, stop cross-locale homepage caching (#13)

Three fixes prompted by live-site issues:

1. deploy-docs.yml only triggered on content/docs/** — blog-only changes
   (like the expanded 'extend existing systems' post in #12) never deployed.
   Add content/blog/** to the path filter.

2. gitConfig.repo was 'spec' → the navbar GitHub link and the docs
   'edit this page' link pointed at objectstack-ai/spec. Correct to
   objectstack-ai/objectos (where this content actually lives).

3. The prefix-less homepage ('/') is statically cached with
   s-maxage=31536000 and no Vary on Accept-Language. Its body, however,
   is language-negotiated by middleware — so a shared cache stored the
   English homepage at '/' and served it to every visitor, and non-English
   browsers stopped being redirected to their localized path. Mark the
   default-locale rewrite response 'private, no-cache' so the edge never
   shares it and middleware re-runs language detection per request.
   (Verified the redirect logic itself is correct: a cache-miss request
   with Accept-Language: zh-CN already 307s to /zh-Hans.)

Co-authored-by: Jack Zhuang <277994282+os-zhuang@users.noreply.github.com>

Author: xuyushun441-sys

.github/workflows/deploy-docs.yml

@@ -6,6 +6,7 @@ on:
     paths:
       - 'apps/docs/**'
       - 'content/docs/**'
+      - 'content/blog/**'
       - 'pnpm-lock.yaml'
       - '.github/workflows/deploy-docs.yml'
   workflow_dispatch:

apps/docs/lib/layout.shared.tsx

@@ -3,7 +3,7 @@ import Image from 'next/image';
 
 export const gitConfig = {
   user: 'objectstack-ai',
-  repo: 'spec',
+  repo: 'objectos',
   branch: 'main',
 };
 

apps/docs/middleware.ts

@@ -157,7 +157,16 @@ export default function middleware(request: NextRequest) {
     const url = new URL(request.url);
     // Handle root path specially to avoid double slashes
     url.pathname = pathname === '/' ? `/${i18n.defaultLanguage}` : `/${i18n.defaultLanguage}${pathname}`;
-    return NextResponse.rewrite(url);
+    const response = NextResponse.rewrite(url);
+    // This is a locale-negotiated response for a prefix-less path (e.g. "/").
+    // The underlying page is statically cached with a long s-maxage, but the
+    // *result here depends on the visitor's language* — so it must never be
+    // stored in a shared cache, or the CDN would serve this (default-locale)
+    // HTML to every visitor and non-English browsers would stop being
+    // redirected to their localized path. Mark it private so the edge skips it
+    // and middleware re-runs language detection on every request.
+    response.headers.set('Cache-Control', 'private, no-cache, must-revalidate');
+    return response;
   }
 
   // For non-default languages, redirect to the localized path