feat(auth): attach accessToken to session and redirect to /auth/callback

expose GitHub accessToken on session for post-auth state sync
set GitHub sign-in callbackUrl to /auth/callback to complete login flow

Author: HazarBakir

src/app/api/auth/[...nextauth]/route.ts

@@ -85,6 +85,9 @@ const authOptions = {
       if (token.login && session.user) {
         session.user.login = token.login 
       }
+      if (token.accessToken) {
+        session.accessToken = token.accessToken
+      }
       return session
     },
     async redirect({ url, baseUrl }: { url: string; baseUrl: string }) {

src/app/login/page.tsx

@@ -47,7 +47,7 @@ function LoginContent() {
             </div>
 
             <Button
-              onClick={() => signIn('github')}
+              onClick={() => signIn('github', { callbackUrl: '/auth/callback' })}
               className="w-full h-12 font-semibold text-base"
               size="lg"
             >

src/lib/api/github-api-client.ts

@@ -238,8 +238,23 @@ class GitHubAPIClient {
 
       const data = await response.json()
 
-      // Check rate limit status
-      // Rate limit headers available but not currently used
+      if (typeof window !== 'undefined') {
+        const updateRateLimit = (window as typeof window & { updateRateLimit?: (headers: Headers) => void }).updateRateLimit
+        if (updateRateLimit) {
+          const headers = new Headers()
+          const remaining = response.headers.get('x-ratelimit-remaining') || response.headers.get('X-RateLimit-Remaining')
+          const limit = response.headers.get('x-ratelimit-limit') || response.headers.get('X-RateLimit-Limit')
+          const reset = response.headers.get('x-ratelimit-reset') || response.headers.get('X-RateLimit-Reset')
+          const used = response.headers.get('x-ratelimit-used') || response.headers.get('X-RateLimit-Used')
+          if (remaining && limit && reset) {
+            headers.set('x-ratelimit-remaining', remaining)
+            headers.set('x-ratelimit-limit', limit)
+            headers.set('x-ratelimit-reset', reset)
+            if (used) headers.set('x-ratelimit-used', used)
+            updateRateLimit(headers)
+          }
+        }
+      }
 
       this.cache.set(cacheKey, { data, timestamp: Date.now() })
       return data

src/lib/api/github-graphql-client.ts

@@ -182,7 +182,9 @@ class GitHubGraphQLClient {
           const headers = new Headers()
           headers.set('x-ratelimit-remaining', data.data.rateLimit.remaining.toString())
           headers.set('x-ratelimit-limit', data.data.rateLimit.limit.toString())
-          headers.set('x-ratelimit-reset', new Date(data.data.rateLimit.resetAt).getTime().toString())
+          // normalize reset to seconds since epoch to match UI multiplier
+          const resetSeconds = Math.floor(new Date(data.data.rateLimit.resetAt).getTime() / 1000)
+          headers.set('x-ratelimit-reset', resetSeconds.toString())
           headers.set('x-ratelimit-used', (data.data.rateLimit.limit - data.data.rateLimit.remaining).toString())
           updateRateLimit(headers)
         }