fix(ui): proxy github api requests through backend to avoid rate limit 403s

backend/app/main.py

@@ -77,10 +77,12 @@ logger.info(f"CORS origins: {settings.cors_origins}")
 from app.routes.auth import router as auth_router
 from app.routes.documents import router as documents_router
 from app.routes.chat import router as chat_router
+from app.routes.github import router as github_router
 
 app.include_router(auth_router, prefix="/api/v1")
 app.include_router(documents_router, prefix="/api/v1")
 app.include_router(chat_router, prefix="/api/v1")
+app.include_router(github_router, prefix="/api/v1")
 
 
 # ── Health Check ─────────────────────────────────────

backend/app/routes/github.py

@@ -0,0 +1,55 @@
+import json
+import time
+import urllib.request
+from urllib.error import URLError, HTTPError
+from fastapi import APIRouter, HTTPException
+
+router = APIRouter()
+
+CACHE = {
+    "contribs": {"data": None, "timestamp": 0},
+    "repo": {"data": None, "timestamp": 0}
+}
+TTL = 3600  # 1 hour cache to avoid 403 Rate Limit
+
+REPO = "param20h/PDF-Assistant-RAG"
+
+def fetch_github(url: str, cache_key: str):
+    now = time.time()
+    if CACHE[cache_key]["data"] is not None and now - CACHE[cache_key]["timestamp"] < TTL:
+        return CACHE[cache_key]["data"]
+    
+    req = urllib.request.Request(url, headers={
+        "Accept": "application/vnd.github.v3+json",
+        "User-Agent": "PDF-Assistant-RAG"
+    })
+    
+    try:
+        with urllib.request.urlopen(req) as response:
+            data = json.loads(response.read().decode())
+            CACHE[cache_key]["data"] = data
+            CACHE[cache_key]["timestamp"] = now
+            return data
+    except HTTPError as e:
+        # Fallback to cache if rate limited
+        if CACHE[cache_key]["data"] is not None:
+            return CACHE[cache_key]["data"]
+        raise HTTPException(status_code=e.code, detail="GitHub API Error")
+    except URLError as e:
+        if CACHE[cache_key]["data"] is not None:
+            return CACHE[cache_key]["data"]
+        raise HTTPException(status_code=500, detail="Failed to connect to GitHub")
+
+@router.get("/github/stats")
+def get_github_stats():
+    contribs = fetch_github(f"https://api.github.com/repos/{REPO}/contributors?per_page=30", "contribs")
+    repo = fetch_github(f"https://api.github.com/repos/{REPO}", "repo")
+    
+    return {
+        "contributors": contribs if isinstance(contribs, list) else [],
+        "stats": {
+            "stargazers_count": repo.get("stargazers_count", 0),
+            "forks_count": repo.get("forks_count", 0),
+            "open_issues_count": repo.get("open_issues_count", 0)
+        }
+    }

frontend/src/components/layout/ContributorsPanel.tsx

@@ -3,6 +3,7 @@
 import { useState, useEffect } from "react";
 import { GitBranch, Star, GitPullRequest, Users, X, Trophy, ExternalLink } from "lucide-react";
 import { Button } from "@/components/ui/button";
+import { api } from "@/lib/api";
 
 interface Contributor {
   login: string;
@@ -25,13 +26,10 @@ export default function ContributorsPanel({ onClose }: { onClose: () => void })
   const REPO = "param20h/PDF-Assistant-RAG";
 
   useEffect(() => {
-    Promise.all([
-      fetch(`https://api.github.com/repos/${REPO}/contributors?per_page=30`).then((r) => r.json()),
-      fetch(`https://api.github.com/repos/${REPO}`).then((r) => r.json()),
-    ])
-      .then(([contribs, repo]) => {
-        setContributors(Array.isArray(contribs) ? contribs : []);
-        setStats(repo);
+    api.get<{ contributors: Contributor[], stats: RepoStats }>("/api/v1/github/stats")
+      .then((data) => {
+        setContributors(Array.isArray(data.contributors) ? data.contributors : []);
+        setStats(data.stats);
       })
       .catch(() => {})
       .finally(() => setLoading(false));
@@ -58,7 +56,7 @@ export default function ContributorsPanel({ onClose }: { onClose: () => void })
             </div>
             <div>
               <h2 className="font-bold text-base">Hall of Fame</h2>
-              <p className="text-xs text-muted-foreground">GSSOC Contributors — thank you! 🎉</p>
+              <p className="text-xs text-muted-foreground">Contributors — thank you! 🎉</p>
             </div>
           </div>
           <Button variant="ghost" size="icon" className="h-8 w-8" onClick={onClose}>