feat: add gallery page with image and video details, including upload and generation status

Co-authored-by: Copilot <copilot@github.com>

frontend/app/main.py

@@ -187,6 +187,63 @@ def dashboard():
                            generated_videos=generated_videos)
 
 
+@app.get("/gallery")
+@login_required
+def gallery():
+    token = session["access_token"]
+
+    # Fetch all content types
+    uploads_resp = _api("GET", "/images/", token=token)
+    uploads = uploads_resp.json() if uploads_resp.status_code == 200 else []
+
+    gen_images_resp = _api("GET", "/generate/images", token=token)
+    generated_images = gen_images_resp.json(
+    ) if gen_images_resp.status_code == 200 else []
+
+    videos_resp = _api("GET", "/generate/videos", token=token)
+    videos = videos_resp.json() if videos_resp.status_code == 200 else []
+
+    # Separate pending videos
+    pending_videos = [v for v in videos if v.get(
+        "status") not in ("completed", "failed")]
+    completed_videos = [v for v in videos if v.get("status") == "completed"]
+
+    return render_template(
+        "gallery.html",
+        uploads=uploads,
+        generated_images=generated_images,
+        pending_videos=pending_videos,
+        completed_videos=completed_videos,
+    )
+
+
+@app.get("/gallery/image/<image_id>")
+@login_required
+def image_detail(image_id: str):
+    token = session["access_token"]
+    resp = _api("GET", f"/generate/images/{image_id}", token=token)
+    image = resp.json() if resp.status_code == 200 else None
+    return render_template("image_detail.html", image=image)
+
+
+@app.get("/gallery/video/<video_id>")
+@login_required
+def video_detail(video_id: str):
+    token = session["access_token"]
+    resp = _api("GET", f"/generate/videos/{video_id}", token=token)
+    video = resp.json() if resp.status_code == 200 else None
+    return render_template("video_detail.html", video=video)
+
+
+@app.get("/gallery/upload/<image_id>")
+@login_required
+def upload_detail(image_id: str):
+    token = session["access_token"]
+    resp = _api("GET", f"/images/{image_id}", token=token)
+    image = resp.json() if resp.status_code == 200 else None
+    return render_template("upload_detail.html", image=image)
+
+
 # ── Generate ──────────────────────────────────────────────────────────────
 
 @app.get("/images/<image_id>/file")