Add blueprints for authentication, admin, dashboard, gallery, generation, and profile routes

- Created `__init__.py` for blueprint registration.
- Implemented `auth.py` for user authentication (login, register, logout).
- Added `admin.py` for admin functionalities (user management, stats).
- Developed `dashboard.py` for user dashboard displaying user info and generated content.
- Created `gallery.py` for managing and displaying images and videos.
- Implemented `generate.py` for text, image, and video generation functionalities.
- Added `profile.py` for user profile management.
- Updated templates to reflect new route structures and improve navigation.

frontend/app/routes/gallery.py

@@ -0,0 +1,75 @@
+"""Gallery blueprint."""
+from flask import Blueprint, Response, render_template, session
+
+from ..helpers import _api, login_required
+
+gallery_bp = Blueprint("gallery", __name__)
+
+
+@gallery_bp.get("/gallery")
+@login_required
+def index():
+    token = session["access_token"]
+
+    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 []
+
+    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,
+    )
+
+
+@gallery_bp.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)
+
+
+@gallery_bp.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)
+
+
+@gallery_bp.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)
+
+
+@gallery_bp.get("/images/<image_id>/file")
+@login_required
+def serve_uploaded_image(image_id: str):
+    resp = _api("GET", f"/images/{image_id}/file",
+                token=session["access_token"])
+    if resp.status_code != 200:
+        return Response("Not found", status=404)
+    return Response(
+        resp.content,
+        status=200,
+        content_type=resp.headers.get("content-type", "image/jpeg"),
+    )