Add preset seed thumbnails; remove footnote blockquote

app.py

@@ -50,7 +50,7 @@ from omegaconf import OmegaConf
 from huggingface_hub import snapshot_download
 
 from fastapi import UploadFile, File, WebSocket, WebSocketDisconnect
-from fastapi.responses import HTMLResponse, JSONResponse
+from fastapi.responses import HTMLResponse, JSONResponse, FileResponse
 from gradio import Server
 from gradio.context import LocalContext
 
@@ -62,6 +62,16 @@ if str(APP_DIR) not in sys.path:
 MODEL_ID = "acvlab/ABot-World-0-5B-LF"
 CKPT_DIR = APP_DIR / "checkpoints" / "ABot-World-0-5B-LF"
 
+# Preset starting-world images bundled with the Space (sourced from the ABot-World
+# repo). Shown in the UI as clickable thumbnails that seed the i2v rollout directly.
+EXAMPLES_DIR = APP_DIR / "examples"
+EXAMPLE_SEEDS = [
+    {"name": "desert_valley.png", "label": "Desert valley"},
+    {"name": "forest_stream.png", "label": "Forest stream"},
+    {"name": "mountain_meadow.png", "label": "Mountain meadow"},
+    {"name": "example.png", "label": "Sample scene"},
+]
+
 # ── Stream / rollout configuration ───────────────────────────────────────────
 # 704x1280 is the native training resolution used by the upstream web client.
 STREAM_HEIGHT = 704
@@ -583,6 +593,50 @@ async def upload_seed(file: UploadFile = File(...)):
     return {"seed_path": tmp.name}
 
 
+def _safe_example_path(name: str) -> Optional[Path]:
+    """Resolve `name` to a bundled example image, guarding against traversal."""
+    if not any(name == e["name"] for e in EXAMPLE_SEEDS):
+        return None
+    path = (EXAMPLES_DIR / name).resolve()
+    if EXAMPLES_DIR.resolve() not in path.parents or not path.is_file():
+        return None
+    return path
+
+
+@app.get("/example_seeds")
+async def example_seeds():
+    """List the preset starting-world images available as clickable thumbnails."""
+    return {"examples": [e for e in EXAMPLE_SEEDS if (EXAMPLES_DIR / e["name"]).is_file()]}
+
+
+@app.get("/example_thumb")
+async def example_thumb(name: str = ""):
+    """Serve a preset starting-world image (for thumbnail display in the UI)."""
+    path = _safe_example_path(name)
+    if path is None:
+        return JSONResponse({"error": "unknown example"}, status_code=404)
+    return FileResponse(str(path), media_type="image/png")
+
+
+@app.get("/example_seed")
+async def example_seed(name: str = ""):
+    """Seed the i2v rollout from a bundled preset image (no upload required).
+
+    Copies the chosen example into a server-side temp file and returns its path,
+    mirroring /upload_seed so the browser can pass it to /start_game as seed_path.
+    """
+    path = _safe_example_path(name)
+    if path is None:
+        return JSONResponse({"error": "unknown example"}, status_code=404)
+    try:
+        img = Image.open(path).convert("RGB")
+    except Exception:
+        return JSONResponse({"error": "could not read example image"}, status_code=500)
+    tmp = tempfile.NamedTemporaryFile(prefix="abot_seed_", suffix=".png", delete=False)
+    img.save(tmp.name, format="PNG")
+    return {"seed_path": tmp.name}
+
+
 @app.get("/", response_class=HTMLResponse)
 async def homepage():
     html_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "index.html")