front page + decoder fixes, png encoding optimizations + avif plugin dropped (its worse than the default avif of PIL)

requirements_docker.txt

@@ -2,10 +2,9 @@ fastapi
 uvicorn[standard]
 python-multipart
 numpy
-Pillow
+Pillow>=11.3
 pandas
 numba
 matplotlib
 opencv-python-headless
-optuna
-pillow-avif-plugin
+optuna

server.py

@@ -163,9 +163,9 @@ def generate_multlist(bit_count, min_val, max_val, mode="Stable_Uniform"):
 DEMO_MULT_LIST = generate_multlist(7, -255, 255, "Stable_Uniform")
 
 
-def _png_b64(img: Image.Image) -> str:
+def _png_b64(img: Image.Image, compress_level: int = 6) -> str:
     buf = io.BytesIO()
-    img.save(buf, format="PNG")
+    img.save(buf, format="PNG", compress_level=compress_level)
     return "data:image/png;base64," + base64.b64encode(buf.getvalue()).decode()
 
 
@@ -296,8 +296,8 @@ async def stream_compress(image: UploadFile = File(...), downsample_initialize:
     img = Image.open(io.BytesIO(raw)).convert("RGB")
 
     def gen():
-        for ev in PBC.compress_stream(img, auto_downsample_init=_truthy(downsample_initialize),
-                                      patch_count=600, frame_every=25):
+        for ev in PBC3.compress_stream(img, auto_downsample_init=_truthy(downsample_initialize),
+                                       patch_count=600, frame_every=25):
             if ev["event"] == "frame":
                 yield json.dumps({"image": _png_b64(ev["image"])}) + "\n"
 
@@ -309,8 +309,8 @@ async def decode(file: UploadFile = File(...)):
     raw = await file.read()
 
     try:
-        dec_res = PBC3.decompress(bytes(raw)).image.convert("RGB")
-        img = dec_res.image
+        dec_res = PBC3.decompress(bytes(raw))
+        img = dec_res.image.convert("RGB")
         elapsed = dec_res.encode_seconds
     except Exception as exc:
         return JSONResponse({"error": f"Decode failed: {exc}"}, status_code=400)