heuristic backup for when learned model crashes during patch fill

PBC3.py

@@ -645,6 +645,9 @@ class PBC3:
             current_channel = cls._choose_channel(scores, step, channels, config.channel_cycle)
             boxes = None if filler.learned is not None else search.propose(target, canvas, config, rng, step, current_channel, timings)
             patch, values = filler.select(target, canvas, config, rng, channel_bits, step, current_channel, boxes, len(patches), debug_lines, timings)
+            if patch is None and filler.learned is not None:
+                boxes = search.propose(target, canvas, config, rng, step, current_channel, timings)
+                patch, values = filler.select_heuristic(target, canvas, config, channel_bits, step, boxes, len(patches), debug_lines, timings)
             if patch is None:
                 break
             t = time.perf_counter(); c = patch["channel"]

static/app.js

@@ -453,6 +453,10 @@ document.querySelectorAll("#param-mode .seg-btn").forEach(b => b.addEventListene
   document.querySelectorAll("#param-mode .seg-btn").forEach(x => x.classList.remove("active"));
   b.classList.add("active");
   paramMode = b.dataset.mode;
+  if (paramMode === "Auto") {
+    const preset = (paramState.preset && paramState.preset !== "custom") ? paramState.preset : "quality";
+    applyPreset(preset);
+  }
   renderParams();
 }));
 

static/index.html

@@ -248,7 +248,7 @@
 <div id="toast" class="toast"></div>
 
 <script src="https://cdn.plot.ly/plotly-2.35.2.min.js" charset="utf-8"></script>
-<script src="/app.js?v=20260624f"></script>
+<script src="/app.js?v=20260625a"></script>
 <script src="/viewer_magnifier.js?v=20260622b"></script>
 <script src="/sweep.js?v=20260622b"></script>
 <script src="/benchmark.js?v=20260624e"></script>