Phase 3: near-duplicate (dHash) rejection on contributed photos

game/ui.py

@@ -191,16 +191,18 @@ def _stump_reject_html() -> str:
     )
 
 
-def _stump_result_html(label: str, res, stored: bool) -> str:
+def _stump_result_html(label: str, res, status: str) -> str:
     mtier = "UNKNOWN" if res.abstained else res.safety
     c = TIER_COLOR.get(mtier, "#57544c")
     mcall = "refused to commit" if res.abstained else f"{_pretty(res.species)} · {mtier}"
     head = "🏆 You stumped the machine!" if res.abstained else "The machine made its call."
-    store_line = (
-        "<div class='gm-ok'>✓ Added to the open dataset — thank you. This is exactly the "
-        "data that makes the next model better.</div>" if stored else
-        "<div class='gm-warn'>Couldn't persist (dataset token not set on the Space).</div>"
-    )
+    store_line = {
+        "stored": "<div class='gm-ok'>✓ Added to the open dataset — thank you. This is exactly "
+                  "the data that makes the next model better.</div>",
+        "duplicate": "<div class='gm-warn'>Already in the dataset — this photo (or a near-match) "
+                     "was logged before, so it wasn't added again.</div>",
+        "disabled": "<div class='gm-warn'>Couldn't persist (dataset token not set on the Space).</div>",
+    }.get(status, "")
     return (
         f"<div class='gm-reveal'>"
         f"<div class='gm-truth-h'>YOUR FIND</div>"
@@ -261,8 +263,9 @@ def build_stump_tab(pipe) -> None:
             return _stump_reject_html(), gr.update()
         machine = {"species": res.species, "confidence": res.confidence,
                    "abstained": res.abstained, "safety": res.safety, "domain": res.domain}
-        stored = datastore.append_sighting(image, user_label.strip(), machine, profile.username)
-        return _stump_result_html(user_label.strip(), res, stored), _contrib_df()
+        status = datastore.append_sighting(image, user_label.strip(), machine, profile.username)
+        board = _contrib_df() if status == "stored" else gr.update()
+        return _stump_result_html(user_label.strip(), res, status), board
 
     submit.click(_submit, [up, guess, consent], [sresult, contrib])
     crefresh.click(lambda: _contrib_df(), None, [contrib])