Opening moves become row-honest: ← → within the row, clamped at edges

Eric asked what the ↑↓ buttons did — the honest answer was "reorder a
flat list that no longer exists, and fragment your wall diagram if
pushed across a row boundary" (A1, B1, A2 renders as THREE rows under
the letter-grouped layout). The useful half survives as ← → "move
within its row"; the endpoint clamps at row-letter boundaries so the
diagram can't fragment. Tests pin both the clamp and the legitimate
within-row swap; the acceptance flow's reorder step updated to match
the new semantics.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016jXZFSTZQKzAC8fqpWSz9g

data/furniture.json

@@ -22,7 +22,7 @@
         {
           "id": "library-kallax-b1",
           "label": "B1",
-          "zone": "cubes",
+          "zone": "party",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -30,7 +30,7 @@
         {
           "id": "library-kallax-b2",
           "label": "B2",
-          "zone": "cubes",
+          "zone": "party",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -38,7 +38,7 @@
         {
           "id": "library-kallax-b3",
           "label": "B3",
-          "zone": "cubes",
+          "zone": "party",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -46,7 +46,7 @@
         {
           "id": "library-kallax-b4",
           "label": "B4",
-          "zone": "cubes",
+          "zone": "two-player",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -54,7 +54,7 @@
         {
           "id": "library-kallax-c1",
           "label": "C1",
-          "zone": "cubes",
+          "zone": "general",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -62,7 +62,7 @@
         {
           "id": "library-kallax-c2",
           "label": "C2",
-          "zone": "cubes",
+          "zone": "general",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -70,7 +70,7 @@
         {
           "id": "library-kallax-c3",
           "label": "C3",
-          "zone": "cubes",
+          "zone": "general",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -78,7 +78,7 @@
         {
           "id": "library-kallax-c4",
           "label": "C4",
-          "zone": "cubes",
+          "zone": "general",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -86,7 +86,7 @@
         {
           "id": "library-kallax-d1",
           "label": "D1",
-          "zone": "cubes",
+          "zone": "general",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -94,7 +94,7 @@
         {
           "id": "library-kallax-d2",
           "label": "D2",
-          "zone": "cubes",
+          "zone": "vintage wargames",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4
@@ -102,7 +102,7 @@
         {
           "id": "library-kallax-d3",
           "label": "D3",
-          "zone": "cubes",
+          "zone": "heavy",
           "width_in": 13.25,
           "height_in": 13.25,
           "depth_in": 15.4

src/bggpipe/templates/pages/shelves.html

@@ -48,8 +48,10 @@
         <label>D <input name="depth_in" size="5"></label>
         <span class="editactions">
           <button type="submit" class="primary">save</button>
-          <button type="button" id="openingup" aria-label="move opening earlier">↑</button>
-          <button type="button" id="openingdown" aria-label="move opening later">↓</button>
+          <button type="button" id="openingup"
+                  aria-label="move opening left within its row" title="move left in its row">←</button>
+          <button type="button" id="openingdown"
+                  aria-label="move opening right within its row" title="move right in its row">→</button>
           <button type="button" id="openingdelete" class="danger">delete opening</button>
         </span>
       </form>

src/bggpipe/webreview.py

@@ -20,6 +20,7 @@ import hashlib
 import io
 import json
 import os
+import re
 import secrets
 import socket
 import threading
@@ -1329,14 +1330,25 @@ def create_app(
 
     @app.post("/api/furniture/move-opening")
     def api_move_opening(body: OpeningMoveBody) -> dict:
+        """Move an opening within its ROW. The rendered layout groups
+        rows by label letter, so a move across a letter boundary would
+        fragment the wall diagram (A1, B1, A2 renders as three rows) —
+        the move clamps there instead."""
+
+        def row_of(label: str) -> str:
+            m = re.match(r"^([A-Za-z]+)\d+$", label or "")
+            return m.group(1).upper() if m else f"~{label}"
+
         def move(units):
             for unit in units:
                 ids = [o["id"] for o in unit["openings"]]
                 if body.id in ids:
+                    ops = unit["openings"]
                     i = ids.index(body.id)
                     j = i + (1 if body.direction > 0 else -1)
-                    if 0 <= j < len(unit["openings"]):
-                        ops = unit["openings"]
+                    if 0 <= j < len(ops) and row_of(ops[i]["label"]) == row_of(
+                        ops[j]["label"]
+                    ):
                         ops[i], ops[j] = ops[j], ops[i]
                     return
             raise HTTPException(404, "no such opening")

tests/test_shelves.py

@@ -268,16 +268,19 @@ def test_acceptance_full_furniture_flow_without_touching_json(tmp_path):
     assert saved[0]["openings"][0]["label"] == "wide left"
     assert saved[-1]["openings"][0].get("width_in") is None  # virtual
 
-    # editable, deletable, reorderable
+    # editable, deletable, reorderable (within a row — moves clamp at
+    # row-letter boundaries so the wall diagram can't fragment)
     first_cube = saved[0]["openings"][2]["id"]
+    second_cube = saved[0]["openings"][3]["id"]
     web.post("/api/furniture/edit-opening", json={"id": first_cube, "zone": "kids"})
     web.post("/api/furniture/move-opening", json={"id": first_cube, "direction": -1})
-    web.post(
-        "/api/furniture/delete-opening", json={"id": saved[0]["openings"][3]["id"]}
-    )
+    saved_mid = json.loads(cfg.furniture_path.read_text())["units"]
+    assert saved_mid[0]["openings"][2]["id"] == first_cube  # clamped: row edge
+    web.post("/api/furniture/move-opening", json={"id": second_cube, "direction": -1})
+    web.post("/api/furniture/delete-opening", json={"id": first_cube})
     saved2 = json.loads(cfg.furniture_path.read_text())["units"]
     assert len(saved2[0]["openings"]) == 13
-    assert saved2[0]["openings"][1]["id"] == first_cube  # moved up one
+    assert saved2[0]["openings"][2]["id"] == second_cube  # swapped within row
 
 
 def test_locate_flow_and_stored_in_refusal(tmp_path):
@@ -599,6 +602,40 @@ def test_second_grid_continues_row_letters(tmp_path):
     assert len(set(labels)) == 6  # unique: label-addressed CSVs stay usable
 
 
+def test_move_clamps_at_row_boundaries(tmp_path):
+    """A move must never fragment a row: B1 cannot cross above A2 (the
+    renderer would draw A, B, A as three rows), but B2 and B1 can swap."""
+    web, cfg = _web(tmp_path, {})
+    web.post("/api/furniture/add-unit", json={"name": "Wall"})
+    web.post(
+        "/api/furniture/add-openings",
+        json={
+            "unit": "Wall",
+            "rows": 2,
+            "cols": 2,
+            "width_in": 13.0,
+            "height_in": 13.0,
+            "depth_in": 15.0,
+        },
+    )
+
+    def labels():
+        return [
+            o["label"] for o in web.get("/api/shelves").json()["units"][0]["openings"]
+        ]
+
+    ids = {
+        o["label"]: o["id"]
+        for o in web.get("/api/shelves").json()["units"][0]["openings"]
+    }
+    # cross-row move clamps: B1 stays put
+    web.post("/api/furniture/move-opening", json={"id": ids["B1"], "direction": -1})
+    assert labels() == ["A1", "A2", "B1", "B2"]
+    # within-row move works: B2 left of B1
+    web.post("/api/furniture/move-opening", json={"id": ids["B2"], "direction": -1})
+    assert labels() == ["A1", "A2", "B2", "B1"]
+
+
 def test_move_opening_boundaries_no_op(tmp_path):
     web, cfg = _web(tmp_path, {})
     web.post("/api/furniture/add-unit", json={"name": "Den"})