test: verify responsive workbench layout (#9)

validation/issue-9-result.json

@@ -0,0 +1,75 @@
+{
+  "status": "passed",
+  "viewports": [
+    {
+      "width": 1920,
+      "height": 1080,
+      "status": "passed"
+    },
+    {
+      "width": 1366,
+      "height": 768,
+      "status": "passed"
+    },
+    {
+      "width": 390,
+      "height": 844,
+      "status": "passed"
+    }
+  ],
+  "existing_facility_panel_validation": {
+    "status": "passed",
+    "facilities_checked": 1662,
+    "search_click_samples": [
+      "MH3",
+      "UHR1-0058",
+      "UHR1-02901",
+      "OUT_PUMP",
+      "UHR1-01411",
+      "C_OUT_PUMP"
+    ],
+    "checks": [
+      "all facility information panels",
+      "summary counts",
+      "real search/selection clicks",
+      "missing-facility explanations",
+      "unknown ID",
+      "scale reset",
+      "plan view",
+      "layer toggles",
+      "audit dialog",
+      "reset",
+      "no page errors"
+    ],
+    "browser": "156.0.4314.42",
+    "limitations": [
+      "Information consistency; screenshot review is separate from dimensional geometry verification."
+    ]
+  },
+  "audit_highlight_validation": {
+    "status": "passed",
+    "target_conduits": 207,
+    "red_pixels_on": 4127,
+    "red_pixels_off": 0,
+    "original_colors_restored": true,
+    "checks": [
+      "target IDs",
+      "red pixels",
+      "1 second phases",
+      "exact original pixel restoration",
+      "timer cancellation",
+      "steady mode",
+      "layer visibility",
+      "selection reasons",
+      "3 unplaced facilities",
+      "reset",
+      "reduced motion",
+      "no page errors"
+    ]
+  },
+  "visual_review": [
+    "ui9-1366.png",
+    "ui9-390.png",
+    "ui9-mobile-details.png"
+  ]
+}