fix(sw): refine property panel and Firefox range styles

- Property bar ends after its last field (content width, scrolls when longer)
- Remove Figma canvas layers from property tool and close SVGs
- Suppress header field hover while the field's own dropdown is open
- Gauge: Figma red fill pill, beige track, Figma thumb SVG; shared
  paint for WebKit and Gecko (::-moz-range-*) so Firefox matches Chrome
- Story buttons for gauge external value / disabled / read-only
- Browser checks: follow-up fixes, Chrome vs Firefox range, close button

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/sw/property-close-qa/after-result.json

@@ -0,0 +1,81 @@
+{
+  "label": "after",
+  "checks": [
+    {
+      "name": "size 44 x 30, top-right of the panel",
+      "status": "PASS",
+      "data": {
+        "w": 44,
+        "h": 30,
+        "right": 1,
+        "top": 1,
+        "imgs": [
+          [
+            "hm-sw-property__close-default",
+            44,
+            30
+          ],
+          [
+            "hm-sw-property__close-hover",
+            44,
+            30
+          ]
+        ]
+      }
+    },
+    {
+      "name": "Default: no canvas-light pixels on the button edge / corner",
+      "status": "PASS",
+      "data": {
+        "bright": 0,
+        "where": []
+      }
+    },
+    {
+      "name": "Hover: hover asset shown, no canvas-light pixels on the edge / corner",
+      "status": "PASS",
+      "data": {
+        "vis": [
+          "hidden",
+          "visible"
+        ],
+        "bright": 0,
+        "where": []
+      }
+    },
+    {
+      "name": "click closes the panel, focus back on 속성창 trigger",
+      "status": "PASS",
+      "data": {
+        "open": false,
+        "focusTrigger": true,
+        "log": "legacyToggle → open(true) → open(false)"
+      }
+    },
+    {
+      "name": "Escape closes the panel, focus back on 속성창 trigger",
+      "status": "PASS",
+      "data": {
+        "open": false,
+        "focusTrigger": true,
+        "log": "rue) → open(false) → legacyToggle → open(true) → open(false)"
+      }
+    },
+    {
+      "name": "no console / page errors",
+      "status": "PASS",
+      "data": []
+    }
+  ],
+  "errors": [],
+  "pixels": {
+    "def": {
+      "bright": 0,
+      "where": []
+    },
+    "hov": {
+      "bright": 0,
+      "where": []
+    }
+  }
+}

docs/sw/property-close-qa/before-result.json

@@ -0,0 +1,81 @@
+{
+  "label": "before",
+  "checks": [
+    {
+      "name": "size 44 x 30, top-right of the panel",
+      "status": "PASS",
+      "data": {
+        "w": 44,
+        "h": 30,
+        "right": 1,
+        "top": 1,
+        "imgs": [
+          [
+            "hm-sw-property__close-default",
+            44,
+            30
+          ],
+          [
+            "hm-sw-property__close-hover",
+            44,
+            30
+          ]
+        ]
+      }
+    },
+    {
+      "name": "Default: no canvas-light pixels on the button edge / corner",
+      "status": "PASS",
+      "data": {
+        "bright": 0,
+        "where": []
+      }
+    },
+    {
+      "name": "Hover: hover asset shown, no canvas-light pixels on the edge / corner",
+      "status": "PASS",
+      "data": {
+        "vis": [
+          "hidden",
+          "visible"
+        ],
+        "bright": 0,
+        "where": []
+      }
+    },
+    {
+      "name": "click closes the panel, focus back on 속성창 trigger",
+      "status": "PASS",
+      "data": {
+        "open": false,
+        "focusTrigger": true,
+        "log": "legacyToggle → open(true) → open(false)"
+      }
+    },
+    {
+      "name": "Escape closes the panel, focus back on 속성창 trigger",
+      "status": "PASS",
+      "data": {
+        "open": false,
+        "focusTrigger": true,
+        "log": "rue) → open(false) → legacyToggle → open(true) → open(false)"
+      }
+    },
+    {
+      "name": "no console / page errors",
+      "status": "PASS",
+      "data": []
+    }
+  ],
+  "errors": [],
+  "pixels": {
+    "def": {
+      "bright": 0,
+      "where": []
+    },
+    "hov": {
+      "bright": 0,
+      "where": []
+    }
+  }
+}