refactor(storybook): remove unused SW header demo stories

Remove nine SW/Header demo pages (property-fields, property-shape-slot,
composition, colorize, dynamic-controls, property-bar, additional-hover,
property-panel, layer-detail-input) and the demo code and Storybook-only
CSS used only by them. SW Stories 19 -> 10, total 338 -> 329.

The package runtime, public API, AI template and the retained Stories
(Overview, Dropdown, Property Panel 4-state comparison, Window Move
Motion and others) are unchanged. Add a current regression script and
mark the older scripts that open the retired IDs as historical evidence.

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

docs/sw/storybook-unused-story-removal-qa/verify/manager-story-order.json

@@ -0,0 +1,38 @@
+[
+  [
+    "sw-header--composed-controls",
+    "Dropdown"
+  ],
+  [
+    "sw-header--overview",
+    "Overview"
+  ],
+  [
+    "sw-header--interactive-states",
+    "Interactive States"
+  ],
+  [
+    "sw-header--window-move-motion",
+    "Window Move Motion"
+  ],
+  [
+    "sw-header--logo-slot",
+    "Logo Slot"
+  ],
+  [
+    "sw-header--document-dropdown",
+    "Document Dropdown"
+  ],
+  [
+    "sw-header--responsive-more",
+    "Responsive More"
+  ],
+  [
+    "sw-header--k-guide",
+    "K Guide"
+  ],
+  [
+    "sw-header--property-panel-compare",
+    "Property Panel · 4개 비교"
+  ]
+]

docs/sw/storybook-unused-story-removal-qa/verify/story-inventory-after.json

@@ -0,0 +1,106 @@
+{
+  "total": 329,
+  "sw": [
+    {
+      "id": "sw-header--composed-controls",
+      "name": "Dropdown",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--detail-buttons",
+      "name": "Detail Buttons (Shared States)",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest",
+        "verification"
+      ]
+    },
+    {
+      "id": "sw-header--overview",
+      "name": "Overview",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--interactive-states",
+      "name": "Interactive States",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--window-move-motion",
+      "name": "Window Move Motion",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--logo-slot",
+      "name": "Logo Slot",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--document-dropdown",
+      "name": "Document Dropdown",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--responsive-more",
+      "name": "Responsive More",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--k-guide",
+      "name": "K Guide",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    },
+    {
+      "id": "sw-header--property-panel-compare",
+      "name": "Property Panel · 4개 비교",
+      "title": "SW/Header",
+      "tags": [
+        "dev",
+        "test",
+        "manifest"
+      ]
+    }
+  ]
+}