feat(sw): integrated improvement 0.2.0 (popup content, header open, tool buttons)

SW package 0.2.0 integrated improvement (Task A, steps 1-8). All new props are
optional; existing SW Stories are pixel-identical to the previous build (28/28).

- Build reproducibility: dist text normalized to LF, dist/build-info.json
  (commit, dirty, tool versions, no timestamp), packages/sw/.gitattributes
  (eol=lf). LF checkouts give identical dist and tarball.
- SWHeader: documentOpenPlacement ("menu" default | "header": Open right of
  the logo in the existing document-button look, reusing onDocumentOpen and
  documentOpenLabel, no duplicate Open in the dropdown), leading slot,
  hiddenControls sub-items documentNew / documentOpen / layerFreeze /
  layerLock. Open moves into More on measured overflow (with hysteresis).
- showNew / showOpen (SWHeaderDocumentTitle), showFreeze / showLock (layer
  menu, field, property window list).
- SWToolButton (text / pill / document) and SWToolGroup (radio selection),
  reusing the existing toggle, pill and file-name looks.
- SWPopup / SWPopupSection / SWPopupRow on the shared property window frame;
  SWHeaderPropertyPanel gains children, title, autoFocus and optional
  selection / properties / groups. Escape stack for several popups.
- Field dropdowns inside a popup use the shared fixed overlay
  (useSWFixedDropdownPosition), so the scrolling body no longer clips them.
- AI guide, examples E/F, README, Storybook (SW/Header/Options, SW/Tool,
  SW/Popup) and verification record docs/sw/sw-integrated-improvement-2026-10-19.md.
- Regression scripts rescoped for the intended changes (unused-removal 81/81,
  overview 52/54 with the two pre-existing historical assertions).

Known limitation (unresolved): tools / leading content (incl. SWToolGroup)
does not move into More. With a wide tool bar the configured fields shrink
instead; in Example F the document name and layer field reach 0px at 390px.

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

packages/sw/ai/examples/ExampleE-CustomPopup.tsx

@@ -0,0 +1,40 @@
+// Example E — the SW popup frame with project content (no Header). SWPopup keeps the property window design;
+// children are free: SWPopupSection / SWPopupRow rows with SWHeaderInput, and an existing SW dropdown.
+import { useId, useState } from "react"
+import { SWHeaderLayerMenu, SWHeaderInput, SWPopup, SWPopupRow, SWPopupSection, SWTheme } from "@hm-design/sw"
+import { layers } from "./sample-data"
+
+export function ExampleECustomPopup({ onEvent }: { onEvent?: (name: string) => void }) {
+  const [open, setOpen] = useState(true)
+  const nameId = useId()
+  const [name, setName] = useState("평면도-01")
+  const [scale, setScale] = useState("100")
+  const [x, setX] = useState("1200.5")
+  const [activeLayerId, setActiveLayerId] = useState("0")
+  if (!open) return <button type="button" onClick={() => setOpen(true)}>설정 열기</button>
+  return (
+    <SWTheme>
+      <SWPopup title="도면 설정" onClose={() => { setOpen(false); onEvent?.("popup:close") }}>
+        <SWPopupSection title="도면">
+          <SWPopupRow label="이름" htmlFor={nameId}>
+            <SWHeaderInput id={nameId} value={name} onCommit={next => { setName(next); onEvent?.(`name:${next}`) }} />
+          </SWPopupRow>
+          <SWPopupRow label="축척" unit="%" numeric>
+            <SWHeaderInput aria-label="축척" valueType="number" value={scale} onCommit={next => { setScale(next); onEvent?.(`scale:${next}`) }} />
+          </SWPopupRow>
+        </SWPopupSection>
+        <SWPopupSection title="객체 정보">
+          <SWPopupRow label="타입" readOnly><SWHeaderInput aria-label="타입" value="Line" readOnly /></SWPopupRow>
+          <SWPopupRow label="X" unit="mm" numeric>
+            <SWHeaderInput aria-label="X" valueType="number" value={x} onCommit={next => { setX(next); onEvent?.(`x:${next}`) }} />
+          </SWPopupRow>
+        </SWPopupSection>
+        <SWPopupSection title="레이어">
+          {/* Inside a popup the dropdown opens as a fixed overlay, so the scrolling body never clips it. */}
+          <SWHeaderLayerMenu value={{ name: "0" }} layers={layers} activeLayerId={activeLayerId}
+            onLayerSelect={layer => { setActiveLayerId(layer.id); onEvent?.(`layer:${layer.id}`) }} />
+        </SWPopupSection>
+      </SWPopup>
+    </SWTheme>
+  )
+}