fix: preserve manual dock-edge resize width across zoom/pan (save dockEdgeSize in placement)

src/main.ts

@@ -57,7 +57,7 @@ export default function () {
   // re-persist it (otherwise it would overwrite the maximized flag with undefined).
   let maximizedState = false
   type Placement =
-    | { mode: 'dock'; position: DockPosition }
+    | { mode: 'dock'; position: DockPosition; dockEdgeSize: number }
     | { mode: 'free'; x: number; y: number; w: number; h: number; maximized?: boolean }
   let saveTimer: ReturnType<typeof setTimeout> | null = null
   function savePlacement (p: Placement) {
@@ -321,7 +321,14 @@ export default function () {
     }
     if (dockedPosition !== null) {
       applyDock(dockedPosition, width, height, false)
-      savePlacement({ mode: 'dock', position: dockedPosition })
+      // Remember the manually-resized size so the dock-edge canonical formula
+      // (used by the poller on zoom/pan) picks it up instead of the default 320.
+      if (dockedPosition === 'center-left' || dockedPosition === 'center-right') {
+        dockEdgeSize = width
+      } else if (dockedPosition === 'top-center' || dockedPosition === 'bottom-center') {
+        dockEdgeSize = height
+      }
+      savePlacement({ mode: 'dock', position: dockedPosition, dockEdgeSize })
     } else {
       // Free (or center one-shot): manual resize clears the maximized flag.
       maximizedState = false
@@ -383,7 +390,7 @@ export default function () {
                    position === 'center-left' || position === 'center-right'
     if (isEdge) {
       // Edges are held docked — persist as dock so re-open re-pins to the edge.
-      savePlacement({ mode: 'dock', position: position })
+      savePlacement({ mode: 'dock', position: position, dockEdgeSize })
     } else {
       // Corners / center are one-shot — remember the EXACT size+position (free).
       saveFreeFromCurrent()
@@ -629,7 +636,9 @@ export default function () {
           // Edge dock: stretch to its canonical size and pin (held across zoom/pan).
           dockedPosition = saved.position
           maximizedState = false
-          const state = computeDock(saved.position, 320, 200, true)
+          const savedEdge = saved.dockEdgeSize || DEFAULT_DOCK_EDGE
+          dockEdgeSize = savedEdge
+          const state = computeDock(saved.position, savedEdge, savedEdge, true)
           figma.ui.resize(Math.max(1, state.width), Math.max(1, state.height))
           lastSize = { width: clampWindowSize(state).width, height: clampWindowSize(state).height }
           setTimeout(function () {