diff --git a/src/main/index.ts b/src/main/index.ts
index bb88b3e..3d4a083 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -25,6 +25,11 @@ import { RESIZE_DIRECTIONS, type ResizeDirection } from '../types/windowResize'
 import type { DialogOptions, DialogResult } from '../types/dialog'
 import { normalizeProfile } from '../shared/profileState'
 import { resolveNativeThemeSource } from '../shared/themeState'
+import {
+  clampDraggedMainWindowBounds,
+  raiseWindowAboveNormalPopouts,
+  resolveExpandedMainWindowBounds,
+} from '../shared/windowGeometry'
 import { calculateResizedWindowBounds } from '../shared/windowResize'
 import { FileBackedProfileLibrary } from './profileLibrary'
 import { AstraIntegrationService } from './services/astraIntegration'
@@ -34,7 +39,7 @@ import { FileBackedWindowStateStore } from './windowStateStore'
 let mainWindow: BrowserWindow | null = null
 let moveInterval: ReturnType<typeof setInterval> | null = null
 let moveStartCursor: { x: number; y: number } | null = null
-let moveStartPosition: number[] | null = null
+let moveStartBounds: WindowBounds | null = null
 let resizeInterval: ReturnType<typeof setInterval> | null = null
 let resizeWindow: BrowserWindow | null = null
 let resizeStartCursor: { x: number; y: number } | null = null
@@ -44,7 +49,8 @@ let mainWindowBoundsTimer: ReturnType<typeof setTimeout> | null = null
 let mainRendererReady = false
 let allowMainWindowClose = false
 let mainWindowClosePending = false
-let suppressNextMainWindowBoundsEvent = false
+let suppressMainWindowSyncUntil = 0
+let mainWindowLogicalBounds: WindowBounds | null = null
 
 const scopePopoutWindows = new Map<ScopeKind, BrowserWindow>()
 const scopePopoutCloseAllowed = new Set<ScopeKind>()
@@ -74,6 +80,9 @@ const POPOUT_DEFAULTS = {
   minHeight: 160,
 }
 
+const MAIN_WINDOW_SYNC_SUPPRESSION_MS = 180
+const MAIN_WINDOW_VISIBLE_GRAB_MARGIN = 64
+
 function getProfileLibrary(): FileBackedProfileLibrary {
   if (!profileLibrary) {
     profileLibrary = new FileBackedProfileLibrary(
@@ -176,6 +185,7 @@ function focusMainWindow(): void {
   }
   mainWindow.show()
   mainWindow.focus()
+  raiseMainWindowAboveNormalPopouts()
 }
 
 function getErrorMessage(error: unknown, fallback: string): string {
@@ -244,8 +254,7 @@ function scheduleMainWindowBoundsSave(window: BrowserWindow): void {
   mainWindowBoundsTimer = setTimeout(() => {
     mainWindowBoundsTimer = null
     if (window.isDestroyed() || window.webContents.isDestroyed()) return
-    if (suppressNextMainWindowBoundsEvent) {
-      suppressNextMainWindowBoundsEvent = false
+    if (isMainWindowSyncSuppressed()) {
       return
     }
     window.webContents.send('window:bounds-changed', toLogicalBounds(window))
@@ -293,6 +302,32 @@ function getBaseMinHeight(window: BrowserWindow): number {
   return isMainRendererWindow(window) ? WINDOW_DEFAULTS.minHeight : POPOUT_DEFAULTS.minHeight
 }
 
+function normalizeMainWindowBounds(bounds: WindowBounds): WindowBounds {
+  return {
+    x: Math.round(bounds.x),
+    y: Math.round(bounds.y),
+    width: Math.max(WINDOW_DEFAULTS.minWidth, Math.round(bounds.width)),
+    height: Math.max(WINDOW_DEFAULTS.minHeight, Math.round(bounds.height)),
+  }
+}
+
+function getDisplayWorkAreas(): WindowBounds[] {
+  return screen.getAllDisplays().map((display) => ({
+    x: display.workArea.x,
+    y: display.workArea.y,
+    width: display.workArea.width,
+    height: display.workArea.height,
+  }))
+}
+
+function suppressMainWindowSync(durationMs = MAIN_WINDOW_SYNC_SUPPRESSION_MS): void {
+  suppressMainWindowSyncUntil = Math.max(suppressMainWindowSyncUntil, Date.now() + durationMs)
+}
+
+function isMainWindowSyncSuppressed(): boolean {
+  return suppressMainWindowSyncUntil > Date.now()
+}
+
 function getSettingsHeight(window: BrowserWindow | null): number {
   if (!window) return 0
   return windowSettingsHeights.get(window.id) ?? 0
@@ -310,13 +345,42 @@ function setSettingsHeightForWindow(window: BrowserWindow, height: number): void
 }
 
 function toLogicalBounds(window: BrowserWindow, bounds = window.getBounds()): WindowBounds {
+  if (isMainRendererWindow(window) && mainWindowLogicalBounds) {
+    return { ...mainWindowLogicalBounds }
+  }
+
   return {
     ...bounds,
     height: Math.max(getBaseMinHeight(window), bounds.height - getSettingsHeight(window)),
   }
 }
 
+function syncMainWindowLogicalBounds(window: BrowserWindow, bounds = window.getBounds()): void {
+  if (!isMainRendererWindow(window)) {
+    return
+  }
+
+  mainWindowLogicalBounds = normalizeMainWindowBounds({
+    x: bounds.x,
+    y: bounds.y,
+    width: bounds.width,
+    height: Math.max(WINDOW_DEFAULTS.minHeight, bounds.height - getSettingsHeight(window)),
+  })
+}
+
+function applyMainWindowLogicalBounds(window: BrowserWindow, bounds: WindowBounds): void {
+  const logicalBounds = normalizeMainWindowBounds(bounds)
+  mainWindowLogicalBounds = logicalBounds
+  suppressMainWindowSync()
+  window.setBounds(resolveExpandedMainWindowBounds(logicalBounds, getSettingsHeight(window), getDisplayWorkAreas()))
+}
+
 function applyLogicalBounds(window: BrowserWindow, bounds: WindowBounds): void {
+  if (isMainRendererWindow(window)) {
+    applyMainWindowLogicalBounds(window, bounds)
+    return
+  }
+
   window.setBounds({
     ...bounds,
     height: bounds.height + getSettingsHeight(window),
@@ -335,12 +399,28 @@ function setWindowHeight(window: BrowserWindow, bounds: WindowBounds, height: nu
 function applySettingsHeight(window: BrowserWindow, rawNextHeight: number): void {
   const currentSettingsHeight = getSettingsHeight(window)
   const nextSettingsHeight = Math.max(0, Math.round(rawNextHeight))
-  const delta = nextSettingsHeight - currentSettingsHeight
   const baseMinHeight = getBaseMinHeight(window)
   const [minW] = window.getMinimumSize()
 
   window.setMinimumSize(minW, baseMinHeight + nextSettingsHeight)
 
+  if (currentSettingsHeight === nextSettingsHeight) {
+    return
+  }
+
+  if (isMainRendererWindow(window)) {
+    if (!mainWindowLogicalBounds) {
+      syncMainWindowLogicalBounds(window)
+    }
+    setSettingsHeightForWindow(window, nextSettingsHeight)
+    applyMainWindowLogicalBounds(window, toLogicalBounds(window))
+    if (currentSettingsHeight === 0 && nextSettingsHeight > 0) {
+      raiseMainWindowAboveNormalPopouts()
+    }
+    return
+  }
+
+  const delta = nextSettingsHeight - currentSettingsHeight
   if (delta !== 0) {
     const bounds = window.getBounds()
     const newHeight = Math.max(baseMinHeight + nextSettingsHeight, bounds.height + delta)
@@ -382,6 +462,10 @@ function applySettingsHeight(window: BrowserWindow, rawNextHeight: number): void
   setSettingsHeightForWindow(window, nextSettingsHeight)
 }
 
+function raiseMainWindowAboveNormalPopouts(): void {
+  raiseWindowAboveNormalPopouts(mainWindow, scopePopoutWindows.values())
+}
+
 function sendToRenderer(sender: WebContents, channel: string, ...args: unknown[]): void {
   if (!sender.isDestroyed()) {
     sender.send(channel, ...args)
@@ -398,7 +482,7 @@ function stopWindowMoveController(): void {
     moveInterval = null
   }
   moveStartCursor = null
-  moveStartPosition = null
+  moveStartBounds = null
 }
 
 function stopWindowResizeController(): void {
@@ -651,6 +735,7 @@ function createMainWindow(): void {
       backgroundThrottling: false,
     },
   })
+  syncMainWindowLogicalBounds(mainWindow)
 
   mainWindow.on('close', (event) => {
     if (allowMainWindowClose || !mainRendererReady || mainWindow?.webContents.isDestroyed()) {
@@ -681,6 +766,8 @@ function createMainWindow(): void {
       windowSettingsHeights.delete(mainWindow.id)
       windowSettingsBottomAnchors.delete(mainWindow.id)
     }
+    mainWindowLogicalBounds = null
+    suppressMainWindowSyncUntil = 0
     mainRendererReady = false
     allowMainWindowClose = false
     mainWindowClosePending = false
@@ -693,12 +780,21 @@ function createMainWindow(): void {
 
   mainWindow.on('move', () => {
     if (!mainWindow) return
+    if (!isMainWindowSyncSuppressed()) {
+      syncMainWindowLogicalBounds(mainWindow)
+    }
     scheduleMainWindowBoundsSave(mainWindow)
   })
   mainWindow.on('resize', () => {
     if (!mainWindow) return
+    if (!isMainWindowSyncSuppressed()) {
+      syncMainWindowLogicalBounds(mainWindow)
+    }
     scheduleMainWindowBoundsSave(mainWindow)
   })
+  mainWindow.on('focus', () => {
+    raiseMainWindowAboveNormalPopouts()
+  })
 
   loadRendererTarget(mainWindow, { window: 'main' })
 }
@@ -799,6 +895,7 @@ function createScopePopoutWindow(kind: ScopeKind, rawBounds?: WindowBounds): Bro
   popoutWindow.once('ready-to-show', () => {
     if (!popoutWindow.isDestroyed()) {
       popoutWindow.show()
+      raiseMainWindowAboveNormalPopouts()
     }
   })
 
@@ -924,14 +1021,26 @@ function setupIPC(): void {
     stopWindowMoveController()
     const cursor = screen.getCursorScreenPoint()
     moveStartCursor = { x: cursor.x, y: cursor.y }
-    moveStartPosition = targetWindow.getPosition()
+    moveStartBounds = targetWindow.getBounds()
 
     moveInterval = setInterval(() => {
-      if (!targetWindow || targetWindow.isDestroyed() || !moveStartCursor || !moveStartPosition) return
+      if (!targetWindow || targetWindow.isDestroyed() || !moveStartCursor || !moveStartBounds) return
       const current = screen.getCursorScreenPoint()
       const dx = current.x - moveStartCursor.x
       const dy = current.y - moveStartCursor.y
-      targetWindow.setPosition(moveStartPosition[0] + dx, moveStartPosition[1] + dy)
+
+      if (isMainRendererWindow(targetWindow)) {
+        const nextBounds = clampDraggedMainWindowBounds({
+          x: moveStartBounds.x + dx,
+          y: moveStartBounds.y + dy,
+          width: moveStartBounds.width,
+          height: moveStartBounds.height,
+        }, getDisplayWorkAreas(), MAIN_WINDOW_VISIBLE_GRAB_MARGIN)
+        targetWindow.setPosition(nextBounds.x, nextBounds.y)
+        return
+      }
+
+      targetWindow.setPosition(moveStartBounds.x + dx, moveStartBounds.y + dy)
     }, 16)
   })
 
@@ -1212,9 +1321,6 @@ function setupIPC(): void {
     const targetWindow = getWindowFromSender(event.sender)
     if (!targetWindow) return
 
-    if (isMainRendererWindow(targetWindow)) {
-      suppressNextMainWindowBoundsEvent = true
-    }
     applyLogicalBounds(targetWindow, bounds)
   })
 
@@ -1231,6 +1337,20 @@ function setupIPC(): void {
 
     const display = screen.getDisplayMatching(targetWindow.getBounds())
     const workArea = display.workArea
+
+    if (isMainRendererWindow(targetWindow)) {
+      const logicalBounds = toLogicalBounds(targetWindow)
+      applyLogicalBounds(targetWindow, {
+        x: workArea.x,
+        y: position === 'top'
+          ? workArea.y
+          : workArea.y + workArea.height - logicalBounds.height,
+        width: workArea.width,
+        height: logicalBounds.height,
+      })
+      return
+    }
+
     const [, height] = targetWindow.getSize()
 
     if (position === 'top') {
diff --git a/src/renderer/App.tsx b/src/renderer/App.tsx
index 8dd1a5e..a93764b 100644
--- a/src/renderer/App.tsx
+++ b/src/renderer/App.tsx
@@ -6,14 +6,13 @@ import BottomBar from './components/BottomBar'
 import ScopePopoutBridge from './components/ScopePopoutBridge'
 import WindowResizeOverlay from './components/WindowResizeOverlay'
 import AppBanner from './components/AppBanner'
+import { resolveMainWindowSettingsHeight } from './mainWindowSettings'
 import { useSettingsStore } from './stores/settingsStore'
 import { useAstraStore } from './stores/astraStore'
 import { useAudioStore } from './stores/audioStore'
 import { useThemeStore } from './stores/themeStore'
 import { useUiStore } from './stores/uiStore'
 
-const DEFAULT_SETTINGS_HEIGHT = 400
-
 export default function App(): JSX.Element {
   const [toolbarVisible, setToolbarVisible] = useState(false)
   const [settingsPanelHeight, setSettingsPanelHeight] = useState(0)
@@ -136,11 +135,12 @@ export default function App(): JSX.Element {
     updateMainWindowBounds,
   ])
 
-  const measuredSettingsHeight = settingsPanelHeight > 0 && bottomBarHeight > 0
-    ? settingsPanelHeight + bottomBarHeight
-    : DEFAULT_SETTINGS_HEIGHT
-
-  const settingsHeight = settingsOpen ? measuredSettingsHeight : 0
+  const settingsHeight = resolveMainWindowSettingsHeight(
+    settingsOpen,
+    settingsPanelHeight,
+    bottomBarHeight,
+  )
+  const settingsVisible = settingsOpen && settingsHeight > 0
 
   useLayoutEffect(() => {
     window.electronAPI.setSettingsHeight(settingsHeight)
@@ -211,12 +211,14 @@ export default function App(): JSX.Element {
 
       <AppBanner />
 
-      {settingsOpen && (
-        <div className="prism-settings-region" style={{ height: settingsHeight }}>
-          <SettingsPanel onHeightChange={setSettingsPanelHeight} />
-          <BottomBar onClose={handleCloseSettings} onHeightChange={setBottomBarHeight} />
-        </div>
-      )}
+      <div
+        className={`prism-settings-region ${settingsVisible ? '' : 'is-hidden'}`.trim()}
+        style={{ height: settingsHeight }}
+        aria-hidden={!settingsVisible}
+      >
+        <SettingsPanel onHeightChange={setSettingsPanelHeight} />
+        <BottomBar onClose={handleCloseSettings} onHeightChange={setBottomBarHeight} />
+      </div>
 
       <WindowResizeOverlay />
     </div>
diff --git a/src/renderer/mainWindowSettings.ts b/src/renderer/mainWindowSettings.ts
new file mode 100644
index 0000000..f9572c9
--- /dev/null
+++ b/src/renderer/mainWindowSettings.ts
@@ -0,0 +1,15 @@
+export function resolveMainWindowSettingsHeight(
+  settingsOpen: boolean,
+  settingsPanelHeight: number,
+  bottomBarHeight: number,
+): number {
+  if (!settingsOpen) {
+    return 0
+  }
+
+  if (settingsPanelHeight <= 0 || bottomBarHeight <= 0) {
+    return 0
+  }
+
+  return Math.ceil(settingsPanelHeight) + Math.ceil(bottomBarHeight)
+}
diff --git a/src/renderer/styles/globals.css b/src/renderer/styles/globals.css
index 9fb4411..a13a2f2 100644
--- a/src/renderer/styles/globals.css
+++ b/src/renderer/styles/globals.css
@@ -207,6 +207,13 @@ select {
   box-shadow: 0 -16px 34px rgba(0, 0, 0, 0.34);
 }
 
+.prism-settings-region.is-hidden {
+  visibility: hidden;
+  pointer-events: none;
+  border-top-color: transparent;
+  box-shadow: none;
+}
+
 .app-banner-layer {
   position: absolute;
   top: 10px;
diff --git a/src/shared/windowGeometry.ts b/src/shared/windowGeometry.ts
new file mode 100644
index 0000000..b048286
--- /dev/null
+++ b/src/shared/windowGeometry.ts
@@ -0,0 +1,164 @@
+import type { WindowBounds } from '../types/popout'
+
+export interface WorkAreaBounds {
+  x: number
+  y: number
+  width: number
+  height: number
+}
+
+export interface StackableWindowLike {
+  isDestroyed(): boolean
+  isAlwaysOnTop(): boolean
+  moveTop(): void
+}
+
+function getRight(bounds: WorkAreaBounds): number {
+  return bounds.x + bounds.width
+}
+
+function getBottom(bounds: WorkAreaBounds): number {
+  return bounds.y + bounds.height
+}
+
+function rangesOverlap(startA: number, endA: number, startB: number, endB: number): boolean {
+  return startA < endB && startB < endA
+}
+
+function rectsIntersect(a: WorkAreaBounds, b: WorkAreaBounds): boolean {
+  return rangesOverlap(a.x, getRight(a), b.x, getRight(b))
+    && rangesOverlap(a.y, getBottom(a), b.y, getBottom(b))
+}
+
+function clamp(value: number, min: number, max: number): number {
+  if (min > max) {
+    return Math.round((min + max) / 2)
+  }
+
+  return Math.min(max, Math.max(min, value))
+}
+
+function unionBounds(boundsList: readonly WorkAreaBounds[]): WorkAreaBounds {
+  const left = Math.min(...boundsList.map((bounds) => bounds.x))
+  const top = Math.min(...boundsList.map((bounds) => bounds.y))
+  const right = Math.max(...boundsList.map((bounds) => getRight(bounds)))
+  const bottom = Math.max(...boundsList.map((bounds) => getBottom(bounds)))
+
+  return {
+    x: left,
+    y: top,
+    width: right - left,
+    height: bottom - top,
+  }
+}
+
+function normalizeWorkAreas(workAreas: readonly WorkAreaBounds[]): WorkAreaBounds[] {
+  return workAreas
+    .filter((bounds) => bounds.width > 0 && bounds.height > 0)
+    .map((bounds) => ({
+      x: Math.round(bounds.x),
+      y: Math.round(bounds.y),
+      width: Math.round(bounds.width),
+      height: Math.round(bounds.height),
+    }))
+}
+
+export function buildDisplayEnvelope(
+  anchorBounds: WindowBounds,
+  projectedBounds: WorkAreaBounds,
+  workAreas: readonly WorkAreaBounds[],
+): WorkAreaBounds {
+  const normalizedWorkAreas = normalizeWorkAreas(workAreas)
+  if (normalizedWorkAreas.length === 0) {
+    return { ...projectedBounds }
+  }
+
+  const relevant = normalizedWorkAreas.filter((workArea) => {
+    return rectsIntersect(workArea, projectedBounds)
+      || rangesOverlap(workArea.x, getRight(workArea), anchorBounds.x, getRight(anchorBounds))
+  })
+
+  return unionBounds(relevant.length > 0 ? relevant : normalizedWorkAreas)
+}
+
+export function clampBoundsWithinEnvelope(
+  bounds: WindowBounds,
+  envelope: WorkAreaBounds,
+): WindowBounds {
+  const maxX = getRight(envelope) - bounds.width
+  const maxY = getBottom(envelope) - bounds.height
+
+  return {
+    x: clamp(bounds.x, envelope.x, maxX),
+    y: clamp(bounds.y, envelope.y, maxY),
+    width: bounds.width,
+    height: bounds.height,
+  }
+}
+
+export function clampBoundsWithVisibleMargin(
+  bounds: WindowBounds,
+  envelope: WorkAreaBounds,
+  visibleMargin: number,
+): WindowBounds {
+  const margin = Math.max(0, Math.round(visibleMargin))
+  const minX = envelope.x + margin - bounds.width
+  const maxX = getRight(envelope) - margin
+  const minY = envelope.y + margin - bounds.height
+  const maxY = getBottom(envelope) - margin
+
+  return {
+    x: clamp(bounds.x, minX, maxX),
+    y: clamp(bounds.y, minY, maxY),
+    width: bounds.width,
+    height: bounds.height,
+  }
+}
+
+export function resolveExpandedMainWindowBounds(
+  logicalBounds: WindowBounds,
+  settingsHeight: number,
+  workAreas: readonly WorkAreaBounds[],
+): WindowBounds {
+  const nextSettingsHeight = Math.max(0, Math.round(settingsHeight))
+  if (nextSettingsHeight === 0) {
+    return { ...logicalBounds }
+  }
+
+  const projectedBounds: WindowBounds = {
+    x: logicalBounds.x,
+    y: logicalBounds.y,
+    width: logicalBounds.width,
+    height: logicalBounds.height + nextSettingsHeight,
+  }
+
+  const envelope = buildDisplayEnvelope(logicalBounds, projectedBounds, workAreas)
+  return clampBoundsWithinEnvelope(projectedBounds, envelope)
+}
+
+export function clampDraggedMainWindowBounds(
+  actualBounds: WindowBounds,
+  workAreas: readonly WorkAreaBounds[],
+  visibleMargin: number,
+): WindowBounds {
+  const envelope = buildDisplayEnvelope(actualBounds, actualBounds, workAreas)
+  return clampBoundsWithVisibleMargin(actualBounds, envelope, visibleMargin)
+}
+
+export function raiseWindowAboveNormalPopouts(
+  mainWindow: StackableWindowLike | null,
+  popouts: Iterable<StackableWindowLike>,
+): boolean {
+  if (!mainWindow || mainWindow.isDestroyed()) {
+    return false
+  }
+
+  for (const popout of popouts) {
+    if (!popout.isDestroyed() && !popout.isAlwaysOnTop()) {
+      mainWindow.moveTop()
+      return true
+    }
+  }
+
+  return false
+}
diff --git a/test/renderer-helpers.test.ts b/test/renderer-helpers.test.ts
index 371c635..e952351 100644
--- a/test/renderer-helpers.test.ts
+++ b/test/renderer-helpers.test.ts
@@ -10,6 +10,7 @@ import {
   getHorizontalWheelScrollResult,
   normalizeWheelDelta,
 } from '../src/renderer/utils/horizontalWheelScroll'
+import { resolveMainWindowSettingsHeight } from '../src/renderer/mainWindowSettings'
 import {
   formatAstraTime,
   getAstraPlaybackProgress,
@@ -17,6 +18,11 @@ import {
 import {
   createDefaultProfile,
 } from '../src/shared/profileState'
+import {
+  clampDraggedMainWindowBounds,
+  raiseWindowAboveNormalPopouts,
+  resolveExpandedMainWindowBounds,
+} from '../src/shared/windowGeometry'
 import { calculateResizedWindowBounds } from '../src/shared/windowResize'
 import { createDefaultTheme, resolveNativeThemeSource, resolveTheme } from '../src/shared/themeState'
 import { usePerformanceStore } from '../src/renderer/stores/performanceStore'
@@ -418,6 +424,28 @@ function createFakeTransportBridge(): {
   }
 }
 
+function createFakeStackableWindow(alwaysOnTop = false): {
+  getMoveTopCalls: () => number
+  window: {
+    isDestroyed: () => boolean
+    isAlwaysOnTop: () => boolean
+    moveTop: () => void
+  }
+} {
+  let moveTopCalls = 0
+
+  return {
+    getMoveTopCalls: () => moveTopCalls,
+    window: {
+      isDestroyed: () => false,
+      isAlwaysOnTop: () => alwaysOnTop,
+      moveTop: () => {
+        moveTopCalls += 1
+      },
+    },
+  }
+}
+
 function readSpectrumMagnitudes(transport: NativeVisualizerTransport, size = 8): number[] {
   const output = new Float32Array(size)
   const count = transport.fillLatestSpectrumMagnitudes(output)
@@ -1141,6 +1169,78 @@ test('toggleScope appends astra to the scope order when it is enabled from an op
   }
 })
 
+test('resolveMainWindowSettingsHeight waits for real measurements instead of using a placeholder height', () => {
+  assert.equal(resolveMainWindowSettingsHeight(false, 312, 96), 0)
+  assert.equal(resolveMainWindowSettingsHeight(true, 0, 96), 0)
+  assert.equal(resolveMainWindowSettingsHeight(true, 312, 0), 0)
+  assert.equal(resolveMainWindowSettingsHeight(true, 312, 96), 408)
+})
+
+test('expanded main-window bounds can push upward into an overlapping display above', () => {
+  const resolved = resolveExpandedMainWindowBounds(
+    { x: 700, y: 1110, width: 900, height: 180 },
+    400,
+    [
+      { x: 0, y: 0, width: 1920, height: 1080 },
+      { x: 600, y: 1080, width: 720, height: 260 },
+    ],
+  )
+
+  assert.equal(resolved.x, 700)
+  assert.equal(resolved.y, 760)
+  assert.equal(resolved.height, 580)
+})
+
+test('expanded main-window bounds can span into a taller side display instead of clamping to one display', () => {
+  const resolved = resolveExpandedMainWindowBounds(
+    { x: 650, y: 650, width: 400, height: 180 },
+    300,
+    [
+      { x: 0, y: 0, width: 800, height: 800 },
+      { x: 800, y: 0, width: 800, height: 1200 },
+    ],
+  )
+
+  assert.equal(resolved.x, 650)
+  assert.equal(resolved.y, 650)
+  assert.equal(resolved.height, 480)
+})
+
+test('dragged main-window bounds keep a visible grab margin without sticking at a display seam', () => {
+  const clamped = clampDraggedMainWindowBounds(
+    { x: 760, y: 120, width: 400, height: 220 },
+    [
+      { x: 0, y: 0, width: 800, height: 900 },
+      { x: 800, y: 0, width: 800, height: 900 },
+    ],
+    64,
+  )
+
+  assert.equal(clamped.x, 760)
+  assert.equal(clamped.y, 120)
+})
+
+test('raiseWindowAboveNormalPopouts raises the main window when an unpinned popout exists', () => {
+  const main = createFakeStackableWindow()
+  const normalPopout = createFakeStackableWindow(false)
+  const pinnedPopout = createFakeStackableWindow(true)
+
+  const raised = raiseWindowAboveNormalPopouts(main.window, [normalPopout.window, pinnedPopout.window])
+
+  assert.equal(raised, true)
+  assert.equal(main.getMoveTopCalls(), 1)
+})
+
+test('raiseWindowAboveNormalPopouts leaves pinned popouts above the main window', () => {
+  const main = createFakeStackableWindow()
+  const pinnedPopout = createFakeStackableWindow(true)
+
+  const raised = raiseWindowAboveNormalPopouts(main.window, [pinnedPopout.window])
+
+  assert.equal(raised, false)
+  assert.equal(main.getMoveTopCalls(), 0)
+})
+
 test('main-window bounds updates persist working state in Electron mode', () => {
   const previousSettingsState = useSettingsStore.getState()
   const fakeStorage = installFakeLocalStorage()