fix: release scroll intents for closed parked tabs

src/renderer/src/components/terminal-pane/terminal-parked-watcher-reconciliation.test.ts

@@ -7,6 +7,10 @@ import {
   reconcileParkedWatcherPtyIds,
   resolveParkedTerminalPaneCandidates
 } from './terminal-parked-watcher-reconciliation'
+import {
+  readTerminalScrollIntentKeyRetention,
+  writeKeyedTerminalScrollIntent
+} from '../../lib/pane-manager/terminal-scroll-intent-key-store'
 
 const TAB_ID = 'tab-1'
 const WORKTREE_ID = 'repo::/worktree'
@@ -86,6 +90,23 @@ describe('paired parked-watcher reconciliation', () => {
   })
 })
 
+it('releases captured scroll-intent keys when a parked tab is closed', () => {
+  writeKeyedTerminalScrollIntent(FIRST_LEAF_ID, {
+    kind: 'pinnedViewport',
+    bufferType: 'normal',
+    viewportY: 4,
+    baseY: 12,
+    revision: 1
+  })
+  captureParkedTerminalPaneCandidates(TAB_ID, WORKTREE_ID, [
+    { ptyId: FIRST_PTY_ID, paneId: 1, leafId: FIRST_LEAF_ID, drivesTabTitle: true }
+  ])
+
+  expect(readTerminalScrollIntentKeyRetention().intents).toBe(1)
+  retireParkedTerminalTab(TAB_ID)
+  expect(readTerminalScrollIntentKeyRetention().intents).toBe(0)
+})
+
 // Why: the sole-newborn parity flag is a fact about the captured PTY, so the
 // layout-fallback rescue must carry it only while the leaf still binds that PTY.
 describe('untouchedFreshSpawn carry through the layout-fallback rescue', () => {

src/renderer/src/components/terminal-pane/terminal-parked-watcher-registry.ts

@@ -10,6 +10,7 @@
 import { discardPreHandlerPtyState, hasPreHandlerPtyExit } from './pty-pre-handler-buffer'
 import { parseRemoteRuntimePtyId } from '../../../../shared/remote-runtime-pty-id'
 import { FLOATING_TERMINAL_WORKTREE_ID } from '../../../../shared/constants'
+import { releaseTerminalScrollIntentKey } from '../../lib/pane-manager/terminal-scroll-intent-key-store'
 
 export type ParkedTerminalPaneCapture = {
   ptyId: string | null
@@ -140,7 +141,16 @@ export function retireParkedTerminalTab(tabId: string): void {
   // Why: explicit tab retirement permanently invalidates both live parked
   // observers and unmounted-pane candidates; neither may reattach later.
   disposeParkedTabWatchers(tabId)
-  capturedPanesByTabId.delete(tabId)
+  const capture = capturedPanesByTabId.get(tabId)
+  if (capture) {
+    // Parked panes never run PaneManager's close teardown. Release their
+    // strong scroll-intent keys here or every closed parked tab leaks one per
+    // leaf for the renderer lifetime.
+    for (const pane of capture.panes) {
+      releaseTerminalScrollIntentKey(pane.leafId)
+    }
+    capturedPanesByTabId.delete(tabId)
+  }
 }
 
 /**