fix(properties): harden lifecycle and session fencing

- Fence Properties actions and Torrent moves by current caller sessions.
- Preserve move progress and authoritative destinations across stale events and recovery.
- Enforce immutable identity fields and transactional queued-edit rejection.
- Restore subtle theme surfaces and expand regression coverage.

src/utils/downloadActions.test.ts

@@ -72,7 +72,7 @@ describe('download action policy', () => {
       { status: 'completed' },
     ]);
 
-    expect(counts).toEqual({ pause: 3, resume: 4 });
+    expect(counts).toEqual({ pause: 3, resume: 3 });
   });
 
   it('keeps large action badges compact without changing the accessible count', () => {

src/utils/downloadActions.ts

@@ -45,7 +45,10 @@ export const countDownloadActions = (
   downloads: ReadonlyArray<{ status: DownloadStatus }>
 ): DownloadActionCounts => downloads.reduce<DownloadActionCounts>((counts, download) => {
   if (canPauseDownload(download.status)) counts.pause += 1;
-  if (canStartDownload(download.status)) counts.resume += 1;
+  if (download.status === 'paused'
+    || (canStartDownload(download.status) && !canPauseDownload(download.status))) {
+    counts.resume += 1;
+  }
   return counts;
 }, { pause: 0, resume: 0 });
 

src/utils/propertiesPresentation.test.ts

@@ -1,7 +1,33 @@
 import { describe, expect, it } from 'vitest';
-import { getPropertiesConnectionPresentation } from './propertiesPresentation';
+import { getPropertiesConnectionPresentation, getPropertiesProgress } from './propertiesPresentation';
 
 describe('Properties connection presentation', () => {
+  it('uses move progress instead of the completed download fraction during relocation', () => {
+    expect(getPropertiesProgress({
+      status: 'moving',
+      moveProgress: 0.42,
+      fraction: 1,
+      downloadedBytes: 100,
+      totalBytes: 100,
+      totalIsEstimate: false,
+      isMedia: false,
+      size: '100 B',
+    })).toBe(0.42);
+    expect(getPropertiesProgress({
+      status: 'moving',
+      moveProgress: 4,
+      fraction: 0,
+      isMedia: false,
+    })).toBe(1);
+    expect(getPropertiesProgress({
+      status: 'moving',
+      fraction: 1,
+      downloadedBytes: 100,
+      totalBytes: 100,
+      isMedia: false,
+    })).toBe(0);
+  });
+
   it('keeps media concurrency out of the live header metrics', () => {
     expect(getPropertiesConnectionPresentation({
       isMedia: true,

src/utils/propertiesPresentation.ts

@@ -1,4 +1,5 @@
 import type { PropertiesSnapshot } from '../propertiesBridge';
+import { resolveDownloadFraction } from './downloadProgress';
 
 export type PropertiesConnectionKind = 'media' | 'torrent' | 'aria2';
 export type PropertiesConnectionLabelKey = 'fragmentConcurrency' | 'torrentConnectedPeers' | 'connections';
@@ -12,6 +13,12 @@ export type PropertiesConnectionPresentation = {
 
 const displayCount = (value: number | undefined): string => value == null ? '—' : String(value);
 
+export const getPropertiesProgress = (
+  snapshot: Pick<PropertiesSnapshot, 'status' | 'moveProgress' | 'fraction' | 'downloadedBytes' | 'totalBytes' | 'totalIsEstimate' | 'isMedia' | 'size'>,
+): number => snapshot.status === 'moving'
+  ? Math.max(0, Math.min(1, snapshot.moveProgress ?? 0))
+  : resolveDownloadFraction(snapshot);
+
 export const getPropertiesConnectionPresentation = (
   snapshot: Pick<PropertiesSnapshot, 'isMedia' | 'isTorrent' | 'connections' | 'activeConnections' | 'requestedConnections' | 'connectedPeers'>,
 ): PropertiesConnectionPresentation => {