diff --git a/scripts/build-linux-appimage.js b/scripts/build-linux-appimage.js
index cd41ff1..d12f119 100644
--- a/scripts/build-linux-appimage.js
+++ b/scripts/build-linux-appimage.js
@@ -11,7 +11,7 @@ let receivedSignal;
 export const APPIMAGE_CONFIG = JSON.stringify({
   bundle: {
     resources: {
-      'engine-dist/': null,
+      '../THIRD_PARTY_NOTICES.md': 'THIRD_PARTY_NOTICES.md',
     },
   },
 });
diff --git a/scripts/build-linux-appimage.node-test.js b/scripts/build-linux-appimage.node-test.js
index 0f1c69f..158473b 100644
--- a/scripts/build-linux-appimage.node-test.js
+++ b/scripts/build-linux-appimage.node-test.js
@@ -2,11 +2,11 @@ import assert from 'node:assert/strict';
 import test from 'node:test';
 import { APPIMAGE_CONFIG, appImageBundleArguments } from './build-linux-appimage.js';
 
-test('AppImage config removes only engine-dist from Tauri resources', () => {
+test('AppImage config keeps notices while excluding the staged engine payload', () => {
   assert.deepEqual(JSON.parse(APPIMAGE_CONFIG), {
     bundle: {
       resources: {
-        'engine-dist/': null,
+        '../THIRD_PARTY_NOTICES.md': 'THIRD_PARTY_NOTICES.md',
       },
     },
   });
diff --git a/src/utils/dateTime.test.ts b/src/utils/dateTime.test.ts
index 508343f..26fd05b 100644
--- a/src/utils/dateTime.test.ts
+++ b/src/utils/dateTime.test.ts
@@ -58,6 +58,14 @@ describe('date/time formatting', () => {
     expect(formatted).toContain('123');
   });
 
+  it('uses the default Persian date when only locale or timezone options are supplied', () => {
+    expect(formatDateTime(instant, {
+      locale: 'fa',
+      calendar: 'persian',
+      options: { timeZone: 'UTC' }
+    })).toBe('۱۴۰۵/۰۱/۰۱');
+  });
+
   it('returns a safe placeholder for malformed timestamps and rejects unknown preferences', () => {
     expect(formatDateTime('not-a-timestamp', { locale: 'en' })).toBe('-');
     expect(isCalendarPreference('gregorian')).toBe(true);
diff --git a/src/utils/dateTime.ts b/src/utils/dateTime.ts
index 0ff50c0..a789e2e 100644
--- a/src/utils/dateTime.ts
+++ b/src/utils/dateTime.ts
@@ -79,7 +79,10 @@ const formatPersianDateTime = (
   const hasDateOptions = Object.keys(options).some(key => DATE_OPTION_KEYS.has(key));
   const hasTimeOptions = options.timeStyle !== undefined ||
     TIME_OPTION_KEYS.some(key => (options as unknown as Record<string, unknown>)[key] !== undefined);
-  const includeDate = Object.keys(options).length === 0 || hasDateOptions;
+  // Locale and timezone options do not select a date or time field by
+  // themselves. Match Intl's default date behavior for those option-only
+  // calls instead of returning an empty string.
+  const includeDate = hasDateOptions || !hasTimeOptions;
   const parts: string[] = [];
 
   if (includeDate) {
diff --git a/src/utils/downloads.test.ts b/src/utils/downloads.test.ts
index 9021494..50fa740 100644
--- a/src/utils/downloads.test.ts
+++ b/src/utils/downloads.test.ts
@@ -66,6 +66,13 @@ describe('download connection resolution', () => {
 });
 
 describe('download filename matching', () => {
+  it('matches frontend filenames to the backend Windows device-name canonicalization', () => {
+    expect(canonicalizeDownloadFileName('CON.txt')).toBe('CON-.txt');
+    expect(canonicalizeDownloadFileName('com1.archive.zip')).toBe('com1.archive-.zip');
+    expect(downloadFileNamesMatch('CON-.txt', 'CON.txt')).toBe(true);
+    expect(downloadFileNamesMatch('console.txt', 'CON.txt')).toBe(false);
+  });
+
   it('truncates long names by UTF-8 bytes while preserving the extension', () => {
     const filename = canonicalizeDownloadFileName(`${'title '.repeat(100)}.mp4`);
 
diff --git a/src/utils/downloads.ts b/src/utils/downloads.ts
index dbe73e6..5998b71 100644
--- a/src/utils/downloads.ts
+++ b/src/utils/downloads.ts
@@ -48,6 +48,17 @@ export const DOWNLOAD_CONNECTIONS_MAX = 16;
 // bound is also conservative for Windows filename components.
 export const MAX_DOWNLOAD_FILENAME_BYTES = 255;
 const FILENAME_TRUNCATION_MARKER = '…';
+const WINDOWS_RESERVED_FILENAME_STEMS = new Set([
+  'CON',
+  'PRN',
+  'AUX',
+  'NUL',
+  'CLOCK$',
+  'CONIN$',
+  'CONOUT$',
+  ...Array.from({ length: 9 }, (_, index) => `COM${index + 1}`),
+  ...Array.from({ length: 9 }, (_, index) => `LPT${index + 1}`)
+]);
 
 const utf8ByteLength = (value: string): number => new TextEncoder().encode(value).length;
 
@@ -150,7 +161,14 @@ export const canonicalizeDownloadFileName = (fileName: string): string => {
     .replace(/[\u0000-\u001f\u007f-\u009f<>:"/\\|?*]/g, '-')
     .trim()
     .replace(/[. ]+$/g, '');
-  const canonical = sanitized && sanitized !== '.' && sanitized !== '..' ? sanitized : 'download';
+  let canonical = sanitized && sanitized !== '.' && sanitized !== '..' ? sanitized : 'download';
+  const reservedStem = canonical.split('.')[0]?.toUpperCase();
+  if (reservedStem && WINDOWS_RESERVED_FILENAME_STEMS.has(reservedStem)) {
+    const extensionStart = canonical.lastIndexOf('.');
+    const base = extensionStart > 0 ? canonical.slice(0, extensionStart) : canonical;
+    const extension = extensionStart > 0 ? canonical.slice(extensionStart) : '';
+    canonical = `${base}-${extension}`;
+  }
   if (utf8ByteLength(canonical) <= MAX_DOWNLOAD_FILENAME_BYTES) return canonical;
 
   const extensionStart = canonical.lastIndexOf('.');