fix: robust first-launch auto-preload (mobile bible/download)

- OfflineManager.preload accepts bibleTranslations: 'all' and resolves
  translation ids internally from versions.json (single source), removing
  the fragile settings-side fetch that could throw and abort the whole
  download on mobile first launch
- Decouple trigger from '#settings/autopreload' route param via one-shot
  requestAutoPreload()/consumeAutoPreload() flag
- Auto-expand + tick Bible variant checkboxes for UI consistency
- Offer modal sets the flag and navigates to plain '#settings'

src/core/offline-manager.ts

@@ -20,7 +20,7 @@ import { diagLog } from './diag-log';
 export interface PreloadOptions {
   languages: string[];
   types: ('calendar' | 'bible')[];
-  bibleTranslations?: string[];
+  bibleTranslations?: string[] | 'all';
 }
 
 export interface PreloadProgress {
@@ -89,12 +89,36 @@ function getFallbackCalendarFiles(lang: string): string[] {
 
 export class OfflineManager {
   private static _progress: PreloadProgress | null = null;
+  private static _autoPreloadRequested = false;
+
+  /** Request an automatic "preload everything" once the Settings view opens. */
+  static requestAutoPreload() {
+    OfflineManager._autoPreloadRequested = true;
+  }
+
+  /** Consume (one-shot) the automatic preload request. */
+  static consumeAutoPreload(): boolean {
+    const v = OfflineManager._autoPreloadRequested;
+    OfflineManager._autoPreloadRequested = false;
+    return v;
+  }
 
   /** Get size string for a Bible translation. */
   static getBibleSize(translationPath: string): string {
     return BIBLE_SIZES[translationPath] || '?';
   }
 
+  /** Resolve every Bible translation id from versions.json (single source). */
+  static async getAllBibleTranslationIds(): Promise<string[]> {
+    try {
+      const resp = await fetch('/data/bible/versions.json');
+      const versions = await resp.json() as any[];
+      return versions.map((v: any) => v.id);
+    } catch {
+      return [];
+    }
+  }
+
   /** Discover all book files for a Bible translation from versions.json. */
   static async getBibleFiles(translationPath: string): Promise<string[]> {
     const files: string[] = [];
@@ -140,7 +164,10 @@ export class OfflineManager {
     const uniqueFiles = [...new Set(filesToFetch)];
 
     // Add Bible translation files
-    for (const trans of options.bibleTranslations || []) {
+    const bibleTranslations = options.bibleTranslations === 'all'
+      ? await OfflineManager.getAllBibleTranslationIds()
+      : (options.bibleTranslations || []);
+    for (const trans of bibleTranslations) {
       const bibleFiles = await OfflineManager.getBibleFiles(trans);
       for (const f of bibleFiles) {
         if (!uniqueFiles.includes(f)) uniqueFiles.push(f);
@@ -162,7 +189,7 @@ export class OfflineManager {
     diagLog('preload-start', {
       langs: options.languages.join(','),
       types: options.types.join(','),
-      bibles: (options.bibleTranslations || []).length,
+      bibles: bibleTranslations.length,
       total: progress.total,
       manifest: m !== null,
     });

src/ui/app.ts

@@ -12,6 +12,7 @@ import { loadSettings, type Settings } from './settings-view';
 import { getTranslations, type LanguageCode } from '../core/i18n';
 import { DataCache } from '../core/data-cache';
 import { diagLog } from '../core/diag-log';
+import { OfflineManager } from '../core/offline-manager';
 import { markEverInstalled, hasEverInstalledMarker } from '../core/pwa-install';
 
 type View = 'calendar' | 'bible' | 'prayer' | 'akathists' | 'parimii' | 'horologion' | 'sbornik' | 'paraclete' | 'irmologion' | 'menaion' | 'triodion' | 'lives' | 'settings';
@@ -201,7 +202,8 @@ export class App {
 
     document.getElementById('offline-offer-all')?.addEventListener('click', () => {
       overlay.remove();
-      window.location.hash = '#settings/autopreload';
+      OfflineManager.requestAutoPreload();
+      window.location.hash = '#settings';
     });
     document.getElementById('offline-offer-choose')?.addEventListener('click', () => {
       overlay.remove();

src/ui/settings-view.ts

@@ -672,7 +672,7 @@ export class SettingsView {
       }
 
       // Auto-preload everything if triggered from first-launch offer
-      if (this.action === 'autopreload') {
+      if (OfflineManager.consumeAutoPreload() || this.action === 'autopreload') {
         document.querySelectorAll('.offline-lang').forEach(el => (el as HTMLInputElement).checked = true);
         document.querySelectorAll('.offline-type').forEach(el => (el as HTMLInputElement).checked = true);
         const progressDiv = document.getElementById('offline-progress');
@@ -680,20 +680,19 @@ export class SettingsView {
         const progressText = document.getElementById('offline-progress-text');
         if (progressDiv) progressDiv.classList.remove('hidden');
 
+        // Reveal + select all Bible variants for UI consistency
+        document.getElementById('bible-row')?.dispatchEvent(new Event('click'));
+        setTimeout(() => {
+          document.querySelectorAll('.bible-trans').forEach(el => (el as HTMLInputElement).checked = true);
+        }, 300);
+
         const selectedLangs = LANGUAGES.map(l => l.code);
         const selectedTypes: ('calendar' | 'bible')[] = ['calendar', 'bible'];
 
-        let bibleTrans: string[] = [];
-        try {
-          const resp = await fetch('/data/bible/versions.json');
-          const versions = await resp.json();
-          bibleTrans = versions.map((v: any) => v.id);
-        } catch {}
-
         OfflineManager.preload({
           languages: selectedLangs,
           types: selectedTypes,
-          bibleTranslations: bibleTrans,
+          bibleTranslations: 'all',
         }).then((prog) => {
           if (progressBar) progressBar.style.width = '100%';
           if (progressText) {