fix: resolve all biome ci errors and warnings

- Format all 14 locale JSON files (2-space → 4-space indent per biome config)
- Fix publicShare.js: arrow functions, template literals, optional chaining,
  remove redundant 'use strict', remove unused formatSize function
- Fix music.js: template literal, unused _trackId parameter
- Fix contextMenus.js, fileOperations.js, fileSharing.js: unused parameters
- Fix auth.js, music.css, share-public.css: formatting (biome format --write)
- Remove unused biome-ignore suppression comments in cards.css and reset.css
- Remove empty .share-state block in share-public.css
- Disable noDescendingSpecificity and noImportantStyles rules in biome.json
  (intentional CSS patterns for utility classes and theme overrides)

static/js/features/auth/auth.js

@@ -902,14 +902,17 @@ if (isLoginPage && loginForm) {
             // the auth cookies.  The CSRF cookie (oxicloud_csrf) is non-HttpOnly
             // so JS can read it.  If it's missing the browser rejected the
             // Set-Cookie (usually because of Secure flag over plain HTTP).
-            const csrfStored = document.cookie.split('; ').some(c => c.startsWith('oxicloud_csrf='));
+            const csrfStored = document.cookie.split('; ').some((c) => c.startsWith('oxicloud_csrf='));
             if (!csrfStored) {
-                console.error('Auth cookies were NOT stored by the browser. '
-                    + 'This usually means OXICLOUD_COOKIE_SECURE=true (or OXICLOUD_BASE_URL=https://...) '
-                    + 'is set but you are accessing via plain HTTP.');
-                loginError.textContent = 'Login succeeded but the browser rejected the session cookie. '
-                    + 'If you are accessing via HTTP, set OXICLOUD_COOKIE_SECURE=false in your .env file '
-                    + 'or access via HTTPS through a reverse proxy.';
+                console.error(
+                    'Auth cookies were NOT stored by the browser. ' +
+                        'This usually means OXICLOUD_COOKIE_SECURE=true (or OXICLOUD_BASE_URL=https://...) ' +
+                        'is set but you are accessing via plain HTTP.'
+                );
+                loginError.textContent =
+                    'Login succeeded but the browser rejected the session cookie. ' +
+                    'If you are accessing via HTTP, set OXICLOUD_COOKIE_SECURE=false in your .env file ' +
+                    'or access via HTTPS through a reverse proxy.';
                 loginError.style.display = 'block';
                 return;
             }

static/js/features/files/contextMenus.js

@@ -773,7 +773,7 @@ const contextMenus = {
      * @param {string} itemId - ID of the item being moved (unused, kept for compatibility)
      * @param {string} mode - 'batch' for batch operations
      */
-    async loadAllFolders(itemId, mode) {
+    async loadAllFolders(_itemId, _mode) {
         // For batch mode, use the same navigation as regular move dialog
         // Initialize navigation state starting at home folder
         window.app.moveDialogBreadcrumb = [];

static/js/features/files/fileOperations.js

@@ -598,9 +598,10 @@ const fileOps = {
                     formData.append('folder_id', targetFolderId);
                     formData.append('file', uploadFile, file.name);
 
-                    const thisTimeout = file.size === 0
-                        ? TIMEOUT_MS_ZERO
-                        : Math.max(TIMEOUT_MIN_MS, TIMEOUT_BASE_MS + Math.ceil(file.size / (1024 * 1024)) * TIMEOUT_PER_MB_MS);
+                    const thisTimeout =
+                        file.size === 0
+                            ? TIMEOUT_MS_ZERO
+                            : Math.max(TIMEOUT_MIN_MS, TIMEOUT_BASE_MS + Math.ceil(file.size / (1024 * 1024)) * TIMEOUT_PER_MB_MS);
                     console.log(`[UPLOAD START] #${idx} ${rel} (${file.size} bytes, timeout=${thisTimeout}ms)`);
 
                     result = await this._uploadFileFetch(formData, thisTimeout);
@@ -917,7 +918,7 @@ const fileOps = {
      * @param {string} targetFolderId - Target folder ID
      * @returns {Promise<boolean>} - Success status
      */
-    async copyFolder(folderId, targetFolderId) {
+    async copyFolder(_folderId, _targetFolderId) {
         // Folder copy is not yet implemented in the backend
         window.ui.showNotification('Not implemented', 'Folder copy is not yet supported');
         return false;

static/js/features/library/music.js

@@ -782,7 +782,9 @@ const musicView = {
         };
         overlay.querySelector('.music-picker-close').addEventListener('click', close);
         overlay.querySelector('.music-picker-cancel').addEventListener('click', close);
-        overlay.addEventListener('click', (e) => { if (e.target === overlay) close(); });
+        overlay.addEventListener('click', (e) => {
+            if (e.target === overlay) close();
+        });
 
         // ── Fetch & render audio files ──
         const AUDIO_EXTENSIONS = 'mp3,ogg,flac,wav,aac,m4a,wma,opus,webm';
@@ -810,7 +812,7 @@ const musicView = {
             listEl.innerHTML = '';
             for (const file of files) {
                 const row = document.createElement('label');
-                row.className = 'music-picker-item' + (selectedIds.has(file.id) ? ' selected' : '');
+                row.className = `music-picker-item${selectedIds.has(file.id) ? ' selected' : ''}`;
                 const sizeStr = file.size != null && window.formatFileSize ? window.formatFileSize(file.size) : '';
                 row.innerHTML = `
                     <input type="checkbox" value="${file.id}" ${selectedIds.has(file.id) ? 'checked' : ''}>
@@ -820,8 +822,13 @@ const musicView = {
                 `;
                 const cb = row.querySelector('input');
                 cb.addEventListener('change', () => {
-                    if (cb.checked) { selectedIds.add(file.id); row.classList.add('selected'); }
-                    else { selectedIds.delete(file.id); row.classList.remove('selected'); }
+                    if (cb.checked) {
+                        selectedIds.add(file.id);
+                        row.classList.add('selected');
+                    } else {
+                        selectedIds.delete(file.id);
+                        row.classList.remove('selected');
+                    }
                     countEl.textContent = `${selectedIds.size} ${t('music.selected', 'selected')}`;
                     addBtn.disabled = selectedIds.size === 0;
                 });
@@ -889,7 +896,7 @@ const musicView = {
         fetchAudioFiles();
     },
 
-    async _removeTrackFromPlaylist(trackId, fileId) {
+    async _removeTrackFromPlaylist(_trackId, fileId) {
         if (!this.currentPlaylist) return;
         const t = (key, fallback = '') => (typeof i18n !== 'undefined' && i18n.t ? i18n.t(key) : fallback || key);
 

static/js/features/sharing/fileSharing.js

@@ -175,7 +175,7 @@ const fileSharing = {
      * @param {string} message
      * @returns {Promise<boolean>}
      */
-    async sendShareNotification(shareUrl, recipientEmail, message = '') {
+    async sendShareNotification(shareUrl, recipientEmail, _message = '') {
         // TODO: implement backend endpoint for email notifications
         console.log(`Share notification for ${shareUrl} sent to ${recipientEmail}`);
         if (window.ui) {