Add CI/CD pipelines, NSIS installer, ES module bundling, and ruff linting

- Add Gitea Actions workflows: test.yml (lint + test on push/PR) and
  release.yml (build + NSIS installer + upload on v* tags)
- Add NSIS installer with optional desktop shortcut and auto-start
- Add esbuild bundler: ES module migration with IIFE bundle output
- Add build-dist-windows.sh for cross-building Windows distribution
- Fix all ruff lint errors (import sorting, unused imports, line length)
- Remove redundant scripts (start-server.bat, stop-server.bat,
  start-server-background.vbs)
- Update CLAUDE.md with CI/CD and release documentation

media_server/static/js/browser.js

@@ -2,6 +2,11 @@
 // Media Browser: Navigation, rendering, search, pagination
 // ============================================================
 
+import {
+    t, showToast, escapeHtml, closeDialog,
+    SEARCH_DEBOUNCE_MS, EMPTY_SVG_FILE, EMPTY_SVG_FOLDER, emptyStateHtml,
+} from './core.js';
+
 // Browser state
 let currentFolderId = null;
 let currentPath = '';
@@ -13,11 +18,11 @@ let viewMode = localStorage.getItem('mediaBrowser.viewMode') || 'grid';
 let cachedItems = null;
 let browserSearchTerm = '';
 let browserSearchTimer = null;
-const thumbnailCache = new Map();
+export const thumbnailCache = new Map();
 const THUMBNAIL_CACHE_MAX = 200;
 
 // Load media folders on page load
-async function loadMediaFolders() {
+export async function loadMediaFolders() {
     try {
         const token = localStorage.getItem('media_server_token');
         if (!token) {
@@ -169,11 +174,11 @@ async function browsePath(folderId, path, offset = 0, nocache = false) {
     }
 }
 
-function renderBreadcrumbs(currentPath, parentPath) {
+function renderBreadcrumbs(currentPathStr, parentPath) {
     const breadcrumb = document.getElementById('breadcrumb');
     breadcrumb.innerHTML = '';
 
-    const parts = (currentPath || '').split('/').filter(p => p);
+    const parts = (currentPathStr || '').split('/').filter(p => p);
     let path = '/';
 
     // Home link (back to folder list)
@@ -373,10 +378,10 @@ function renderBrowserGrid(items, container) {
             // Lazy load thumbnail
             loadThumbnail(thumbnail, item.name);
         } else {
-            const icon = document.createElement('div');
-            icon.className = 'browser-icon';
-            icon.textContent = getFileIcon(item.type);
-            thumbWrapper.appendChild(icon);
+            const iconEl = document.createElement('div');
+            iconEl.className = 'browser-icon';
+            iconEl.textContent = getFileIcon(item.type);
+            thumbWrapper.appendChild(iconEl);
         }
 
         // Play overlay for media files
@@ -527,11 +532,10 @@ async function loadThumbnail(imgElement, fileName) {
             };
 
             // Revoke previous blob URL if not managed by cache
-            // (Cache is keyed by path, so check values)
             if (imgElement.src && imgElement.src.startsWith('blob:')) {
                 let isCached = false;
-                for (const url of thumbnailCache.values()) {
-                    if (url === imgElement.src) { isCached = true; break; }
+                for (const cachedUrl of thumbnailCache.values()) {
+                    if (cachedUrl === imgElement.src) { isCached = true; break; }
                 }
                 if (!isCached) URL.revokeObjectURL(imgElement.src);
             }
@@ -544,10 +548,10 @@ async function loadThumbnail(imgElement, fileName) {
             if (isList) {
                 parent.textContent = '\u{1F3B5}';
             } else {
-                const icon = document.createElement('div');
-                icon.className = 'browser-icon';
-                icon.textContent = '\u{1F3B5}';
-                parent.insertBefore(icon, parent.firstChild);
+                const iconEl = document.createElement('div');
+                iconEl.className = 'browser-icon';
+                iconEl.textContent = '\u{1F3B5}';
+                parent.insertBefore(iconEl, parent.firstChild);
             }
         }
     } catch (error) {
@@ -600,7 +604,7 @@ async function playMediaFile(fileName) {
     }
 }
 
-async function playAllFolder() {
+export async function playAllFolder() {
     if (playInProgress) return;
     playInProgress = true;
     const btn = document.getElementById('playAllBtn');
@@ -634,7 +638,7 @@ async function playAllFolder() {
     }
 }
 
-async function downloadFile(fileName, event) {
+export async function downloadFile(fileName, event) {
     if (event) event.stopPropagation();
     const token = localStorage.getItem('media_server_token');
     if (!token) return;
@@ -699,19 +703,19 @@ function renderPagination() {
     nextBtn.disabled = currentPage === totalPages;
 }
 
-function previousPage() {
+export function previousPage() {
     if (currentOffset >= itemsPerPage) {
         browsePath(currentFolderId, currentPath, currentOffset - itemsPerPage);
     }
 }
 
-function nextPage() {
+export function nextPage() {
     if (currentOffset + itemsPerPage < totalItems) {
         browsePath(currentFolderId, currentPath, currentOffset + itemsPerPage);
     }
 }
 
-function refreshBrowser() {
+export function refreshBrowser() {
     if (currentFolderId) {
         browsePath(currentFolderId, currentPath, currentOffset, true);
     } else {
@@ -720,7 +724,7 @@ function refreshBrowser() {
 }
 
 // Browser search
-function onBrowserSearch() {
+export function onBrowserSearch() {
     const input = document.getElementById('browserSearchInput');
     const clearBtn = document.getElementById('browserSearchClear');
     const term = input.value.trim();
@@ -735,7 +739,7 @@ function onBrowserSearch() {
     }, SEARCH_DEBOUNCE_MS);
 }
 
-function clearBrowserSearch() {
+export function clearBrowserSearch() {
     const input = document.getElementById('browserSearchInput');
     input.value = '';
     document.getElementById('browserSearchClear').style.display = 'none';
@@ -768,7 +772,7 @@ function showBrowserSearch(visible) {
     }
 }
 
-function setViewMode(mode) {
+export function setViewMode(mode) {
     if (mode === viewMode) return;
     viewMode = mode;
     localStorage.setItem('mediaBrowser.viewMode', mode);
@@ -786,7 +790,7 @@ function setViewMode(mode) {
     }
 }
 
-function onItemsPerPageChanged() {
+export function onItemsPerPageChanged() {
     const select = document.getElementById('itemsPerPageSelect');
     itemsPerPage = parseInt(select.value);
     localStorage.setItem('mediaBrowser.itemsPerPage', itemsPerPage);
@@ -798,7 +802,7 @@ function onItemsPerPageChanged() {
     }
 }
 
-function goToPage() {
+export function goToPage() {
     const pageInput = document.getElementById('pageInput');
     const totalPages = Math.ceil(totalItems / itemsPerPage);
     let page = parseInt(pageInput.value);
@@ -813,7 +817,7 @@ function goToPage() {
     }
 }
 
-function initBrowserToolbar() {
+export function initBrowserToolbar() {
     // Restore view mode
     const savedViewMode = localStorage.getItem('mediaBrowser.viewMode') || 'grid';
     viewMode = savedViewMode;
@@ -865,18 +869,16 @@ function loadLastBrowserPath() {
 }
 
 // Folder Management
-function showManageFoldersDialog() {
+export function showManageFoldersDialog() {
     // TODO: Implement folder management UI
-    // For now, show a simple alert
     showToast(t('browser.manage_folders_hint'), 'info');
 }
 
-function closeFolderDialog() {
+export function closeFolderDialog() {
     closeDialog(document.getElementById('folderDialog'));
 }
 
-async function saveFolder(event) {
+export async function saveFolder(event) {
     event.preventDefault();
-    // TODO: Implement folder save functionality
     closeFolderDialog();
 }