feat: seamless auto-update via electron-updater, multi-select filters, session restore

- electron-updater wired with Gitea API discovery: setFeedURL dynamically
  per release (Gitea 1.24.7 lacks /releases/latest/download/ shortcut).
  Differential download via .blockmap saves ~70 MB per patch. Renderer
  banner shows states: available → downloading X% → ready. User clicks
  "Установить и перезапустить" → quitAndInstall replaces files + relaunches.
- Multi-select filters per user spec: genres AND (TMDB with_genres comma-
  joined), countries OR (pipe-joined into with_origin_country /
  with_original_language), years OR (fan-out one request per year, merge
  by id since TMDB has no discrete-year OR). Rating stays single threshold.
- Session persistence: openedSession {tabs, activeName} saved to config
  on tab create/show/hide/remove/in-app navigation, plus before-quit.
  Restored after did-finish-load via ipcMain.emit('create-view',...) per
  tab. Survives auto-update relaunch — bring user back to the same page.
- electron-builder publish config (generic provider) so latest.yml is
  generated during build.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/styles/main.css

@@ -788,6 +788,44 @@ body {
 .ms-genre-chip:hover { background: rgba(255,255,255,0.1); color: #ccc; }
 .ms-genre-chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
 
+.ms-genres-hint {
+  font-size: 10px;
+  color: #666;
+  font-style: italic;
+  align-self: center;
+  margin-left: 6px;
+}
+
+/* Multi-select dropdown */
+.ms-multi-dropdown { overflow-y: auto; }
+.ms-multi-opt { display: flex; align-items: center; gap: 8px; }
+.ms-multi-opt.active { color: #eee; font-weight: 500; }
+.ms-checkbox {
+  width: 14px;
+  height: 14px;
+  border-radius: 3px;
+  border: 1.5px solid #555;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  color: #fff;
+  flex-shrink: 0;
+}
+.ms-checkbox.on { background: var(--accent); border-color: var(--accent); }
+
+.ms-multi-clear {
+  background: transparent;
+  border: none;
+  color: #777;
+  cursor: pointer;
+  padding: 2px;
+  display: flex;
+  align-items: center;
+  margin-left: auto;
+  margin-right: 2px;
+}
+.ms-multi-clear:hover { color: #fff; }
+
 .ms-load-more {
   display: block;
   margin: 20px auto 8px;
@@ -1442,6 +1480,32 @@ body {
 }
 .update-banner-close:hover { color: #fff; }
 
+.update-banner-progress {
+  flex: 1;
+  height: 4px;
+  background: rgba(255,255,255,0.08);
+  border-radius: 2px;
+  overflow: hidden;
+  min-width: 80px;
+  max-width: 200px;
+}
+.update-banner-progress-bar {
+  height: 100%;
+  background: linear-gradient(90deg, #E50914, #ff5252);
+  transition: width 0.3s ease;
+}
+
+.update-banner-spinner {
+  width: 12px;
+  height: 12px;
+  border: 2px solid rgba(255,255,255,0.15);
+  border-top-color: #E50914;
+  border-radius: 50%;
+  animation: ub-spin 0.8s linear infinite;
+  display: inline-block;
+}
+@keyframes ub-spin { to { transform: rotate(360deg); } }
+
 /* ---- Retry btn ---- */
 .ms-retry-btn {
   background: none;