build fixes - type errors, missing icons, tauri externals, unused imports

src/stores/downloads-store.ts

@@ -20,7 +20,7 @@ export interface DownloadItem {
 
 interface State {
   items: DownloadItem[]
-  add: (item: Omit<DownloadItem, 'id' | 'status' | 'progress' | 'createdAt'>) => void
+  add: (item: Omit<DownloadItem, 'id' | 'status' | 'progress' | 'createdAt'>) => DownloadItem
   update: (id: string, patch: Partial<DownloadItem>) => void
   remove: (id: string) => void
   clearCompleted: () => void
@@ -35,18 +35,19 @@ export const useDownloads = create<State>()(
   persist(
     (set, get) => ({
       items: [],
-      add: item =>
-        set(s => {
-          if (s.items.some(i => i.itemId === item.itemId && i.status !== 'error')) return s
-          const next: DownloadItem = {
-            ...item,
-            id: uid(),
-            status: 'queued',
-            progress: 0,
-            createdAt: new Date().toISOString(),
-          }
-          return { items: [...s.items, next] }
-        }),
+      add: item => {
+        const existing = get().items.find(i => i.itemId === item.itemId && i.status !== 'error')
+        if (existing) return existing
+        const next: DownloadItem = {
+          ...item,
+          id: uid(),
+          status: 'queued',
+          progress: 0,
+          createdAt: new Date().toISOString(),
+        }
+        set(s => ({ items: [...s.items, next] }))
+        return next
+      },
       update: (id, patch) =>
         set(s => ({
           items: s.items.map(i => (i.id === id ? { ...i, ...patch } : i)),