feat: add HeroUploadZone component for file uploads and ToolSelectorModal for tool selection

- Implemented HeroUploadZone for drag-and-drop file uploads with support for various file types (PDF, images, video, Word documents).
- Integrated ToolSelectorModal to display available tools based on the uploaded file type.
- Added Zustand store for managing file state across routes.
- Updated multiple tool components to accept files from the new upload zone.
- Enhanced internationalization support with new translations for upload prompts and tool selection.
- Styled the upload zone and modal for improved user experience.

frontend/src/components/tools/VideoToGif.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Helmet } from 'react-helmet-async';
 import { Film } from 'lucide-react';
@@ -9,6 +9,7 @@ import AdSlot from '@/components/layout/AdSlot';
 import { useFileUpload } from '@/hooks/useFileUpload';
 import { useTaskPolling } from '@/hooks/useTaskPolling';
 import { generateToolSchema } from '@/utils/seo';
+import { useFileStore } from '@/stores/fileStore';
 
 export default function VideoToGif() {
   const { t } = useTranslation();
@@ -45,6 +46,16 @@ export default function VideoToGif() {
     onError: () => setPhase('done'),
   });
 
+  // Accept file from homepage smart upload
+  const storeFile = useFileStore((s) => s.file);
+  const clearStoreFile = useFileStore((s) => s.clearFile);
+  useEffect(() => {
+    if (storeFile) {
+      selectFile(storeFile);
+      clearStoreFile();
+    }
+  }, []); // eslint-disable-line react-hooks/exhaustive-deps
+
   const handleUpload = async () => {
     const id = await startUpload();
     if (id) setPhase('processing');