feat: add file upload dropzone to icon submission dialog

- Add Dropzone component for direct file uploads
- Support multiple image formats (png, jpg, svg, webp)
- Show file preview after upload
- Add divider between dropzone and GitHub issue templates
- Max 5 files with 5MB size limit each

web/src/components/icon-submission-form.tsx

@@ -6,6 +6,7 @@ import Link from "next/link"
 import { useState } from "react"
 import { Button } from "@/components/ui/button"
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogTrigger } from "@/components/ui/dialog"
+import { Dropzone, DropzoneContent, DropzoneEmptyState } from "@/components/ui/shadcn-io/dropzone"
 import { REPO_PATH } from "@/constants"
 
 export const ISSUE_TEMPLATES = [
@@ -41,8 +42,62 @@ export const ISSUE_TEMPLATES = [
 	},
 ]
 export function IconSubmissionContent({ onClose }: { onClose?: () => void }) {
+	const [files, setFiles] = useState<File[] | undefined>()
+	const [filePreview, setFilePreview] = useState<string | undefined>()
+
+	const handleDrop = (files: File[]) => {
+		console.log(files)
+		setFiles(files)
+		if (files.length > 0) {
+			const reader = new FileReader()
+			reader.onload = (e) => {
+				if (typeof e.target?.result === 'string') {
+					setFilePreview(e.target?.result)
+				}
+			}
+			reader.readAsDataURL(files[0])
+		}
+	}
+
 	return (
 		<div className="flex flex-col gap-4">
+			{/* Dropzone Section */}
+			<div className="space-y-3">
+				<h3 className="text-sm font-medium">Upload Icon Files</h3>
+				<Dropzone
+					accept={{ 'image/*': ['.png', '.jpg', '.jpeg', '.svg', '.webp'] }}
+					onDrop={handleDrop}
+					onError={console.error}
+					src={files}
+					maxFiles={5}
+					maxSize={1024 * 1024 * 5}
+				>
+					<DropzoneEmptyState />
+					<DropzoneContent>
+						{filePreview && (
+							<div className="h-[102px] w-full">
+								<img
+									alt="Preview"
+									className="absolute top-0 left-0 h-full w-full object-cover"
+									src={filePreview}
+								/>
+							</div>
+						)}
+					</DropzoneContent>
+				</Dropzone>
+				{files && files.length > 0 && (
+					<div className="text-xs text-muted-foreground">
+						{files.length} file(s) selected
+					</div>
+				)}
+			</div>
+
+			{/* Divider */}
+			<div className="border-t pt-4">
+				<p className="text-sm text-muted-foreground mb-3">Or submit via GitHub issue:</p>
+			</div>
+
+			{/* Issue Templates */}
 			<div className="flex flex-col gap-2">
 				{ISSUE_TEMPLATES.map((template) => (
 					<Link key={template.id} href={template.url} className="w-full group z10" target="_blank" rel="noopener noreferrer">