feat: add icon name combobox component

- Create combobox for icon name selection and creation
- Integrate with PocketBase to fetch existing icon names
- Add input sanitization for icon IDs (lowercase, hyphens only)
- Implement existing icon detection and validation
- Support both selection from existing icons and creation of new ones
- Provide visual feedback for new vs existing icon submissions

web/src/components/icon-name-combobox.tsx

@@ -0,0 +1,113 @@
+"use client"
+
+import { useEffect, useState } from "react"
+import {
+	Combobox,
+	ComboboxContent,
+	ComboboxCreateNew,
+	ComboboxEmpty,
+	ComboboxGroup,
+	ComboboxInput,
+	ComboboxItem,
+	ComboboxList,
+	ComboboxTrigger,
+} from "@/components/ui/shadcn-io/combobox"
+import { pb } from "@/lib/pb"
+
+interface IconNameComboboxProps {
+	value: string
+	onValueChange: (value: string) => void
+	onIsExisting: (isExisting: boolean) => void
+}
+
+export function IconNameCombobox({ value, onValueChange, onIsExisting }: IconNameComboboxProps) {
+	const [existingIcons, setExistingIcons] = useState<Array<{ label: string; value: string }>>([])
+	const [loading, setLoading] = useState(true)
+
+	useEffect(() => {
+		async function fetchExistingIcons() {
+			try {
+				const records = await pb.collection("community_gallery").getFullList({
+					fields: "name",
+					sort: "name",
+				})
+
+				const uniqueNames = Array.from(new Set(records.map((r) => r.name)))
+				const formattedIcons = uniqueNames.map((name) => ({
+					label: name,
+					value: name,
+				}))
+
+				setExistingIcons(formattedIcons)
+			} catch (error) {
+				console.error("Failed to fetch existing icons:", error)
+			} finally {
+				setLoading(false)
+			}
+		}
+
+		fetchExistingIcons()
+	}, [])
+
+	useEffect(() => {
+		const isExisting = existingIcons.some((icon) => icon.value === value)
+		onIsExisting(isExisting)
+	}, [value, existingIcons, onIsExisting])
+
+	const handleCreateNew = (inputValue: string) => {
+		const sanitizedValue = inputValue
+			.toLowerCase()
+			.trim()
+			.replace(/\s+/g, "-")
+			.replace(/[^a-z0-9-]/g, "")
+		onValueChange(sanitizedValue)
+	}
+
+	const handleValueChange = (newValue: string) => {
+		onValueChange(newValue)
+	}
+
+	return (
+		<Combobox data={existingIcons} type="icon" value={value} onValueChange={handleValueChange}>
+			<ComboboxTrigger className="w-full justify-start">
+				{value ? (
+					<span className="flex items-center justify-between w-full">
+						<span className="font-mono">{value}</span>
+					</span>
+				) : (
+					<span className="text-muted-foreground">Select or create icon ID...</span>
+				)}
+			</ComboboxTrigger>
+			<ComboboxContent>
+				<ComboboxInput placeholder="Search or type new icon ID..." />
+				<ComboboxList>
+					<ComboboxEmpty>No existing icon found.</ComboboxEmpty>
+					{existingIcons.length > 0 && (
+						<ComboboxGroup heading="Existing Icons">
+							{existingIcons.map((icon) => (
+								<ComboboxItem key={icon.value} value={icon.value}>
+									<span className="font-mono text-sm">{icon.label}</span>
+								</ComboboxItem>
+							))}
+						</ComboboxGroup>
+					)}
+					<ComboboxCreateNew onCreateNew={handleCreateNew}>
+						{(inputValue) => (
+							<div className="flex items-start gap-2">
+								<span className="text-muted-foreground">Create new icon:</span>
+								<span className="font-mono font-semibold">
+									{inputValue
+										.toLowerCase()
+										.trim()
+										.replace(/\s+/g, "-")
+										.replace(/[^a-z0-9-]/g, "")}
+								</span>
+							</div>
+						)}
+					</ComboboxCreateNew>
+				</ComboboxList>
+			</ComboboxContent>
+		</Combobox>
+	)
+}
+