feat:comments

added comments feature.
- this makes sure the user has the ability to comment on a certain find.
it includes functionality to the api-sync layer so that multiple
components can stay in sync with the comments state.
- it also added the needed db migrations to the finds
- it adds some ui components needed to create, list and view comments

src/lib/components/CommentForm.svelte

@@ -0,0 +1,117 @@
+<script lang="ts">
+	import { Button } from '$lib/components/button';
+	import { Input } from '$lib/components/input';
+	import { Send } from '@lucide/svelte';
+
+	interface CommentFormProps {
+		onSubmit: (content: string) => void;
+		placeholder?: string;
+		disabled?: boolean;
+	}
+
+	let { onSubmit, placeholder = 'Add a comment...', disabled = false }: CommentFormProps = $props();
+
+	let content = $state('');
+	let isSubmitting = $state(false);
+
+	function handleSubmit(event: Event) {
+		event.preventDefault();
+
+		const trimmedContent = content.trim();
+		if (!trimmedContent || isSubmitting || disabled) {
+			return;
+		}
+
+		if (trimmedContent.length > 500) {
+			return;
+		}
+
+		isSubmitting = true;
+
+		try {
+			onSubmit(trimmedContent);
+			content = '';
+		} catch (error) {
+			console.error('Error submitting comment:', error);
+		} finally {
+			isSubmitting = false;
+		}
+	}
+
+	function handleKeyDown(event: KeyboardEvent) {
+		if (event.key === 'Enter' && !event.shiftKey) {
+			event.preventDefault();
+			handleSubmit(event);
+		}
+	}
+
+	const canSubmit = $derived(
+		content.trim().length > 0 && content.length <= 500 && !isSubmitting && !disabled
+	);
+</script>
+
+<form class="comment-form" onsubmit={handleSubmit}>
+	<div class="input-container">
+		<Input
+			bind:value={content}
+			{placeholder}
+			disabled={disabled || isSubmitting}
+			class="comment-input"
+			onkeydown={handleKeyDown}
+		/>
+
+		<Button type="submit" variant="ghost" size="sm" disabled={!canSubmit} class="submit-button">
+			<Send size={16} />
+		</Button>
+	</div>
+
+	{#if content.length > 450}
+		<div class="character-count" class:warning={content.length > 500}>
+			{content.length}/500
+		</div>
+	{/if}
+</form>
+
+<style>
+	.comment-form {
+		padding: 0.75rem 0;
+		border-top: 1px solid hsl(var(--border));
+	}
+
+	.input-container {
+		display: flex;
+		gap: 0.5rem;
+		align-items: center;
+	}
+
+	:global(.comment-input) {
+		flex: 1;
+		min-height: 40px;
+		resize: none;
+	}
+
+	:global(.submit-button) {
+		flex-shrink: 0;
+		color: hsl(var(--muted-foreground));
+		padding: 0.5rem;
+	}
+
+	:global(.submit-button:not(:disabled)) {
+		color: hsl(var(--primary));
+	}
+
+	:global(.submit-button:not(:disabled):hover) {
+		background: hsl(var(--primary) / 0.1);
+	}
+
+	.character-count {
+		font-size: 0.75rem;
+		color: hsl(var(--muted-foreground));
+		text-align: right;
+		margin-top: 0.25rem;
+	}
+
+	.character-count.warning {
+		color: hsl(var(--destructive));
+	}
+</style>