refactor habit creation form to support both creation and editing

src/routes/(app)/habits/+page.svelte

@@ -93,10 +93,10 @@
 					</Button>
 				</Dialog.Trigger>
 				<Dialog.Content class="sm:max-w-lg">
-					<HabitCreationForm 
-						onHabitCreated={() => {
+					<HabitCreationForm
+						onComplete={() => {
 							showCreateDialog = false;
-						}} 
+						}}
 					/>
 				</Dialog.Content>
 			</Dialog.Root>

src/routes/(app)/habits/HabitActionMenu.svelte

@@ -1,23 +1,21 @@
 <script lang="ts">
 	import * as DropdownMenu from '$lib/components/ui/dropdown-menu/index.js';
-	import { Button, buttonVariants } from '$lib/components/ui/button/index.js';
+	import { Button } from '$lib/components/ui/button/index.js';
 	import { EllipsisVertical, Pencil, Trash2 } from '@lucide/svelte';
 	import * as AlertDialog from '$lib/components/ui/alert-dialog/index.js';
 	import * as Dialog from '$lib/components/ui/dialog/index.js';
-	import { Input } from '$lib/components/ui/input/index.js';
-	import { Label } from '$lib/components/ui/label/index.js';
 	import { getHabitService } from '$lib/context/habits.svelte';
-	
+	import HabitCreationForm from './HabitCreationForm.svelte';
+
 	const habitService = getHabitService();
 
-	let { habitId } = $props();
+	let { habitId }: { habitId: string } = $props();
 
 	// Get the current habit reactively from the service
-	const currentHabit = $derived(habitService.habits.find(h => h.id === habitId));
+	const currentHabit = $derived(habitService.habits.find((h) => h.id === habitId));
 
 	let deleteHabitDialog = $state(false);
 	let editHabitDialog = $state(false);
-
 </script>
 
 <DropdownMenu.Root>
@@ -47,26 +45,10 @@
 
 <!-- Edit Habit Dialog -->
 <Dialog.Root bind:open={editHabitDialog}>
-	<Dialog.Content class="sm:max-w-110">
-		<Dialog.Header>
-			<Dialog.Title>Edit profile</Dialog.Title>
-			<Dialog.Description>
-				Make changes to your profile here. Click save when you're done.
-			</Dialog.Description>
-		</Dialog.Header>
-		<div class="grid gap-4 py-4">
-			<div class="grid grid-cols-4 items-center gap-4">
-				<Label for="name" class="text-right">Name</Label>
-				<Input id="name" value="Pedro Duarte" class="col-span-3" />
-			</div>
-			<div class="grid grid-cols-4 items-center gap-4">
-				<Label for="username" class="text-right">Username</Label>
-				<Input id="username" value="@peduarte" class="col-span-3" />
-			</div>
-		</div>
-		<Dialog.Footer>
-			<Button type="submit">Save changes</Button>
-		</Dialog.Footer>
+	<Dialog.Content class="sm:max-w-lg">
+		{#if currentHabit}
+			<HabitCreationForm habit={currentHabit} onComplete={() => { editHabitDialog = false; }} />
+		{/if}
 	</Dialog.Content>
 </Dialog.Root>
 

src/routes/(app)/habits/HabitCreationForm.svelte

@@ -7,58 +7,86 @@
 	import * as Collapsible from '$lib/components/ui/collapsible';
 	import { ChevronDown, ChevronUp } from '@lucide/svelte';
 	import { getHabitService } from '$lib/context/habits.svelte';
+	import type { Habit } from '$lib/triplit/schema';
+
+	let {
+		habit,
+		onComplete
+	}: {
+		habit?: Habit;
+		onComplete?: () => Promise<void> | void;
+	} = $props();
 
-	let { onHabitCreated }: { onHabitCreated?: () => Promise<void> | void } = $props();
-	
 	const habitService = getHabitService();
 
+	const isEditMode = $derived(!!habit);
+
 	let showAdvancedOptions = $state(false);
 	let isSubmitting = $state(false);
 
-	// Form fields
-	let name = $state('');
-	let target = $state(1);
-	let duration = $state(1);
-	let unit = $state('');
-	let increment = $state(1);
-	let startDate = $state(new Date().toISOString().split('T')[0]);
-	let active = $state(true);
+	// Form fields - initialize from habit if editing
+	let name = $state(habit?.name ?? '');
+	let target = $state(habit?.target ?? 1);
+	let duration = $state(habit?.duration ?? 1);
+	let unit = $state(habit?.unit ?? '');
+	let increment = $state(habit?.increment ?? 1);
+	let startDate = $state(
+		habit?.startDate
+			? habit.startDate.toISOString().split('T')[0]
+			: new Date().toISOString().split('T')[0]
+	);
+	let active = $state(habit?.active ?? true);
 
+	// Re-initialize when habit changes (for edit mode)
+	$effect(() => {
+		if (habit) {
+			name = habit.name;
+			target = habit.target;
+			duration = habit.duration;
+			unit = habit.unit;
+			increment = habit.increment;
+			startDate = habit.startDate.toISOString().split('T')[0];
+			active = habit.active;
+		}
+	});
 
 	async function handleSubmit() {
 		if (isSubmitting || !name.trim()) return;
-		
+
 		try {
 			isSubmitting = true;
-			
-			await habitService.createHabit({
+
+			const habitData = {
 				name,
 				target,
 				duration,
 				increment,
 				unit,
 				startDate: (() => {
-					// Create date in local timezone to avoid UTC conversion issues
 					const [year, month, day] = startDate.split('-').map(Number);
 					return new Date(year, month - 1, day);
 				})(),
 				active
-			})
+			};
 
-			// Reset form
-			name = '';
-			target = 1;
-			duration = 1;
-			unit = '';
-			increment = 1;
-			startDate = new Date().toISOString().split('T')[0];
-			active = true;
-			showAdvancedOptions = false;
-			
-			// Notify parent
-			onHabitCreated?.();
+			if (isEditMode && habit) {
+				await habitService.updateHabit(habit.id, habitData);
+			} else {
+				await habitService.createHabit(habitData);
+				// Reset form only for create mode
+				name = '';
+				target = 1;
+				duration = 1;
+				unit = '';
+				increment = 1;
+				startDate = new Date().toISOString().split('T')[0];
+				active = true;
+				showAdvancedOptions = false;
+			}
+
+			onComplete?.();
 		} catch (error) {
-			console.error('Failed to create habit:', error);
+			console.error(`Failed to ${isEditMode ? 'update' : 'create'} habit:`, error);
 		} finally {
 			isSubmitting = false;
 		}
@@ -66,9 +94,11 @@
 </script>
 
 <Dialog.Header>
-	<Dialog.Title>Create a new habit</Dialog.Title>
+	<Dialog.Title>{isEditMode ? 'Edit habit' : 'Create a new habit'}</Dialog.Title>
 	<Dialog.Description>
-		Add a new habit to track. Set your target and customize the tracking period.
+		{isEditMode
+			? 'Update your habit settings. Click save when you\'re done.'
+			: 'Add a new habit to track. Set your target and customize the tracking period.'}
 	</Dialog.Description>
 </Dialog.Header>
 
@@ -217,15 +247,15 @@
 			Cancel
 		</Button>
 	</Dialog.Close>
-	<Button 
+	<Button
 		onclick={handleSubmit}
 		disabled={isSubmitting || !name.trim()}
 		class="gap-2"
 	>
 		{#if isSubmitting}
-			Creating...
+			{isEditMode ? 'Saving...' : 'Creating...'}
 		{:else}
-			Create Habit
+			{isEditMode ? 'Save Changes' : 'Create Habit'}
 		{/if}
 	</Button>
 </Dialog.Footer>