Fix ColorPicker solid color issues, add per-field reset, regroup accents

ColorPicker fixes:
- Color picker now initializes to default color instead of black when
  field is cleared/empty
- Switching Solid<>Gradient no longer emits black; restores default color
  when switching back to Solid from a gradient value
- No-op guard prevents re-emitting when clicking the already-active mode
- Reset button now says "Reset to default" when a default is available
- Text input placeholder shows the default value

Branding page:
- Accent Colors regrouped: Primary+hover and Danger+hover are stacked
  together, Success and Warning standalone in a 4-column grid
- Mini preview fallbacks now use getDefault() helper instead of
  hardcoded values, keeping them in sync with the defaults map

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/components/ColorPicker.svelte

@@ -35,7 +35,8 @@
 			color = v;
 		} else {
 			mode = 'color';
-			color = '#000000';
+			// Show the default color in the picker when no custom value is set
+			color = defaultValue && defaultValue.startsWith('#') ? defaultValue : '#000000';
 		}
 	});
 
@@ -50,15 +51,20 @@
 	}
 
 	function switchMode(newMode: 'color' | 'gradient') {
+		if (mode === newMode) return;
 		mode = newMode;
 		if (newMode === 'color') {
+			// Restore from default if available, not leftover gradient state
+			if (!value || value.startsWith('linear-gradient') || value.startsWith('radial-gradient')) {
+				color = defaultValue && defaultValue.startsWith('#') ? defaultValue : '#000000';
+			}
 			emitColor();
 		} else {
 			emitGradient();
 		}
 	}
 
-	function clear() {
+	function resetToDefault() {
 		value = '';
 		onchange?.('');
 	}
@@ -68,7 +74,9 @@
 	<div class="flex items-center justify-between">
 		<label class="block text-xs font-medium text-gray-600 dark:text-gray-400">{label}</label>
 		{#if value}
-			<button onclick={clear} class="text-[10px] text-gray-400 hover:text-gray-600 dark:hover:text-gray-300">Reset</button>
+			<button onclick={resetToDefault} class="text-[10px] text-gray-400 hover:text-gray-600 dark:hover:text-gray-300">
+				{defaultValue ? 'Reset to default' : 'Clear'}
+			</button>
 		{:else if defaultValue}
 			<span class="text-[10px] text-gray-400 dark:text-gray-500">Default</span>
 		{/if}
@@ -103,7 +111,7 @@
 				type="text"
 				bind:value={color}
 				oninput={emitColor}
-				placeholder="#000000"
+				placeholder={defaultValue || '#000000'}
 				class="flex-1 rounded border border-gray-300 dark:border-gray-600 dark:bg-gray-800 dark:text-gray-100 px-2 py-1 text-xs font-mono focus:border-[var(--color-primary)] focus:outline-none"
 			/>
 		</div>

src/routes/admin/branding/+page.svelte

@@ -358,7 +358,9 @@
 		<!-- Accent Colors -->
 		<section class="rounded-xl border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-900 p-5">
 			<h2 class="text-sm font-semibold text-gray-800 dark:text-gray-200 mb-4">Accent Colors</h2>
-			<div class="grid grid-cols-2 sm:grid-cols-3 gap-4">
+			<div class="grid grid-cols-2 sm:grid-cols-4 gap-4">
+				<!-- Primary group -->
+				<div class="space-y-3">
 					<ColorPicker
 						label="Primary"
 						value={getField('primary') || ''}
@@ -371,6 +373,9 @@
 						defaultValue={getDefault('primaryHover')}
 						onchange={(v) => setField('primaryHover', v)}
 					/>
+				</div>
+				<!-- Danger group -->
+				<div class="space-y-3">
 					<ColorPicker
 						label="Danger"
 						value={getField('danger') || ''}
@@ -383,12 +388,15 @@
 						defaultValue={getDefault('dangerHover')}
 						onchange={(v) => setField('dangerHover', v)}
 					/>
+				</div>
+				<!-- Success -->
 				<ColorPicker
 					label="Success"
 					value={getField('success') || ''}
 					defaultValue={getDefault('success')}
 					onchange={(v) => setField('success', v)}
 				/>
+				<!-- Warning -->
 				<ColorPicker
 					label="Warning"
 					value={getField('warning') || ''}
@@ -403,12 +411,12 @@
 			<h2 class="text-sm font-semibold text-gray-800 dark:text-gray-200 mb-4">Preview</h2>
 			<div
 				class="rounded-lg overflow-hidden border border-gray-200 dark:border-gray-600"
-				style="background: {getField('pageBg') || (activeTab === 'light' ? '#f9fafb' : '#030712')}; min-height: 200px;"
+				style="background: {getField('pageBg') || getDefault('pageBg')}; min-height: 200px;"
 			>
 				<!-- Mini nav -->
 				<div
 					class="h-8 flex items-center px-3"
-					style="background: {getField('navBg') || (activeTab === 'light' ? '#0079bf' : '#3b82f6')};"
+					style="background: {getField('navBg') || getDefault('navBg')};"
 				>
 					<span class="text-white text-xs font-bold">Pounce</span>
 					<div class="ml-auto flex gap-1">
@@ -421,13 +429,13 @@
 					{#each ['To Do', 'In Progress', 'Done'] as colTitle}
 						<div
 							class="w-28 rounded-lg p-2"
-							style="background: {getField('columnBg') || (activeTab === 'light' ? '#ebecf0' : '#1f2937')}; border: 1px solid {getField('columnBorder') || 'transparent'}; color: {getField('columnText') || 'inherit'}; opacity: {getField('columnOpacity') != null && getField('columnOpacity') !== '' ? getField('columnOpacity') : 1};"
+							style="background: {getField('columnBg') || getDefault('columnBg')}; border: 1px solid {getField('columnBorder') || getDefault('columnBorder')}; color: {getField('columnText') || getDefault('columnText')}; opacity: {getField('columnOpacity') != null && getField('columnOpacity') !== '' ? getField('columnOpacity') : 1};"
 						>
 							<div class="text-[10px] font-semibold mb-1.5" style="color: {getField('columnText') || (activeTab === 'light' ? '#374151' : '#d1d5db')};">{colTitle}</div>
 							{#each [1, 2] as _}
 								<div
 									class="mb-1 p-1.5 shadow-sm"
-									style="background: {getField('cardBg') || (activeTab === 'light' ? '#ffffff' : '#374151')}; border: 1px solid {getField('cardBorder') || (activeTab === 'light' ? '#e5e7eb' : '#4b5563')}; border-radius: {getField('cardRadius') || '0.5rem'}; opacity: {getField('cardOpacity') != null && getField('cardOpacity') !== '' ? getField('cardOpacity') : 1};"
+									style="background: {getField('cardBg') || getDefault('cardBg')}; border: 1px solid {getField('cardBorder') || getDefault('cardBorder')}; border-radius: {getField('cardRadius') || '0.5rem'}; opacity: {getField('cardOpacity') != null && getField('cardOpacity') !== '' ? getField('cardOpacity') : 1};"
 								>
 									<div class="h-1.5 rounded" style="background: {getField('cardText') || (activeTab === 'light' ? '#374151' : '#d1d5db')}; width: 60%; opacity: 0.5;"></div>
 								</div>
@@ -437,10 +445,10 @@
 				</div>
 				<!-- Mini button row -->
 				<div class="flex gap-2 px-3 pb-3">
-					<div class="rounded px-2 py-1 text-[10px] text-white" style="background: {getField('primary') || (activeTab === 'light' ? '#0079bf' : '#3b82f6')};">Primary</div>
-					<div class="rounded px-2 py-1 text-[10px] text-white" style="background: {getField('danger') || (activeTab === 'light' ? '#eb5a46' : '#ef4444')};">Danger</div>
-					<div class="rounded px-2 py-1 text-[10px] text-white" style="background: {getField('success') || (activeTab === 'light' ? '#61bd4f' : '#22c55e')};">Success</div>
-					<div class="rounded px-2 py-1 text-[10px] text-gray-800" style="background: {getField('warning') || (activeTab === 'light' ? '#f2d600' : '#eab308')};">Warning</div>
+					<div class="rounded px-2 py-1 text-[10px] text-white" style="background: {getField('primary') || getDefault('primary')};">Primary</div>
+					<div class="rounded px-2 py-1 text-[10px] text-white" style="background: {getField('danger') || getDefault('danger')};">Danger</div>
+					<div class="rounded px-2 py-1 text-[10px] text-white" style="background: {getField('success') || getDefault('success')};">Success</div>
+					<div class="rounded px-2 py-1 text-[10px] text-gray-800" style="background: {getField('warning') || getDefault('warning')};">Warning</div>
 				</div>
 			</div>
 		</section>