feat: add EmojiPickerButton and replace plain-text emoji inputs

Create a reusable EmojiPickerButton component that wraps EmojiPicker
in a compact dropdown toggle. Replace the plain <input type="text">
emoji fields in quick action icons (EditCollectionModal) and role
icons (roles page) with the new picker for a consistent UX.

web/src/lib/components/collections/EditCollectionModal.svelte

@@ -3,6 +3,7 @@
 	import type { Collection, CollectionUpdate, CollectionSettings, FieldDef, FieldMigration, QuickAction } from '$lib/types';
 	import { parseSchema, parseSettings } from '$lib/types';
 	import EmojiPicker from '$lib/components/common/EmojiPicker.svelte';
+	import EmojiPickerButton from '$lib/components/common/EmojiPickerButton.svelte';
 	import { toastStore } from '$lib/stores/toast.svelte';
 
 	interface Props {
@@ -602,14 +603,7 @@
 								{#each itemActions as { action, index } (index)}
 									<div class="action-card">
 										<div class="action-card-top">
-											<input
-												class="action-icon-input"
-												type="text"
-												placeholder="⚡"
-												bind:value={action.icon}
-												maxlength="2"
-												title="Icon (emoji)"
-											/>
+											<EmojiPickerButton bind:value={action.icon} placeholder="⚡" />
 											<input
 												class="action-label-input"
 												type="text"
@@ -644,14 +638,7 @@
 								{#each collectionActions as { action, index } (index)}
 									<div class="action-card">
 										<div class="action-card-top">
-											<input
-												class="action-icon-input"
-												type="text"
-												placeholder="⚡"
-												bind:value={action.icon}
-												maxlength="2"
-												title="Icon (emoji)"
-											/>
+											<EmojiPickerButton bind:value={action.icon} placeholder="⚡" />
 											<input
 												class="action-label-input"
 												type="text"

web/src/lib/components/common/EmojiPickerButton.svelte

@@ -0,0 +1,90 @@
+<script lang="ts">
+	import EmojiPicker from '$lib/components/common/EmojiPicker.svelte';
+
+	interface Props {
+		value: string;
+		placeholder?: string;
+		size?: 'sm' | 'md';
+	}
+
+	let { value = $bindable(), placeholder = '⚡', size = 'sm' }: Props = $props();
+
+	let open = $state(false);
+
+	function handleWindowClick(e: MouseEvent) {
+		if (open && !(e.target as HTMLElement)?.closest('.emoji-picker-button')) {
+			open = false;
+		}
+	}
+
+	function handleSelect(emoji: string) {
+		value = emoji;
+		open = false;
+	}
+</script>
+
+<svelte:window onclick={handleWindowClick} />
+
+<div class="emoji-picker-button" class:size-md={size === 'md'}>
+	<button
+		type="button"
+		class="trigger"
+		class:open
+		class:empty={!value}
+		onclick={() => (open = !open)}
+	>
+		{value || placeholder}
+	</button>
+
+	{#if open}
+		<div class="dropdown">
+			<EmojiPicker selected={value} onselect={handleSelect} />
+		</div>
+	{/if}
+</div>
+
+<style>
+	.emoji-picker-button {
+		position: relative;
+		display: inline-flex;
+	}
+
+	.trigger {
+		width: 36px;
+		height: 36px;
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		background: var(--bg-secondary);
+		border: 1px solid var(--border);
+		border-radius: var(--radius-sm);
+		cursor: pointer;
+		font-size: 1.1em;
+		line-height: 1;
+		padding: 0;
+	}
+
+	.size-md .trigger {
+		width: 42px;
+		height: 42px;
+	}
+
+	.trigger:hover {
+		border-color: var(--text-muted);
+	}
+
+	.trigger.open {
+		border-color: var(--accent-blue);
+	}
+
+	.trigger.empty {
+		color: var(--text-muted);
+	}
+
+	.dropdown {
+		position: absolute;
+		z-index: 50;
+		top: calc(100% + 4px);
+		left: 0;
+	}
+</style>

web/src/routes/[workspace]/roles/+page.svelte

@@ -8,6 +8,7 @@
 	import { itemUrlId } from '$lib/types';
 	import type { Item, Collection, RoleBoardLane, AgentRole } from '$lib/types';
 	import ItemCard from '$lib/components/collections/ItemCard.svelte';
+	import EmojiPickerButton from '$lib/components/common/EmojiPickerButton.svelte';
 	import { dndzone, TRIGGERS, SHADOW_ITEM_MARKER_PROPERTY_NAME } from 'svelte-dnd-action';
 	import type { DndEvent } from 'svelte-dnd-action';
 
@@ -449,7 +450,7 @@
 				<div class="role-field-group">
 					<label class="role-field-label">Icon & Name</label>
 					<div class="role-edit-row">
-						<input class="role-input role-input-icon" type="text" bind:value={editIcon} placeholder="🔨" />
+						<EmojiPickerButton bind:value={editIcon} placeholder="🔨" size="md" />
 						<input class="role-input" type="text" bind:value={editName} placeholder="Role name" />
 					</div>
 				</div>