R7 custom emoji in decePub: the server's own, administered, picked, suggested and shown

Administration has a Custom emoji section (EmojiPanel, data-admin-section=emoji): the server's emoji by category, added
with a picture streamed from the file, changed (category, picker, disabled, picture; never the shortcode) and deleted,
asked first, with PrivaPub's 409 and 422 in the dialog. EmojiService reads /clientapi/admin/emoji and, for everyone,
/api/v1/custom_emojis, kept a day in localStorage (CustomEmojiCache) and read again after a change here. EmojiPicker
(a DDropdown sheet on a phone, rendered only while open) offers them by category with common unicode emoji, searchable:
the composer writes the choice at the caret, a card and the announcements banner react with it. The composer suggests
custom emoji after `:` and two letters. Custom reactions toggle as :shortcode: and show their picture, notifications of
one too; located posts, announcements and NavMenu's persona names render the server's emoji.

Verified: Release build, 0 errors (the 3 warnings were there before). Not run against PrivaPub or in the pasture.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WpVCoDeM1qUTRp4fXQdfof

Components/Daisy/Actions/DDropdown.razor

@@ -8,8 +8,8 @@
    which also scrolls a menu cut off by its scroller into view; Escape or an outside click gives it back to the trigger.
    SheetOnNarrow makes the content a sheet rising from the bottom of a phone's screen (below md), over a dimmed page. *@
 <div @attributes="AdditionalAttributes" class="@CssClass" @onkeydown="OnKeyDown">
-	<div @ref="trigger" role="button" tabindex="0" class="@TriggerClass" aria-haspopup="true" aria-expanded="@(IsOpen ? "true" : "false")"
-		 @onclick="Toggle">
+	<div @attributes="TriggerAttributes" @ref="trigger" role="button" tabindex="0" class="@TriggerClass" aria-haspopup="true"
+		 aria-expanded="@(IsOpen ? "true" : "false")" @onclick="Toggle">
 		@Trigger
 	</div>
 	@if (IsOpen)
@@ -35,6 +35,8 @@
 	/// <summary>Close after any click inside the content, e.g. on a menu item.</summary>
 	[Parameter] public bool CloseOnContentClick { get; set; }
 	[Parameter] public string TriggerClass { get; set; }
+	/// <summary>Attributes of the trigger itself (an aria-label, a data- hook); the outer element takes the unmatched ones.</summary>
+	[Parameter] public IReadOnlyDictionary<string, object> TriggerAttributes { get; set; }
 	[Parameter] public string ContentClass { get; set; }
 	/// <summary>Below md, the content is a sheet at the bottom of the screen instead of hanging from the trigger.</summary>
 	[Parameter] public bool SheetOnNarrow { get; set; }