fix(ui): WAM-loaded CSS, per-destination keep-local, tidy destination modal

- Move component admin CSS to the Joomla Web Asset Manager: new
  media/com_mokosuitebackup/css/admin.css + media/joomla.asset.json, a <media>
  entry in the manifest, and useStyle('com_mokosuitebackup.admin') in the
  profile edit view. Removes the inline <style> block (no more inline CSS).
- Remove the profile-level "Keep local copy" field/"Remote" fieldset from
  forms/profile.xml — it is now per remote destination (modal remoteKeepLocal).
- Clean up the Add/Edit Destination modal padding/margins (in admin.css).

Claude-Session: https://claude.ai/code/session_01WbGBN9VyRK61zczYWcCQ2i

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+### Changed
+- Component admin CSS now loads via the Joomla **Web Asset Manager** (`media/com_mokosuitebackup/` + `joomla.asset.json`) instead of an inline `<style>` block.
+- "Keep local copy" is configured **per remote destination** (in the Add/Edit Destination modal); the redundant profile-level field and its "Remote" tab are removed.
+- Add/Edit Destination modal: cleaned up the cramped padding/margins.
+
 ### Fixed
 - Admin menu / duplicate-component fallout: (a) the orphaned `com_component-mokosuitebackup` is now removed in **preflight** too, so its "Backup" menu no longer collides on install ("The alias backup is already being used"); (b) `ensureSubmenuItems()` **recreates the top-level "Backup" menu** if it was deleted, instead of giving up — so Backup no longer disappears from the admin menu (and the cPanel module / MokoSuiteClient can find it again); (c) the component menu label now uses the short constant `COM_MOKOJOOMBACKUP_SHORT`. (#213 fallout)
 - Installer no longer aborts on MySQL 8 with "This command is not supported in the prepared statement protocol yet" (error 1295). The legacy remote-column purge migration (`02.56.01.sql`) used `PREPARE`/`EXECUTE`/`DEALLOCATE`, which Joomla's installer rejects; the drop now runs in the package installer script via an INFORMATION_SCHEMA-gated plain `ALTER` (portable across MariaDB and MySQL 8). (#213 update path)

source/packages/com_mokosuitebackup/forms/profile.xml

@@ -205,19 +205,9 @@
 		/>
 	</fieldset>
 
-	<fieldset name="remote" label="COM_MOKOJOOMBACKUP_FIELDSET_REMOTE">
-		<field
-			name="remote_keep_local"
-			type="radio"
-			label="COM_MOKOJOOMBACKUP_FIELD_KEEP_LOCAL"
-			description="COM_MOKOJOOMBACKUP_FIELD_KEEP_LOCAL_DESC"
-			default="1"
-			class="btn-group"
-		>
-			<option value="1">JYES</option>
-			<option value="0">JNO</option>
-		</field>
-	</fieldset>
+	<!-- The "Keep local copy" setting is now configured per remote destination
+	     (in the Add/Edit Destination modal), so the profile-level field and its
+	     "Remote" tab have been removed. -->
 
 	<fieldset name="retention" label="COM_MOKOJOOMBACKUP_FIELDSET_RETENTION">
 		<field

source/packages/com_mokosuitebackup/media/css/admin.css

@@ -0,0 +1,31 @@
+/**
+ * MokoSuiteBackup — admin styles (loaded via the Joomla Web Asset Manager).
+ */
+
+/* Add/Edit Destination modal — comfortable, consistent spacing */
+#remoteModal .modal-header,
+#remoteModal .modal-footer {
+	padding: 1rem 1.75rem;
+}
+
+#remoteModal .modal-body {
+	padding: 1.5rem 1.75rem;
+}
+
+#remoteModal .modal-body .row + .row,
+#remoteModal .remote-type-fields {
+	margin-top: 0.25rem;
+}
+
+#remoteModal hr {
+	margin: 1.5rem 0;
+	opacity: 0.12;
+}
+
+#remoteModal .form-label {
+	margin-bottom: 0.35rem;
+}
+
+#remoteModal .form-check.form-switch {
+	padding-top: 0.15rem;
+}

source/packages/com_mokosuitebackup/media/joomla.asset.json

@@ -0,0 +1,14 @@
+{
+	"$schema": "https://developer.joomla.org/schemas/json-schema/web_assets.json",
+	"name": "com_mokosuitebackup",
+	"version": "1.0.0",
+	"description": "MokoSuiteBackup web assets",
+	"license": "GPL-3.0-or-later",
+	"assets": [
+		{
+			"name": "com_mokosuitebackup.admin",
+			"type": "style",
+			"uri": "com_mokosuitebackup/css/admin.css"
+		}
+	]
+}

source/packages/com_mokosuitebackup/mokosuitebackup.xml

@@ -78,6 +78,11 @@
 		</languages>
 	</administration>
 
+	<media destination="com_mokosuitebackup" folder="media">
+		<folder>css</folder>
+		<filename>joomla.asset.json</filename>
+	</media>
+
 	<api>
 		<files folder="api">
 			<folder>src</folder>

source/packages/com_mokosuitebackup/tmpl/profile/edit.php

@@ -19,6 +19,9 @@ HTMLHelper::_('behavior.formvalidator');
 HTMLHelper::_('behavior.keepalive');
 HTMLHelper::_('bootstrap.modal');
 
+/* Component CSS via the Web Asset Manager (declared in media/joomla.asset.json) */
+$this->getDocument()->getWebAssetManager()->useStyle('com_mokosuitebackup.admin');
+
 $profileId = (int) $this->item->id;
 $token     = Session::getFormToken();
 ?>