fix(web): full-height plugin config form and full-width plugin card descriptions (#573)

* fix(web): let the plugin config form use the full page height

The form wrapper has carried `max-h-96 overflow-y-auto` since #145, but
the class was a no-op until #568 defined `.max-h-96` in app.css. That
silently capped the whole config form at 24rem with a nested scrollbar.
Drop the cap so the form flows naturally and the page scrolls.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(web): give installed plugin card descriptions the full card width

The enable/disable toggle was a flex sibling of the whole text column
(name, metadata, description), so it reserved its width for the full
height of the card body. Descriptions wrapped into a narrow strip,
leaving blank space under the toggle and making cards very tall.

Move the toggle into a header row with just the name and badges, and
render the metadata and description below at full width.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

web_interface/templates/v3/partials/plugin_config.html

@@ -1266,7 +1266,7 @@
             <div class="bg-gray-50 rounded-lg p-4">
                 <h3 class="text-md font-medium text-gray-900 mb-3">Configuration</h3>
                 {{ ui.settings_filter("Filter this plugin's settings…") }}
-                <div class="space-y-4 max-h-96 overflow-y-auto pr-2">
+                <div class="space-y-4">
                     {% if schema and schema.properties %}
                         {# Use property order if defined, otherwise use natural order #}
                         {# Skip 'enabled' field - it's handled by the header toggle #}