Implement persistent native A2UI chat surfaces

locales/ui/en.ftl

@@ -78,6 +78,23 @@ chat-role-tool = Tool
 chat-deleted = Conversation deleted
 chat-link-refused = This link type is not allowed
 chat-navigation-invalid = The requested blog item could not be opened
+chat-surface-dismiss = Dismiss
+chat-surface-empty = No content
+chat-surface-type-card = Card
+chat-surface-type-chart = Chart
+chat-surface-type-form = Form
+chat-surface-type-list = List
+chat-surface-type-metric = Metric
+chat-surface-type-mindmap = Mind map
+chat-surface-type-table = Table
+chat-surface-type-tabs = Tabs
+chat-surface-type-text = Text
+chat-surface-type-json = Data
+chat-surface-form-datePlaceholder = YYYY-MM-DD
+chat-surface-form-numberPlaceholder = Enter a number
+chat-surface-form-textPlaceholder = Enter a value
+chat-surface-form-submit = Submit
+chat-surface-actionRefused = Assistant action refused: { $reason }
 statusBar-chatTokens = AI ↑{ $input } ↓{ $output } cache { $cacheRead }/{ $cacheWrite }
 common-settings = Settings
 common-tasks = Tasks