feat(workspace): sliding sidebar in focus mode, calmer workspace bar, smoother journal

- focus mode: folders slide in from the left (button, title click, or the
  left edge on wide screens); picking a note keeps focus mode
- workspace bar: borderless live/shared/save pills in one style, divider
  before the note actions; footer without top line
- journal panel and calendar open with an animation, the view fades in
- paste and markdown import nest a list under the paragraph introducing it

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/features/workspace/JournalView.tsx

@@ -143,7 +143,7 @@ export const JournalView: React.FC<JournalViewProps> = ({
   const sharedCount = activeDoc?.sharedWith?.length ?? 0;
 
   return (
-    <div className="flex-1 flex flex-col min-h-0 bg-editor">
+    <div className="flex-1 flex flex-col min-h-0 bg-editor view-enter">
       {/* One header for all days: the day in view and its sharing */}
       <div className="shrink-0 flex items-center gap-2 px-4 sm:px-6 py-2 border-b border-border">
         <button