fix(workspace): single scroll area, drag cleanup, thin note titles with bundled Inter

- the workspace fills the window; only the note scrolls (also on phones, where the
  sideways scroll area used to scroll on its own)
- clear drag state on dragend, calmer sidebar toggle when collapsed
- ship Inter as variable font, light and larger note titles; header shows the
  title only after the big title scrolled away and stays one row on phones
- main builds show the package version without -dev

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

frontend/src/App.tsx

@@ -750,7 +750,11 @@ export const App: React.FC = () => {
   };
 
   return (
-    <div className="min-h-screen bg-canvas text-main flex flex-col font-sans selection:bg-accent/30">
+    <div
+      className={`bg-canvas text-main flex flex-col font-sans selection:bg-accent/30 ${
+        activeTab === 'workspace' ? 'h-[100dvh] overflow-hidden' : 'min-h-screen'
+      }`}
+    >
       {/* Top Header Bar: Floating on mobile, solid panel on desktop */}
       <header className="sticky top-0 z-30 bg-canvas/85 backdrop-blur-md sm:bg-panel sm:border-b sm:border-border sm:shadow-sm">
         {/* Mobile Header: Floating Bar with Logo Action Dropdown Left & Profile Avatar Right */}
@@ -1113,9 +1117,14 @@ export const App: React.FC = () => {
       )}
 
       {/* Main Container */}
-      <main className="flex-1 max-w-6xl w-full mx-auto px-3 sm:px-4 pt-3 pb-24 sm:pb-6">
+      {/* The workspace fills the window exactly and scrolls only inside the note, never the page */}
+      <main
+        className={`flex-1 max-w-6xl w-full mx-auto px-3 sm:px-4 pt-3 pb-24 sm:pb-6 ${
+          activeTab === 'workspace' ? 'min-h-0 flex flex-col' : ''
+        }`}
+      >
         <ViewErrorBoundary onReset={() => setActiveTab('triage')}>
-          <section key={dataEpoch}>
+          <section key={dataEpoch} className={activeTab === 'workspace' ? 'flex-1 min-h-0 flex flex-col' : undefined}>
             {activeTab === 'triage' && (
               <TriageDeck
                 deck={deck}