app/src/components/notes/NoteEditor.tsx

@@ -30,15 +30,22 @@ export default function NoteEditor({
 }: Props) {
   return (
     <div className="flex flex-col h-full min-h-0 gap-2 p-3">
-      <div className="flex items-center gap-2">
+      {/* Wraps rather than overflows. The two buttons are a group with a fixed
+          appetite (~190px) and the title field can shrink only so far, so in a
+          narrow dock the title takes the first row and the buttons the second.
+          Without the wrap the group is simply clipped by the dock's
+          `overflow-hidden`, which puts Delete off-window with no scrollbar to
+          reach it. */}
+      <div className="flex flex-wrap items-center gap-2">
         <input
           value={title}
           onChange={(e) => onTitleChange(e.target.value)}
           onBlur={onCommit}
           placeholder="Note title"
           aria-label="Note title"
-          className="flex-1 min-w-0 px-2 h-8 bg-[var(--bg-primary)] border border-[var(--border-color)] rounded-[var(--radius-control)] text-[13px] text-[var(--text-primary)] focus:border-[var(--accent)] transition-colors"
+          className="flex-1 min-w-24 px-2 h-8 bg-[var(--bg-primary)] border border-[var(--border-color)] rounded-[var(--radius-control)] text-[13px] text-[var(--text-primary)] focus:border-[var(--accent)] transition-colors"
         />
+        <div className="flex items-center gap-2 flex-shrink-0">
           {/* The live editor text, not `note.body` — what is on screen is what
               gets sent. */}
           <SendToAgentButton projectId={projectId} body={body} />
@@ -46,6 +53,7 @@ export default function NoteEditor({
             Delete
           </Button>
         </div>
+      </div>
       <textarea
         value={body}
         onChange={(e) => onBodyChange(e.target.value)}

app/src/components/notes/NotesPanel.tsx

@@ -14,9 +14,21 @@ const UNTITLED = "Untitled note";
  * The notes surface itself, shared by the Project Home tab and the dock so the
  * two cannot drift into different behaviour.
  *
- * Master/detail: titles on the left, one editor on the right. The editor holds
- * draft text locally and commits on blur, which is how every other editable
- * field in the app behaves (`ClaudeInstructionsEditor`, the Config tab).
+ * Master/detail: titles beside the editor when there is room, stacked above it
+ * when there is not. That is a **container** query, not a viewport one, because
+ * the two surfaces differ in width while sharing a viewport — the dock opens at
+ * 352px and the tab is the width of the main area. A `md:` breakpoint would
+ * read the window and give both the same answer, which is the wrong answer for
+ * one of them.
+ *
+ * The threshold is arithmetic, not taste: side by side needs the 192px list,
+ * plus an editor wide enough for its own action row (~280px), plus the divider.
+ * Below ~473px the editor is narrower than its buttons, so `@lg` (512px) is the
+ * first stop that clears it.
+ *
+ * The editor holds draft text locally and commits on blur, which is how every
+ * other editable field in the app behaves (`ClaudeInstructionsEditor`, the
+ * Config tab).
  */
 export default function NotesPanel({ projectId }: Props) {
   const { notes, loading, saveState, createNote, saveNote, deleteNote } =
@@ -83,7 +95,7 @@ export default function NotesPanel({ projectId }: Props) {
   }
 
   return (
-    <div className="flex flex-col h-full min-h-0">
+    <div className="@container flex flex-col h-full min-h-0">
       <div className="flex items-center justify-between gap-2 px-3 py-2 border-b border-[var(--border-color)]">
         <Button variant="primary" onClick={onCreate}>
           New note
@@ -99,8 +111,11 @@ export default function NotesPanel({ projectId }: Props) {
           </p>
         </div>
       ) : (
-        <div className="flex-1 min-h-0 flex">
-          <ul className="w-48 flex-shrink-0 overflow-y-auto border-r border-[var(--border-color)] py-1">
+        <div className="flex-1 min-h-0 flex flex-col @lg:flex-row">
+          {/* Stacked: a capped strip of titles above the editor, so the note
+              being written keeps most of the height. Side by side: a full-height
+              column of the fixed width the editor's arithmetic assumes. */}
+          <ul className="flex-shrink-0 overflow-y-auto py-1 max-h-32 border-b @lg:max-h-none @lg:w-48 @lg:border-b-0 @lg:border-r border-[var(--border-color)]">
             {notes.map((n) => (
               <li key={n.id}>
                 <button