feat: ship v0.3.0 with P2.1 editor polish and P3 AI collaboration

Add chapter reorder, search replace, inspiration capture, and AI chat with context editing, settings, offline handling, and naming checks. Fix dev black screen by keeping process.env reads in the main process only.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/renderer/components/reference/ReferencePanel.tsx

@@ -7,11 +7,13 @@ import { useEditStore } from '@renderer/stores/useEditStore'
 export function ReferencePanel(): React.JSX.Element {
   const { t } = useTranslation()
   const open = useReferenceStore((s) => s.open)
+  const pinned = useReferenceStore((s) => s.pinned)
   const tab = useReferenceStore((s) => s.tab)
   const query = useReferenceStore((s) => s.query)
   const setTab = useReferenceStore((s) => s.setTab)
   const setQuery = useReferenceStore((s) => s.setQuery)
   const setOpen = useReferenceStore((s) => s.setOpen)
+  const setPinned = useReferenceStore((s) => s.setPinned)
   const switchTarget = useEditStore((s) => s.switchTarget)
   const outlines = useBookStore((s) => s.outlines)
   const settings = useBookStore((s) => s.settings)
@@ -43,9 +45,28 @@ export function ReferencePanel(): React.JSX.Element {
     <div id="reference-panel" className="open" data-testid="reference-panel">
       <div className="ref-header">
         <span>{t('reference.title')}</span>
-        <button type="button" className="btn" onClick={() => setOpen(false)}>
-          ✕
-        </button>
+        <div className="ref-header-actions">
+          <button
+            type="button"
+            className={`btn ref-pin-btn ${pinned ? 'active' : ''}`}
+            data-testid="reference-pin"
+            title={pinned ? t('reference.unpin') : t('reference.pin')}
+            onClick={() => setPinned(!pinned)}
+          >
+            📌
+          </button>
+          <button
+            type="button"
+            className="btn"
+            data-testid="reference-close"
+            onClick={() => {
+              if (pinned) setPinned(false)
+              else setOpen(false)
+            }}
+          >
+            {pinned ? t('reference.unpin') : '✕'}
+          </button>
+        </div>
       </div>
       <input
         className="form-control form-control--wide"