Outline: share as a read-only link

- Share on the Outline page opens a sheet: create / copy / turn off a
  read-only link, share the link with the system share sheet, or send the
  outline as text
- The link has its own token (separate from the whole-study share link) and
  the public endpoint returns only the outlines, rebuilt field by field:
  no observations, interpretations, applications, scripts or word notes
- Opening the link shows the outline(s) with no sign-in, a switcher between
  the whole-study and per-chunk outlines, and Print / PDF
- New outline_share_token column (added automatically on start)

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

src/App.jsx

@@ -5,6 +5,7 @@ import { AppContext, useApp } from './context/AppContext.js';
 import { ToastProvider, useToast } from './components/Toasts.jsx';
 import CommandPalette from './components/CommandPalette.jsx';
 import ShortcutsHelp from './components/ShortcutsHelp.jsx';
+import SharedOutlineView from './components/SharedOutlineView.jsx';
 import { useAudio } from './hooks/useAudio.js';
 import { useAuth } from './hooks/useAuth.js';
 import { useBibleReader } from './hooks/useBibleReader.js';
@@ -149,7 +150,7 @@ const AppInner = () => {
     page: currentPage,
     setPage: setCurrentPage,
     hasProject: !!project,
-    enabled: !new URLSearchParams(window.location.search).has('share'),
+    enabled: !new URLSearchParams(window.location.search).has('share') && !new URLSearchParams(window.location.search).has('outline'),
     onArrive: (page) => { if (page === 'home') setProjectIndex(loadProjectIndex()); },
   });
 
@@ -461,6 +462,10 @@ function PageLoading() {
 function AppRouter() {
   const { currentPage, authUser, authServerDown } = useApp();
   const { token: sharedViewToken, project: sharedProject, error: sharedError } = useSharedView();
+  const sharedOutlineToken = new URLSearchParams(window.location.search).get('outline');
+
+  // A read-only outline link: no sign-in, nothing editable
+  if (sharedOutlineToken) return <SharedOutlineView token={sharedOutlineToken} />;
 
   if (sharedViewToken) {
     if (sharedError) {