feat: write 3 files per solo recording (index + transkript + zusammenfassung)

- pipeline: call write_solo_docs() instead of save_transcript(); broadcast paths dict
- router: /open accepts paths list for Obsidian mode, copies all 3 files to vault
- app.js: store _modalPaths from saved event; Obsidian button sends all paths
- tests: test_write_solo_docs_creates_three_files added

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/app.js

@@ -13,6 +13,7 @@ const modalFolderBtn = document.getElementById('modal-folder-btn');
 const modalOpenBtn = document.getElementById('modal-open-btn');
 const modalCloseBtn = document.getElementById('modal-close-btn');
 let _modalPath = null;
+let _modalPaths = null;
 let _modalFilename = null;
 
 const speakerCard = document.getElementById('speaker-card');
@@ -53,8 +54,9 @@ logoutBtn.addEventListener('click', () => {
   });
 });
 
-function openModal(filename, path) {
+function openModal(filename, path, paths) {
   _modalPath = path;
+  _modalPaths = paths || null;
   _modalFilename = filename;
   modalTitle.textContent = filename.replace(/\.md$/, '').replace(/^\d{4}-\d{2}-\d{2}-\d{4}-/, '');
   modalBody.innerHTML = '';
@@ -69,6 +71,7 @@ function openModal(filename, path) {
 function closeModal() {
   modal.classList.add('hidden');
   _modalPath = null;
+  _modalPaths = null;
   _modalFilename = null;
 }
 
@@ -76,7 +79,11 @@ modalCloseBtn.addEventListener('click', closeModal);
 modal.querySelector('.modal-backdrop').addEventListener('click', closeModal);
 document.addEventListener('keydown', e => { if (e.key === 'Escape') closeModal(); });
 modalObsidianBtn.addEventListener('click', () => {
-  if (_modalPath) apiFetch('/open', { method: 'POST', body: JSON.stringify({ path: _modalPath, mode: 'obsidian' }) });
+  if (_modalPaths) {
+    apiFetch('/open', { method: 'POST', body: JSON.stringify({ paths: Object.values(_modalPaths), mode: 'obsidian' }) });
+  } else if (_modalPath) {
+    apiFetch('/open', { method: 'POST', body: JSON.stringify({ path: _modalPath, mode: 'obsidian' }) });
+  }
 });
 modalFolderBtn.addEventListener('click', () => {
   if (_modalPath) apiFetch('/open', { method: 'POST', body: JSON.stringify({ path: _modalPath, mode: 'folder' }) });