feat(electron): main process, vault, search index, links, import, capture

Vault on plain .md files with FTS5 index, link rewriting, canvas files,
history/trash/backup, link previews, image fetch, tasks and unlinked
mentions, Notion/Obsidian importer, quick-capture window and shortcut.

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

electron/tasks.cjs

@@ -0,0 +1,55 @@
+'use strict';
+// Checklist items (`- [ ] text`) across the notes, and ticking one from outside its page.
+// A task is identified by its page and line number in the page's body (what vault.read returns), plus its text,
+// so a file that changed since the list was made is never edited blindly.
+
+const TASK = /^(\s*(?:>\s*)*[-*+]\s+)\[([ xX])\](\s+)(.*)$/;
+const DUE = /(?:📅|\bdue:|\[due::)\s*(\d{4}-\d{2}-\d{2})/;
+const TAG = /(?:^|\s)#([\p{L}\p{N}_/-]*[\p{L}_/-][\p{L}\p{N}_/-]*)/gu;
+
+// Line indexes inside ``` / ~~~ fences are not tasks.
+function* lines(body) {
+  let fence = null;
+  const all = String(body || '').split('\n');
+  for (let i = 0; i < all.length; i++) {
+    const f = all[i].match(/^\s*(```|~~~)/);
+    if (f) { fence = fence === f[1] ? null : fence || f[1]; continue; }
+    if (!fence) yield [i, all[i]];
+  }
+}
+
+// [{ id, title, icon, line, done, text, due, tags, depth }] for every task on every page (boards and canvases excluded:
+// a board's cards are its own thing).
+function findTasks(pages) {
+  const out = [];
+  for (const p of pages) {
+    if (!p.exists || p.kind === 'canvas' || /\.canvas$/i.test(p.id)) continue;
+    if (p.props && p.props['kanban-plugin']) continue;
+    for (const [line, text] of lines(p.body)) {
+      const m = text.match(TASK);
+      if (!m) continue;
+      const body = m[4].trim();
+      if (!body) continue;
+      const tags = new Set((p.tags || []).map(String));
+      for (const t of body.matchAll(TAG)) tags.add(t[1]);
+      const due = body.match(DUE);
+      out.push({
+        id: p.id, title: p.title, icon: p.icon || null, line,
+        done: m[2] !== ' ', text: body, due: due ? due[1] : '', tags: [...tags],
+        depth: Math.floor((m[1].match(/^\s*/)[0].replace(/\t/g, '  ').length) / 2)
+      });
+    }
+  }
+  return out;
+}
+
+// The body with the task at `line` ticked or unticked; null if the line is no longer that task.
+function setTask(body, line, text, done) {
+  const all = String(body || '').split('\n');
+  const m = all[line] && all[line].match(TASK);
+  if (!m || m[4].trim() !== String(text).trim()) return null;
+  all[line] = m[1] + (done ? '[x]' : '[ ]') + m[3] + m[4];
+  return all.join('\n');
+}
+
+module.exports = { findTasks, setTask };