feat(app): add Settings view, configurable claude dir, and recap docs refactor

Introduce a Settings view for configuring the Claude data directory
  (with WSL auto-detection on Windows), sidebar project grouping module,
  and an empty-state onboarding screen for SessionList. Refactor
  recap-patterns.md into per-card reference files under references/recap/
  with separate retrieval and writing guides. Remove the legacy panel.html.
  On the data layer: incremental indexing via changedPaths, per-session
  live-update IPC (obelisk:session-updated), and session dirty-tracking
  in the renderer.

app/renderer/src/session-live.mjs

@@ -0,0 +1,31 @@
+export function createSessionLiveState() {
+  return {
+    dirtySessions: new Set(),
+  };
+}
+
+export const sessionLiveState = createSessionLiveState();
+
+export function noteSessionUpdated(live, sessionId, currentSessionId = null) {
+  if (!sessionId) return { reload: false, sessionId: null };
+  if (sessionId === currentSessionId) {
+    live.dirtySessions.delete(sessionId);
+    return { reload: true, sessionId };
+  }
+  live.dirtySessions.add(sessionId);
+  return { reload: false, sessionId };
+}
+
+export function clearSessionDirty(sessionId, live = sessionLiveState) {
+  if (sessionId) live.dirtySessions.delete(sessionId);
+}
+
+export function consumeSessionDirty(live, sessionId) {
+  if (!sessionId || !live.dirtySessions.has(sessionId)) return false;
+  live.dirtySessions.delete(sessionId);
+  return true;
+}
+
+export function consumeGlobalSessionDirty(sessionId) {
+  return consumeSessionDirty(sessionLiveState, sessionId);
+}