feat(reminders): register module; init + startup reconcile (T8.6, FR-CAL-5)

Reschedules anything Windows' own toast schedule lost track of
(uninstall/reinstall, a changed AppUserModelID) — safe to run every
startup since schedule() is idempotent (cancels any existing entry for
the same action item id first).

src-tauri/src/lib.rs

@@ -16,6 +16,7 @@ pub mod mcp;
 pub mod models;
 pub mod notes;
 pub mod paths;
+pub mod reminders;
 pub mod storage;
 pub mod sync;
 pub mod transcription;
@@ -94,9 +95,14 @@ pub fn run() {
                 .build(app)?;
             app.manage(TrayHandle(tray));
 
-            // Startup recovery + retention pass (FR-REL-1, FR-STORE-2). Spawned so
-            // it never blocks the window from showing (NFR-PERF-4); nothing here
-            // repeats on a timer (NFR-RES-1).
+            // Reminders (Phase 8, T8.6, FR-CAL-5) are Windows-scheduled toasts, not
+            // an app-side timer — Windows itself is what's "polling", so this stays
+            // within NFR-RES-1. init() just registers the AppUserModelID.
+            reminders::init();
+
+            // Startup recovery + retention + reminder-reconcile pass (FR-REL-1,
+            // FR-STORE-2, FR-CAL-5). Spawned so it never blocks the window from
+            // showing (NFR-PERF-4); nothing here repeats on a timer (NFR-RES-1).
             let store = store_for_setup;
             tauri::async_runtime::spawn(async move {
                 match store.recover_scan().await {
@@ -114,6 +120,20 @@ pub fn run() {
                 if let Err(e) = store.enforce_retention(policy).await {
                     tracing::error!("startup retention enforcement failed: {e}");
                 }
+                // Re-schedules anything Windows' own toast schedule lost track of
+                // (uninstall/reinstall, a changed AppUserModelID, …) — schedule()
+                // itself is idempotent (cancels any existing entry for the same
+                // action item id first), so this is safe to run every startup.
+                match store.list_pending_reminders().await {
+                    Ok(pending) => {
+                        for item in &pending {
+                            if let (Some(id), Some(due_at)) = (&item.id, item.due_at) {
+                                reminders::schedule(id, &item.text, item.owner.as_deref(), due_at);
+                            }
+                        }
+                    }
+                    Err(e) => tracing::error!("startup reminder reconcile failed: {e}"),
+                }
             });
             Ok(())
         })