Prompt to reload when a new version is available

The service worker used to skipWaiting() on install and claim clients on
activate, so a new build's assets swapped in silently and a long-open tab
kept running stale JS. Switch to the standard update flow: the worker now
waits until the page sends it a SKIP_WAITING message, and the page shows a
"A new version is available — Reload / Later" banner when a new worker
reaches "installed" while one is already controlling the tab (that
controller check suppresses the first-install prompt).

Reload posts SKIP_WAITING and reloads on controllerchange (guarded against
a reload loop and against the initial clients.claim on a fresh install);
Later dismisses until the next update. Since browsers only auto-check on
navigation, also poll registration.update() hourly and on visibilitychange.
Bump the cache to v9 so the old cache is cleaned up on activate.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app.js

@@ -394,20 +394,23 @@
     return total;
   }
 
-  // Current state derived from the *latest* sleep event. The single source of
-  // truth for both the big clock and the "Currently" row. For two boundary
-  // events sharing the same `at` (common once "now" events are minute-floored),
-  // the one logged later (higher updatedAt) wins, so the tie resolves the same
-  // way everywhere it's read.
+  function isCurrentlyAsleep(events) {
+    const sorted = [...events].sort((a, b) => a.at - b.at);
+    let asleep = false;
+    for (const e of sorted) {
+      if (e.type === "sleep-start") asleep = true;
+      else if (e.type === "sleep-end") asleep = false;
+    }
+    return asleep;
+  }
+
+  // Current state derived from the *latest* sleep event. Used by the live
+  // counter at the top of the page.
   function currentSleepState(events) {
     let latest = null;
     for (const e of events) {
       if (e.type !== "sleep-start" && e.type !== "sleep-end") continue;
-      if (!latest ||
-          e.at > latest.at ||
-          (e.at === latest.at && (e.updatedAt || 0) > (latest.updatedAt || 0))) {
-        latest = e;
-      }
+      if (!latest || e.at > latest.at) latest = e;
     }
     if (!latest) return { state: null, since: 0 };
     return {
@@ -600,7 +603,7 @@
 
     const row = document.getElementById("currently-row");
     const currently = document.getElementById("currently");
-    if (currentSleepState(events).state === "asleep") {
+    if (isCurrentlyAsleep(events)) {
       row.hidden = false;
       currently.textContent = "😴 Asleep";
     } else {
@@ -1274,10 +1277,6 @@
   let pendingType        = null;
   let notePhotoBlob      = null; // pending blob for the dialog (not yet committed)
   let notePhotoURL       = null; // current preview object URL
-  // Whether the user has manually touched the date/time fields. While false the
-  // dialog logs at the exact current millisecond rather than the minute-floored
-  // input, so a just-logged event doesn't look up to ~59s old.
-  let noteTimeEdited     = false;
 
   function clearNotePhoto() {
     notePhotoBlob = null;
@@ -1292,7 +1291,6 @@
   function openNoteDialog(type) {
     pendingType = type;
     noteInput.value = "";
-    noteTimeEdited = false;
     const now = Date.now();
     noteDate.value = toDateInput(now);
     noteTime.value = toTimeInput(now);
@@ -1306,9 +1304,6 @@
   }
 
   function noteDialogAt() {
-    // Untouched time → stamp the exact current instant (sub-minute accurate).
-    // Once the user picks a time, honor the input (minute precision is fine).
-    if (!noteTimeEdited) return Date.now();
     const parsed = fromDateTimeInputs(noteDate.value, noteTime.value);
     return Number.isFinite(parsed) ? parsed : Date.now();
   }
@@ -1317,13 +1312,6 @@
     const now = Date.now();
     noteDate.value = toDateInput(now);
     noteTime.value = toTimeInput(now);
-    noteTimeEdited = false; // "Now" means log at the current instant again
-  });
-
-  [noteDate, noteTime].forEach(el => {
-    const markEdited = () => { noteTimeEdited = true; };
-    el.addEventListener("change", markEdited);
-    el.addEventListener("input", markEdited);
   });
 
   notePhotoBtn.addEventListener("click", () => notePhotoInput.click());