fix whats-new text colors, add V4 backup/passphrase details, and add settings vault section to revisit changelog

@@ -7967,14 +7967,14 @@79677967   font-size: 20px;79687968   font-style: italic;79697969   font-weight: 400;7970-  color: var(--peach-t4);7970+  color: var(--peach-t0);79717971   margin: 0;79727972 }79737973 79747974 .peach-whats-new-version {79757975   font-family: var(--peach-mono);79767976   font-size: 0.6875rem;7977-  color: var(--peach-t2);7977+  color: var(--peach-t1);79787978 }79797979 79807980 .peach-whats-new-scroll {@@ -8014,7 +8014,7 @@80148014 .peach-whats-new-note-heading {80158015   font-size: 0.875rem;80168016   font-weight: 600;8017-  color: var(--peach-t4);8017+  color: var(--peach-t0);80188018   margin: 0 0 6px;80198019 }80208020 

@@ -5,8 +5,10 @@55 import { StackDeck } from "../components/settings/StackDeck";66 import type { CardId, StackBodies, StackCardSpec } from "../components/settings/types";77 import { RecoveryWordDisplayView } from "./RecoveryWordDisplay";8+import { WhatsNewView } from "./WhatsNew";89 import type { Canary } from "../../shared/types";910 import { ACCENT_COLORS } from "../../shared/types";11+import { PEACH_VERSION, hasReleaseNotes } from "../../shared/release-notes";1012 import type {1113   AccentColorName,1214   PasskeyProviderState,@@ -474,6 +476,7 @@474476   }475477 476478   const [showVaultAdvanced, setShowVaultAdvanced] = createSignal(false);479+  const [showWhatsNew, setShowWhatsNew] = createSignal(false);477480 478481   const [showChangePw, setShowChangePw] = createSignal(false);479482   const [changePwCurrent, setChangePwCurrent] = createSignal("");@@ -1476,6 +1479,16 @@14761479             </button>14771480           </div>14781481 1482+          <Show when={hasReleaseNotes()}>1483+            <p class="peach-settings-sub-label">WHAT'S NEW</p>1484+            <div class="peach-settings-row peach-settings-row--meta">1485+              <span>v{PEACH_VERSION}</span>1486+              <button class="peach-btn peach-btn--subtle peach-btn--sm" onClick={() => setShowWhatsNew(true)}>1487+                view1488+              </button>1489+            </div>1490+          </Show>1491+14791492           <span class="peach-settings-sub-label">VAULT HISTORY</span>14801493           <Show when={historyLoading()}>14811494             <p class="peach-settings-hint">Loading…</p>@@ -2385,6 +2398,9 @@23852398 23862399   return (23872400     <Show2401+      when={showWhatsNew()}2402+      fallback={2403+    <Show23882404       when={showNewRecoveryWords()}23892405       fallback={23902406         <div@@ -2407,6 +2423,10 @@24072423       }24082424     >24092425       <RecoveryWordDisplayView onDone={() => setShowNewRecoveryWords(false)} />2426+    </Show>2427+      }2428+    >2429+      <WhatsNewView onContinue={() => setShowWhatsNew(false)} />24102430     </Show>24112431   );24122432 }

@@ -27,7 +27,11 @@2727 export const CURRENT_NOTES: ReleaseNote[] = [2828   {2929     heading: "Vault V4 format",30-    body: "Peach now writes a new vault format that supports passwords up to 65,535 characters. Your existing vaults and exports are fully readable.",30+    body: "Peach now supports passphrases and passwords up to 256 characters. Your existing vaults and exports remain fully readable.",31+  },32+  {33+    heading: "Back up before updating",34+    body: "We recommend creating a vault backup before installing this update. Open Settings → Export to save an encrypted copy of your vault.",3135   },3236   {3337     heading: "Update your Android app",