diff --git a/frontend/src/components/BaseModal.vue b/frontend/src/components/BaseModal.vue
index e5fe31d..ad7aff6 100644
--- a/frontend/src/components/BaseModal.vue
+++ b/frontend/src/components/BaseModal.vue
@@ -2,8 +2,8 @@
 // The backdrop + centered dialog panel every modal shares: a fixed dimmed overlay and
 // a bordered, rounded panel with role="dialog". Emits `close` on Escape and on a
 // backdrop pointer-down (mousedown outside the panel). The caller sizes/shadows/pads
-// the panel via `panelClass` and fills it (its own header + content) through the
-// default slot.
+// the panel via `panelClass` and fills it through the default slot; `title` adds the
+// heading row with a close button that a titled dialog wants.
 //
 // Owns the dialog's focus contract on behalf of all four callers: focus moves in on
 // open, Tab is trapped inside, and focus returns to the opener on close. Doing it
@@ -13,6 +13,7 @@
 // NoteEditor deliberately does NOT use this — its backdrop mousedown is drag-guarded and
 // its Escape/⌘-Enter handling is bespoke (unsaved-edit safety), so it keeps its own shell.
 import { onBeforeUnmount, onMounted, ref } from "vue";
+import Icon from "./Icon.vue";
 
 withDefaults(
   defineProps<{
@@ -22,6 +23,8 @@ withDefaults(
     align?: "start" | "center";
     /** aria-label for the panel when it has no visible heading (e.g. the command palette). */
     ariaLabel?: string;
+    /** A heading row with a close button, for a dialog that has a title. */
+    title?: string;
   }>(),
   { panelClass: "w-full max-w-sm shadow-xl", align: "start" },
 );
@@ -109,6 +112,13 @@ onBeforeUnmount(() => restoreTo?.focus?.());
       @keydown.esc="emit('close')"
       @keydown.tab="onTab"
     >
+      <div
+        v-if="title"
+        class="flex items-center justify-between border-b border-neutral-100 px-4 py-3 dark:border-neutral-800"
+      >
+        <h2 class="text-sm font-semibold">{{ title }}</h2>
+        <button type="button" class="icon-btn" aria-label="Close" @click="emit('close')"><Icon name="close" /></button>
+      </div>
       <slot />
     </div>
   </div>
diff --git a/frontend/src/components/ClientDownloads.vue b/frontend/src/components/ClientDownloads.vue
index 8a70e33..257c3a2 100644
--- a/frontend/src/components/ClientDownloads.vue
+++ b/frontend/src/components/ClientDownloads.vue
@@ -7,6 +7,7 @@
 // because a wrong guess must cost a person nothing.
 import { computed } from "vue";
 import { useConfigStore, type ClientRelease } from "../stores/config";
+import { roughSize } from "../size";
 
 const config = useConfigStore();
 
@@ -108,13 +109,6 @@ const missingPlatform = computed(() =>
 const hasLinux = computed(() => Object.keys(config.clients).some((id) => id.startsWith("linux-")));
 const installCommand = `curl -fsSL ${window.location.origin}/install.sh | sh`;
 
-// One decimal below 10 MB, none above: these sit in one list where a 2.7 MB
-// package and a 95 MB AppImage are compared, and "3 MB" next to "95 MB" loses the
-// only distinction that matters at the small end.
-function readableSize(bytes: number): string {
-  const mb = bytes / 1024 / 1024;
-  return `${mb < 10 ? mb.toFixed(1) : mb.toFixed(0)} MB`;
-}
 </script>
 
 <template>
@@ -144,7 +138,7 @@ function readableSize(bytes: number): string {
                    second source to contradict it, a wrong version here is a wrong
                    answer nothing can catch. Not knowing which build it is, is also
                    not a reason to withhold the download. -->
-              Version {{ client.version || "unknown" }} · {{ readableSize(client.size) }}<span
+              Version {{ client.version || "unknown" }} · {{ roughSize(client.size, "MB") }}<span
                 v-if="client.platform === 'linux-appimage'"
                 >, and the only one that updates itself in place</span
               >
diff --git a/frontend/src/components/LabelsModal.vue b/frontend/src/components/LabelsModal.vue
index c42696c..544055e 100644
--- a/frontend/src/components/LabelsModal.vue
+++ b/frontend/src/components/LabelsModal.vue
@@ -58,11 +58,7 @@ async function doMerge(sourceId: string, targetId: string) {
 </script>
 
 <template>
-  <BaseModal panel-class="w-full max-w-sm shadow-xl" @close="emit('close')">
-    <div class="flex items-center justify-between border-b border-neutral-100 px-4 py-3 dark:border-neutral-800">
-        <h2 class="text-sm font-semibold">Manage tags</h2>
-        <button type="button" class="icon-btn" aria-label="Close" @click="emit('close')"><Icon name="close" /></button>
-      </div>
+  <BaseModal panel-class="w-full max-w-sm shadow-xl" title="Manage tags" @close="emit('close')">
       <div class="flex flex-col gap-2 p-4">
         <form class="flex items-center gap-2" @submit.prevent="add">
           <Icon name="plus" />
diff --git a/frontend/src/components/ShareDialog.vue b/frontend/src/components/ShareDialog.vue
index d03b7a2..855be61 100644
--- a/frontend/src/components/ShareDialog.vue
+++ b/frontend/src/components/ShareDialog.vue
@@ -105,11 +105,7 @@ onMounted(load);
 </script>
 
 <template>
-  <BaseModal panel-class="w-full max-w-md shadow-xl" @close="emit('close')">
-    <div class="flex items-center justify-between border-b border-neutral-100 px-4 py-3 dark:border-neutral-800">
-      <h2 class="text-sm font-semibold">Share note</h2>
-      <button type="button" class="icon-btn" aria-label="Close" @click="emit('close')"><Icon name="close" /></button>
-    </div>
+  <BaseModal panel-class="w-full max-w-md shadow-xl" title="Share note" @close="emit('close')">
 
     <div class="flex flex-col gap-4 p-4">
       <p v-if="loading" class="py-4 text-center text-sm text-neutral-400">Loading…</p>
diff --git a/frontend/src/desktop/bridge.ts b/frontend/src/desktop/bridge.ts
index ff67ea0..fd4366f 100644
--- a/frontend/src/desktop/bridge.ts
+++ b/frontend/src/desktop/bridge.ts
@@ -32,6 +32,17 @@ export interface IntegrationStatus {
   appimage_path: string | null;
 }
 
+/**
+ * Run `handler` with each payload of a desktop event. Returns an unlisten function,
+ * or a no-op where there is no event API (the web build, or a desktop runtime that
+ * doesn't expose one).
+ */
+async function listen<T>(event: string, handler: (payload: T) => void): Promise<() => void> {
+  const events = window.__TAURI__?.event;
+  if (!events) return () => {};
+  return events.listen<T>(event, (e) => handler(e.payload));
+}
+
 /** True when running inside the Tauri desktop shell (vs. the web build). */
 export function isDesktop(): boolean {
   return typeof window !== "undefined" && !!window.__TAURI__;
@@ -200,9 +211,7 @@ const SYNCED_EVENT = "inkwell://synced";
  * there, so there is nothing to hear.
  */
 export async function onSynced(handler: (cycle: LastCycle) => void): Promise<() => void> {
-  const events = window.__TAURI__?.event;
-  if (!events) return () => {};
-  return events.listen<LastCycle>(SYNCED_EVENT, (e) => handler(e.payload));
+  return listen<LastCycle>(SYNCED_EVENT, handler);
 }
 
 export const sync = {
@@ -295,9 +304,7 @@ export const capture = {
  * what it has until its next load, which is a stale list rather than a broken one.
  */
 export async function onCaptured(handler: () => void): Promise<() => void> {
-  const events = window.__TAURI__?.event;
-  if (!events) return () => {};
-  return events.listen(CAPTURED_EVENT, () => handler());
+  return listen(CAPTURED_EVENT, () => handler());
 }
 
 /** A reminder the desktop's reminder worker found due (desktop/src-tauri/src/reminders.rs). */
@@ -319,7 +326,5 @@ const REMINDER_DUE_EVENT = "inkwell://reminder-due";
  * Returns an unlisten function, or a no-op where there is no event API.
  */
 export async function onReminderDue(handler: (reminder: DueReminder) => void): Promise<() => void> {
-  const events = window.__TAURI__?.event;
-  if (!events) return () => {};
-  return events.listen<DueReminder>(REMINDER_DUE_EVENT, (e) => handler(e.payload));
+  return listen<DueReminder>(REMINDER_DUE_EVENT, handler);
 }
diff --git a/frontend/src/size.ts b/frontend/src/size.ts
new file mode 100644
index 0000000..b9d7759
--- /dev/null
+++ b/frontend/src/size.ts
@@ -0,0 +1,13 @@
+// How big something is, in words a person reads at a glance.
+
+const UNITS = { MB: 1024 ** 2, GB: 1024 ** 3 } as const;
+
+/**
+ * `bytes` in `unit`, with one decimal below 10 and none above. Sizes sit in lists
+ * where a 2.7 MB package and a 95 MB AppImage are compared, and "3 MB" next to
+ * "95 MB" loses the only distinction that matters at the small end.
+ */
+export function roughSize(bytes: number, unit: keyof typeof UNITS): string {
+  const n = bytes / UNITS[unit];
+  return `${n < 10 ? n.toFixed(1) : n.toFixed(0)} ${unit}`;
+}
diff --git a/frontend/src/views/AccountView.vue b/frontend/src/views/AccountView.vue
index d62dc53..95fb316 100644
--- a/frontend/src/views/AccountView.vue
+++ b/frontend/src/views/AccountView.vue
@@ -14,6 +14,7 @@ import { formatDateTime } from "../notes/datetime";
 import { repo } from "../adapters";
 import type { StorageUse } from "../adapters/repo";
 import { useAction } from "../composables/useAction";
+import { roughSize } from "../size";
 
 // The signed-in person's own account (not admin): the native clients linked to it
 // (the desktop and Android apps sync with a device bearer token issued here), its
@@ -51,14 +52,9 @@ async function load() {
 // Attachment storage (#2939 §4): how much this account uses, against its limit.
 const storage = ref<StorageUse | null>(null);
 
-function gigabytes(bytes: number): string {
-  const gb = bytes / 1024 ** 3;
-  return `${gb < 10 ? gb.toFixed(1) : gb.toFixed(0)} GB`;
-}
-
 function storageLine(use: StorageUse): string {
-  const used = gigabytes(use.used_bytes);
-  return use.limit_bytes === null ? `${used} used` : `${used} of ${gigabytes(use.limit_bytes)} used`;
+  const used = roughSize(use.used_bytes, "GB");
+  return use.limit_bytes === null ? `${used} used` : `${used} of ${roughSize(use.limit_bytes, "GB")} used`;
 }
 
 async function link() {
diff --git a/frontend/src/views/SyncView.vue b/frontend/src/views/SyncView.vue
index d5b2ed5..0e7d031 100644
--- a/frontend/src/views/SyncView.vue
+++ b/frontend/src/views/SyncView.vue
@@ -107,6 +107,46 @@ const offeredServer = computed(
   () => source.value ?? status.value?.server_url?.replace(/\/+$/, "") ?? null,
 );
 
+// The two choices on the update card, each a radio with a name and a line on what
+// choosing it means.
+interface UpdateOption {
+  title: string;
+  detail: string;
+  checked: boolean;
+  pick: () => Promise<void>;
+}
+
+const sourceOptions = computed<UpdateOption[]>(() => [
+  {
+    title: "Fabled-Git",
+    detail: "Where Inkwell is published, on the channel below.",
+    checked: source.value === null,
+    pick: () => switchSource(null),
+  },
+  {
+    title: offeredServer.value ?? "",
+    detail:
+      "The build that server holds. It passes on official builds only: every update is checked against the signature built into this app first.",
+    checked: source.value !== null,
+    pick: () => switchSource(offeredServer.value),
+  },
+]);
+
+const channelOptions = computed<UpdateOption[]>(() => [
+  {
+    title: "Stable",
+    detail: "Released versions only.",
+    checked: channel.value === "stable",
+    pick: () => switchChannel("stable"),
+  },
+  {
+    title: "Development",
+    detail: "Every build that passes CI. Newer, and less tested.",
+    checked: channel.value === "dev",
+    pick: () => switchChannel("dev"),
+  },
+]);
+
 // --- Quick capture -----------------------------------------------------------
 // A desktop-local preference, so it lives here beside the update channel rather
 // than in admin Settings: that screen is the SERVER's, and this is a property of
@@ -147,15 +187,20 @@ async function checkUpdates() {
   }
 }
 
+// After a channel or source switch: the last answer described somewhere else, so it
+// means nothing now. Forget it and ask again.
+async function recheck() {
+  update.value = null;
+  checkedOnce.value = false;
+  await checkUpdates();
+}
+
 async function switchChannel(next: UpdateChannel) {
   if (next === channel.value) return;
   updateError.value = "";
   try {
     channel.value = await updateBridge.setChannel(next);
-    // The previous answer described the OTHER channel, so it's meaningless now.
-    update.value = null;
-    checkedOnce.value = false;
-    await checkUpdates();
+    await recheck();
   } catch (e) {
     updateError.value = errorMessage(e, "The update channel couldn't be changed.");
   }
@@ -166,10 +211,7 @@ async function switchSource(next: string | null) {
   updateError.value = "";
   try {
     source.value = await updateBridge.setSource(next);
-    // Same reason as a channel switch: the last answer came from somewhere else.
-    update.value = null;
-    checkedOnce.value = false;
-    await checkUpdates();
+    await recheck();
   } catch (e) {
     updateError.value = errorMessage(e, "The update source couldn't be changed.");
   }
@@ -613,35 +655,11 @@ onBeforeUnmount(() => stopSyncListener?.());
           Updates from
         </legend>
         <div class="mt-2 flex flex-col gap-2">
-          <label class="flex items-start gap-2 text-sm">
-            <input
-              type="radio"
-              class="mt-1"
-              name="update-source"
-              :checked="source === null"
-              @change="switchSource(null)"
-            />
+          <label v-for="o in sourceOptions" :key="o.title" class="flex items-start gap-2 text-sm">
+            <input type="radio" class="mt-1" name="update-source" :checked="o.checked" @change="o.pick()" />
             <span>
-              <span class="font-medium">Fabled-Git</span>
-              <span class="block text-neutral-500 dark:text-neutral-400">
-                Where Inkwell is published, on the channel below.
-              </span>
-            </span>
-          </label>
-          <label class="flex items-start gap-2 text-sm">
-            <input
-              type="radio"
-              class="mt-1"
-              name="update-source"
-              :checked="source !== null"
-              @change="switchSource(offeredServer)"
-            />
-            <span>
-              <span class="font-medium">{{ offeredServer }}</span>
-              <span class="block text-neutral-500 dark:text-neutral-400">
-                The build that server holds. It passes on official builds only: every
-                update is checked against the signature built into this app first.
-              </span>
+              <span class="font-medium">{{ o.title }}</span>
+              <span class="block text-neutral-500 dark:text-neutral-400">{{ o.detail }}</span>
             </span>
           </label>
         </div>
@@ -653,36 +671,11 @@ onBeforeUnmount(() => stopSyncListener?.());
           Channel
         </legend>
         <div class="mt-2 flex flex-col gap-2">
-          <label class="flex items-start gap-2 text-sm">
-            <input
-              type="radio"
-              class="mt-1"
-              name="update-channel"
-              value="stable"
-              :checked="channel === 'stable'"
-              @change="switchChannel('stable')"
-            />
+          <label v-for="o in channelOptions" :key="o.title" class="flex items-start gap-2 text-sm">
+            <input type="radio" class="mt-1" name="update-channel" :checked="o.checked" @change="o.pick()" />
             <span>
-              <span class="font-medium">Stable</span>
-              <span class="block text-neutral-500 dark:text-neutral-400">
-                Released versions only.
-              </span>
-            </span>
-          </label>
-          <label class="flex items-start gap-2 text-sm">
-            <input
-              type="radio"
-              class="mt-1"
-              name="update-channel"
-              value="dev"
-              :checked="channel === 'dev'"
-              @change="switchChannel('dev')"
-            />
-            <span>
-              <span class="font-medium">Development</span>
-              <span class="block text-neutral-500 dark:text-neutral-400">
-                Every build that passes CI. Newer, and less tested.
-              </span>
+              <span class="font-medium">{{ o.title }}</span>
+              <span class="block text-neutral-500 dark:text-neutral-400">{{ o.detail }}</span>
             </span>
           </label>
         </div>