diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index d15b2cb61..068f1fb70 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -96,19 +96,6 @@ module.exports = {
         "e2e/soak/support/probes.ts",
         "e2e/soak/support/tracker.ts",
         "e2e/tests/send-across-restart.spec.ts",
-        "electron/embeddedServerManager.ts",
-        "electron/gameList.ts",
-        "electron/helperStartup.ts",
-        "electron/presenceHelper.ts",
-        "electron/processWatcher.ts",
-        "src/components/AuthLoadingOverlay.tsx",
-        "src/components/mainApp.tsx",
-        "src/components/microphoneDebugOverlay.tsx",
-        "src/components/onboarding/OnboardingTour.tsx",
-        "src/components/serviceStatusBanner.tsx",
-        "src/components/sidebar.tsx",
-        "src/components/updateToastState.ts",
-        "src/components/videoDebugOverlay.tsx",
         "src/lib/reports/callTimeline.ts",
         "src/packages/addons/src/pluginPanels.ts",
         "src/packages/common/src/auth/keycloak.ts",
diff --git a/electron/embeddedServerManager.ts b/electron/embeddedServerManager.ts
index 264189278..5dea0db4b 100644
--- a/electron/embeddedServerManager.ts
+++ b/electron/embeddedServerManager.ts
@@ -95,8 +95,7 @@ function explainExit(
   source: LogSource,
   code: number | null,
 ): string {
-  const label =
-    source === "sfu" ? "SFU" : source === "worker" ? "Media worker" : "Server";
+  const label = { sfu: "SFU", worker: "Media worker" }[source as string] ?? "Server";
   const lines = recentOutput.get(outputKey(owner, source)) ?? [];
 
   // Prefer a line that names the actual failure over the last line, which is
@@ -347,7 +346,7 @@ function readBundledVersions(): { server?: string; sfu?: string; worker?: string
   const runtimeRoot = packagedRuntimeRoot();
   const packaged = runtimeRoot ? join(runtimeRoot, "versions.json") : null;
   const dev = join(app.getAppPath(), "build", "embedded-server", "versions.json");
-  const path = packaged && existsSync(packaged) ? packaged : existsSync(dev) ? dev : null;
+  const path = [packaged, dev].find((p) => p && existsSync(p)) ?? null;
   if (!path) return {};
 
   try {
@@ -374,7 +373,7 @@ function getWorkerEntryPath(): string | null {
 function getSfuBinaryPath(): string | null {
   const ext = process.platform === "win32" ? ".exe" : "";
   const name = `gryt_sfu${ext}`;
-  const ebOs = process.platform === "win32" ? "win" : process.platform === "darwin" ? "mac" : "linux";
+  const ebOs = { win32: "win", darwin: "mac" }[process.platform as string] ?? "linux";
   const ebArch = process.arch === "arm64" ? "arm64" : "x64";
   const runtimeRoot = packagedRuntimeRoot();
   const packaged = runtimeRoot ? join(runtimeRoot, "sfu", name) : null;
diff --git a/electron/gameList.ts b/electron/gameList.ts
index 68325493c..47a132731 100644
--- a/electron/gameList.ts
+++ b/electron/gameList.ts
@@ -72,7 +72,7 @@ export function createGameIndex(games: readonly GameEntry[], platform: NodeJS.Pl
   const byComm = new Map<string, string>();
 
   // Proton runs Windows games on Linux under their Windows names.
-  const oses: GameOs[] = platform === "linux" ? ["linux", "win32"] : platform === "darwin" ? ["darwin"] : ["win32"];
+  const oses: GameOs[] = ({ linux: ["linux", "win32"], darwin: ["darwin"] } as Record<string, GameOs[]>)[platform] ?? ["win32"];
 
   for (const game of games) {
     for (const id of game.ids) if (!byApp.has(id)) byApp.set(id, game.name);
diff --git a/electron/helperStartup.ts b/electron/helperStartup.ts
index 5768e0bad..81cbceabe 100644
--- a/electron/helperStartup.ts
+++ b/electron/helperStartup.ts
@@ -193,7 +193,8 @@ export const runQuietly = (command: string, args: string[]): Promise<number> =>
   new Promise((resolve) => {
     execFile(command, args, { timeout: 10_000, windowsHide: true }, (err) => {
       const code = (err as { code?: unknown } | null)?.code;
-      resolve(err ? (typeof code === "number" ? code : 1) : 0);
+      if (!err) resolve(0);
+      else resolve(typeof code === "number" ? code : 1);
     });
   });
 
diff --git a/electron/presenceHelper.ts b/electron/presenceHelper.ts
index e020a712a..fadfdf220 100644
--- a/electron/presenceHelper.ts
+++ b/electron/presenceHelper.ts
@@ -134,6 +134,9 @@ export function createPresenceSource(options: PresenceSourceOptions): PresenceSo
       link = null;
       await this.stop();
     },
-    via: () => (link ? "helper" : host ? "app" : null),
+    via: () => {
+      if (link) return "helper";
+      return host ? "app" : null;
+    },
   };
 }
diff --git a/electron/processWatcher.ts b/electron/processWatcher.ts
index 4d7c8f9a9..e2554cfd0 100644
--- a/electron/processWatcher.ts
+++ b/electron/processWatcher.ts
@@ -231,9 +231,12 @@ export async function listRunningPrograms(): Promise<string[]> {
     seen.set(key, basename(raw.replace(/\\/g, "/")));
   }
 
-  return [...seen.values()].sort((a, b) =>
-    a.toLowerCase() < b.toLowerCase() ? -1 : a.toLowerCase() > b.toLowerCase() ? 1 : 0,
-  );
+  return [...seen.values()].sort((a, b) => {
+    const x = a.toLowerCase();
+    const y = b.toLowerCase();
+    if (x === y) return 0;
+    return x < y ? -1 : 1;
+  });
 }
 
 /* ── The watcher ─────────────────────────────────────────────────────── */
diff --git a/scripts/check-embedded-starting.mjs b/scripts/check-embedded-starting.mjs
index 61832997b..497a9b9d1 100644
--- a/scripts/check-embedded-starting.mjs
+++ b/scripts/check-embedded-starting.mjs
@@ -61,7 +61,10 @@ const statusLines = (() => {
   assert.notEqual(start, -1, `${SIDEBAR} no longer reads rawStatus. Move this check with it.`);
   const ring = sidebar.indexOf("const ringState", start);
   assert.notEqual(ring, -1, `${SIDEBAR} no longer declares ringState after rawStatus. Move this check with it.`);
-  return sidebar.slice(start, sidebar.indexOf(";", ring) + 1).replace(/: ServerRingState/g, "");
+  const fn = sidebar.indexOf("function ringStateOf(");
+  assert.notEqual(fn, -1, `${SIDEBAR} no longer has ringStateOf(). Move this check with it.`);
+  const ringStateOf = sidebar.slice(fn, sidebar.indexOf("\n}\n", fn) + 2).replace(/\(s: \{[^}]*\}\): ServerRingState/, "(s)");
+  return `${ringStateOf}\n${sidebar.slice(start, sidebar.indexOf(";", ring) + 1)}`;
 })();
 
 /* The hover card's connection words, each with the condition it is drawn under. A new one
diff --git a/src/components/AuthLoadingOverlay.tsx b/src/components/AuthLoadingOverlay.tsx
index 617fa9707..c0c421284 100644
--- a/src/components/AuthLoadingOverlay.tsx
+++ b/src/components/AuthLoadingOverlay.tsx
@@ -29,6 +29,12 @@ const SPLASH_COPY = {
   slow: "This is taking longer than it should. Gryt will carry on without an account in a moment.",
 } as const;
 
+function splashMessage(reach: AccountsReach | null, slow: boolean) {
+  if (reach === "unreachable") return "accounts-down";
+  if (reach === "offline") return "offline";
+  return slow ? "slow" : "normal";
+}
+
 export function AuthLoadingOverlay({
   open,
   fadeDurationMs = 450,
@@ -62,14 +68,7 @@ export function AuthLoadingOverlay({
     };
   }, [open]);
 
-  const message =
-    reach === "unreachable"
-      ? "accounts-down"
-      : reach === "offline"
-        ? "offline"
-        : slow
-          ? "slow"
-          : "normal";
+  const message = splashMessage(reach, slow);
 
   useEffect(() => {
     if (!open) {
diff --git a/src/components/mainApp.tsx b/src/components/mainApp.tsx
index 1c97a54cb..35e1a2e03 100644
--- a/src/components/mainApp.tsx
+++ b/src/components/mainApp.tsx
@@ -61,9 +61,9 @@ export function MainApp() {
 
   /* What a bug report calls "where you were". Recorded here rather than in the
      report form, which would always answer "the report form". */
-  useRememberPlace(
-    showDiscovery ? "discovery" : Object.keys(servers).length > 0 ? "server" : "empty",
-  );
+  const hasServers = Object.keys(servers).length > 0;
+  const emptyPlace = hasServers ? "server" : "empty";
+  useRememberPlace(showDiscovery ? "discovery" : emptyPlace);
 
   /* The page to reopen on the next launch. Not the one above, which is only what
      a bug report says and is never read back. */
@@ -87,13 +87,10 @@ export function MainApp() {
       <DmFeeds />
       <NewMessageDialog />
 
-      {dmSpaceOpen && Object.keys(servers).length > 0 ? (
-        <ServerView dmSpace />
-      ) : showDiscovery ? (
-        <Discovery />
-      ) : Object.keys(servers).length > 0 ? (
-        <ServerView />
-      ) : (
+      {dmSpaceOpen && hasServers && <ServerView dmSpace />}
+      {!(dmSpaceOpen && hasServers) && showDiscovery && <Discovery />}
+      {!dmSpaceOpen && !showDiscovery && hasServers && <ServerView />}
+      {!showDiscovery && !hasServers && (
         /* Was a line of text with a finger emoji pointing at the sidebar. That is
            the tour's job; somebody who dismissed it still ends up here. */
         <div className="flex grow items-center justify-center">
diff --git a/src/components/microphoneDebugOverlay.tsx b/src/components/microphoneDebugOverlay.tsx
index 3fcf0ba80..0aa02b48d 100644
--- a/src/components/microphoneDebugOverlay.tsx
+++ b/src/components/microphoneDebugOverlay.tsx
@@ -16,6 +16,11 @@ const StateDot = ({ on }: { on: boolean }) => (
   <PiCircleFill size={8} color={on ? "var(--gryt-success-11)" : "var(--gryt-danger-11)"} />
 );
 
+function volumeColour(volume: number): string {
+  if (volume > 80) return "var(--gryt-danger-9)";
+  return volume > 50 ? "var(--gryt-warning-9)" : "var(--gryt-success-9)";
+}
+
 export function MicrophoneDebugOverlay({ isVisible }: MicrophoneDebugOverlayProps) {
   const { 
     microphoneBuffer, 
@@ -143,7 +148,7 @@ export function MicrophoneDebugOverlay({ isVisible }: MicrophoneDebugOverlayProp
         <div style={{ marginLeft: "8px", fontSize: "11px" }}>
           <div>ID: {micID ? micID.slice(0, 8) + "..." : "None"}</div>
           <div>Name: {currentDevice?.label || "Unknown"}</div>
-          <div>Available: {devicesLoading ? "Loading..." : devicesError ? "Error" : `${devices.length} devices`}</div>
+          <div>Available: {devicesLoading && "Loading..."}{!devicesLoading && devicesError && "Error"}{!devicesLoading && !devicesError && `${devices.length} devices`}</div>
           {devicesError && (
             <div style={{ color: "var(--gryt-danger-11)", fontSize: "10px" }}>
               {devicesError}
@@ -201,8 +206,7 @@ export function MicrophoneDebugOverlay({ isVisible }: MicrophoneDebugOverlayProp
           <div style={{
             width: `${Math.min(processedVolume, 100)}%`,
             height: "100%",
-            backgroundColor: processedVolume > 80 ? "var(--gryt-danger-9)" : 
-                           processedVolume > 50 ? "var(--gryt-warning-9)" : "var(--gryt-success-9)",
+            backgroundColor: volumeColour(processedVolume),
             transition: "width 0.1s ease-out"
           }} />
         </div>
diff --git a/src/components/onboarding/OnboardingTour.tsx b/src/components/onboarding/OnboardingTour.tsx
index ac1db7eb6..12ade9fa2 100644
--- a/src/components/onboarding/OnboardingTour.tsx
+++ b/src/components/onboarding/OnboardingTour.tsx
@@ -324,9 +324,7 @@ export function OnboardingTour({ onFinish }: { onFinish: () => void }) {
   const rightOfTarget = cut ? cut.left + cut.width + OFFSET : 0;
   const fitsOnTheRight = rightOfTarget + CARD_WIDTH + 16 <= window.innerWidth;
 
-  const card = !cut
-    ? null
-    : step.side === "right"
+  const card = cut && (step.side === "right"
       ? {
           top: Math.min(
             Math.max(cut.top + cut.height / 2 - 90, 16),
@@ -342,7 +340,7 @@ export function OnboardingTour({ onFinish }: { onFinish: () => void }) {
             Math.max(cut.left + cut.width / 2 - CARD_WIDTH / 2, 16),
             window.innerWidth - CARD_WIDTH - 16
           )
-        };
+        });
 
   // **Portaled to body, and it has to be.** The app renders inside
   // `.radix-themes`, a stacking context, so no z-index would beat a dialog.
diff --git a/src/components/serviceStatusBanner.tsx b/src/components/serviceStatusBanner.tsx
index 195a737e0..6a78c2137 100644
--- a/src/components/serviceStatusBanner.tsx
+++ b/src/components/serviceStatusBanner.tsx
@@ -54,6 +54,12 @@ const TONE: Record<AnnouncementType, string> = {
 const OFFLINE =
   "You're offline, so Gryt couldn't check your account. It'll check again once you're back online.";
 
+/* Not reachable is a warning whatever else is going on. Offline is just a fact. */
+const UNANNOUNCED = {
+  unreachable: { message: GENERIC, Glyph: PiWarningFill },
+  offline: { message: OFFLINE, Glyph: PiInfoFill },
+};
+
 /**
  * Signed in, or launched while accounts couldn't be checked. A guest on a normal
  * day has nothing that breaks when the account services go down.
@@ -144,21 +150,12 @@ export function ServiceStatusBanner() {
 
   if (!banner) return null;
 
-  const message =
+  const { message, Glyph } =
     banner.kind === "announced"
-      ? banner.announcement.message
-      : banner.kind === "offline"
-        ? OFFLINE
-        : GENERIC;
+      ? { message: banner.announcement.message, Glyph: ICON[banner.announcement.type] }
+      : UNANNOUNCED[banner.kind];
   const tone =
     banner.kind === "announced" ? TONE[banner.announcement.type] : "warning";
-  /* Not reachable is a warning whatever else is going on. Offline is just a fact. */
-  const Glyph =
-    banner.kind === "announced"
-      ? ICON[banner.announcement.type]
-      : banner.kind === "offline"
-        ? PiInfoFill
-        : PiWarningFill;
 
   if (message === dismissed) return null;
 
diff --git a/src/components/sidebar.tsx b/src/components/sidebar.tsx
index 1643f8297..1747a7590 100644
--- a/src/components/sidebar.tsx
+++ b/src/components/sidebar.tsx
@@ -68,6 +68,20 @@ async function copyServerAddress(host: string): Promise<void> {
   }
 }
 
+function ringStateOf(s: { isStarting: boolean; isSettling: boolean; isReconnecting: boolean; isConnecting: boolean }): ServerRingState {
+  if (s.isStarting) return "starting";
+  if (s.isSettling) return "settling";
+  if (s.isReconnecting) return "reconnecting";
+  return s.isConnecting ? "connecting" : "none";
+}
+
+function iconOpacity(s: { bright: boolean; isUnavailable: boolean; awaitingApproval: boolean; isReconnecting: boolean }) {
+  if (s.bright) return 1;
+  if (s.isUnavailable) return 0.45;
+  if (s.awaitingApproval) return 0.4;
+  return s.isReconnecting ? undefined : 0.5;
+}
+
 export function Sidebar({ setShowAddServer }: SidebarProps) {
   const { isSignedIn, login, logout } = useAccount();
   const { nickname, avatarDataUrl, setShowSettings, openSettings } = useSettings();
@@ -439,15 +453,7 @@ function ServerItem({
    */
   const isSettling = !rawStatus && !settleExpired && !isStarting;
 
-  const ringState: ServerRingState = isStarting
-    ? "starting"
-    : isSettling
-      ? "settling"
-      : isReconnecting
-        ? "reconnecting"
-        : isConnecting
-          ? "connecting"
-          : "none";
+  const ringState = ringStateOf({ isStarting, isSettling, isReconnecting, isConnecting });
   /* Waiting on a moderator (GRYT-289). Not a connection state: the server is
      reachable and answering, it just has not let this person in yet. */
   const awaitingApproval = Boolean(servers[host]?.approvalRequestedAt);
@@ -490,16 +496,12 @@ function ServerItem({
                   style={{
                     // A server you just created keeps its colour. Greying it
                     // would say something is wrong; the ring says not ready.
-                    opacity:
-                      currentlyViewingServer?.host === host || isStarting
-                        ? 1
-                        : isUnavailable
-                        ? 0.45
-                        : awaitingApproval
-                        ? 0.4
-                        : isReconnecting
-                        ? undefined
-                        : 0.5,
+                    opacity: iconOpacity({
+                      bright: currentlyViewingServer?.host === host || isStarting,
+                      isUnavailable,
+                      awaitingApproval,
+                      isReconnecting,
+                    }),
                     filter:
                       !isStarting &&
                       (isUnavailable || isReconnecting || awaitingApproval)
diff --git a/src/components/updateToastState.ts b/src/components/updateToastState.ts
index 73b3fd010..bb502e5c3 100644
--- a/src/components/updateToastState.ts
+++ b/src/components/updateToastState.ts
@@ -1,5 +1,9 @@
 import type { UpdateStatus } from "../lib/electron";
 
+function downloadPhase(autoDownload: boolean | undefined) {
+  return autoDownload ? "downloading" : "waiting";
+}
+
 /** One id for every release, so a newer one redraws the toast in place rather than stacking a second. */
 export const UPDATE_TOAST_ID = "update";
 
@@ -38,7 +42,7 @@ export function nextShown(current: Shown | null, status: UpdateStatus): Shown |
       version: status.version,
       /* Announced with `autoDownload` means the bytes are already moving —
          the main process says so once electron-updater starts fetching. */
-      phase: status.storeManaged ? "store" : status.autoDownload ? "downloading" : "waiting",
+      phase: status.storeManaged ? "store" : downloadPhase(status.autoDownload),
       /* Only when the release changed: a press during a download installs that same one. */
       newerAfterPress:
         Boolean(status.installWhenReady) &&
diff --git a/src/components/videoDebugOverlay.tsx b/src/components/videoDebugOverlay.tsx
index 290ec5b70..4a3735ead 100644
--- a/src/components/videoDebugOverlay.tsx
+++ b/src/components/videoDebugOverlay.tsx
@@ -194,11 +194,16 @@ function useVideoDebugDiagnostics(enabled: boolean): VideoDiagnostics {
   return diagnostics;
 }
 
+function flag(value: boolean | null | undefined, yes: string, no: string): string | null {
+  if (value == null) return null;
+  return value ? yes : no;
+}
+
 function SenderSection({ s }: { s: SenderDiagnostics }) {
   const stateParts = [
     s.readyState ?? "—",
-    s.enabled == null ? null : s.enabled ? "enabled" : "disabled",
-    s.muted == null ? null : s.muted ? "muted" : "unmuted",
+    flag(s.enabled, "enabled", "disabled"),
+    flag(s.muted, "muted", "unmuted"),
   ].filter(Boolean);
 
   return (
@@ -211,7 +216,7 @@ function SenderSection({ s }: { s: SenderDiagnostics }) {
           {s.frameRate != null ? ` @ ${fmt(s.frameRate, 1)} fps` : ""}
         </div>
         <div>
-          Encoding: {s.encodingActive == null ? "—" : s.encodingActive ? "active" : "inactive"}
+          Encoding: {flag(s.encodingActive, "active", "inactive") ?? "—"}
           {" / "}max {s.maxBitrateKbps != null ? `${fmtInt(s.maxBitrateKbps)} kbps` : "—"}
         </div>
       </div>
@@ -376,7 +381,7 @@ export function VideoDebugOverlay({ isVisible }: VideoDebugOverlayProps) {
       icon={<PiCameraFill size={16} />}
       status={{
         active: isConnected && hasVideo,
-        label: isConnected ? (hasVideo ? "Streaming" : "No video") : "Disconnected",
+        label: isConnected ? flag(hasVideo, "Streaming", "No video") ?? "" : "Disconnected",
       }}
       initialPosition={{ x: window.innerWidth - 680, y: 10 }}
     >