v0.1.8 — in-app update notifications

- Header indicator (pulsating dot + "NEW VERSION") when a newer release
  is published on GitHub. Replaces the version subtitle without growing
  the header.
- Modal with current → latest version, release notes preview (parsed
  from GitHub release body), copy-paste update command, link to repo
  and release notes, current star count, and "versions behind" badge.
- Auto-detects deploy mode (GHCR image vs source build) by inspecting
  the running container. Shows the matching update command, but always
  exposes both via tabs.
- Backend caches the GitHub API response for 6h (~8 calls/day per
  instance, far under the rate limit).

package.json

@@ -1,6 +1,6 @@
 {
   "name": "containerflow",
-  "version": "0.1.7",
+  "version": "0.1.8",
   "license": "AGPL-3.0-or-later",
   "author": "Jorge Gonzalez D. (RGJorge)",
   "type": "module",

src/client/components/HeaderBar.tsx

@@ -6,6 +6,8 @@ import {
 } from "lucide-react";
 import type { Service, DockerEvent, NotificationLogEntry } from "../../shared/types";
 import { useT } from "../i18n";
+import { useUpdateInfo } from "../hooks/useUpdateInfo";
+import { UpdateModal } from "./UpdateModal";
 
 export type Page = "dashboard" | "monitoring" | "settings";
 
@@ -191,6 +193,8 @@ export function HeaderBar({
   onOpenServiceDetail,
 }: HeaderBarProps) {
   const { t, lang, setLang } = useT();
+  const { info: updateInfo, showIndicator } = useUpdateInfo(token);
+  const [updateOpen, setUpdateOpen] = useState(false);
 
   return (
     <div className="flex items-center justify-between px-5 py-1 bg-slate-900/90 backdrop-blur-sm relative z-[9999]">
@@ -201,7 +205,8 @@ export function HeaderBar({
         <NavButton icon={Settings} label={t("header.settings")} active={activePage === "settings"} onClick={() => onPageChange("settings")} />
       </nav>
 
-      {/* Center: Logo */}
+      {/* Center: Logo. The "subtitle" line shows the current version normally,
+          but is replaced by the "update available" badge when an update ships. */}
       <div className="absolute left-1/2 -translate-x-1/2 flex items-center gap-2.5">
         <img
           src="/alteonx-logo.webp"
@@ -211,7 +216,21 @@ export function HeaderBar({
         />
         <div className="flex flex-col items-end">
           <span className="text-base font-bold text-white tracking-wide">ContainerFlow</span>
+          {showIndicator && updateInfo?.latest ? (
+            <button
+              onClick={() => setUpdateOpen(true)}
+              className="flex items-center gap-1 text-[9px] font-semibold uppercase tracking-wider text-emerald-400 hover:text-emerald-300 transition-colors whitespace-nowrap -mt-1 animate-pulse hover:animate-none"
+              title={`v${updateInfo.current} → v${updateInfo.latest}`}
+            >
+              <span className="relative flex h-1.5 w-1.5">
+                <span className="absolute inline-flex h-full w-full rounded-full bg-emerald-400 opacity-75 animate-ping" />
+                <span className="relative inline-flex rounded-full h-1.5 w-1.5 bg-emerald-400" />
+              </span>
+              {t("update.available")}
+            </button>
+          ) : (
             <span className="text-[9px] text-slate-500 font-mono -mt-1">v{__APP_VERSION__}</span>
+          )}
         </div>
       </div>
 
@@ -267,6 +286,13 @@ export function HeaderBar({
           </button>
         )}
       </div>
+
+      {updateOpen && updateInfo && (
+        <UpdateModal
+          info={updateInfo}
+          onClose={() => setUpdateOpen(false)}
+        />
+      )}
     </div>
   );
 }

src/client/components/UpdateModal.tsx

@@ -0,0 +1,234 @@
+import { useEffect, useState } from "react";
+import { createPortal } from "react-dom";
+import { X, ExternalLink, Copy, Check, Container, GitBranch, Github, Star } from "lucide-react";
+import type { UpdateInfo, DeployMode } from "../../shared/types";
+import { useT } from "../i18n";
+
+interface UpdateModalProps {
+  info: UpdateInfo;
+  onClose: () => void;
+}
+
+type TabKey = Exclude<DeployMode, "unknown">;
+
+const COMMANDS: Record<TabKey, string> = {
+  ghcr: "docker compose pull && docker compose up -d",
+  source: "git pull && docker compose up -d --build",
+};
+
+export function UpdateModal({ info, onClose }: UpdateModalProps) {
+  const { t } = useT();
+  // Default tab: detected mode if it's ghcr or source, otherwise ghcr.
+  const initialTab: TabKey = info.deployMode === "source" ? "source" : "ghcr";
+  const [tab, setTab] = useState<TabKey>(initialTab);
+  const [copied, setCopied] = useState(false);
+
+  // Lock body scroll + block wheel events on canvas (React Flow zooms on wheel)
+  // while the modal is open. Restore on close.
+  useEffect(() => {
+    const prevOverflow = document.body.style.overflow;
+    document.body.style.overflow = "hidden";
+    const blockWheel = (e: WheelEvent) => {
+      const target = e.target as HTMLElement;
+      if (!target.closest("[data-update-modal]")) {
+        e.preventDefault();
+        e.stopPropagation();
+      }
+    };
+    document.addEventListener("wheel", blockWheel, { passive: false, capture: true });
+    return () => {
+      document.body.style.overflow = prevOverflow;
+      document.removeEventListener("wheel", blockWheel, { capture: true } as any);
+    };
+  }, []);
+
+  const copy = async () => {
+    const text = COMMANDS[tab];
+    let ok = false;
+    try {
+      if (navigator.clipboard && window.isSecureContext) {
+        await navigator.clipboard.writeText(text);
+        ok = true;
+      }
+    } catch {}
+    if (!ok) {
+      // Fallback for non-secure contexts (HTTP from LAN IP, older browsers).
+      try {
+        const ta = document.createElement("textarea");
+        ta.value = text;
+        ta.style.position = "fixed";
+        ta.style.left = "-9999px";
+        ta.style.top = "0";
+        ta.setAttribute("readonly", "");
+        document.body.appendChild(ta);
+        ta.focus();
+        ta.select();
+        ta.setSelectionRange(0, text.length);
+        ok = document.execCommand("copy");
+        document.body.removeChild(ta);
+      } catch {}
+    }
+    if (ok) {
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1500);
+    } else {
+      console.warn("ContainerFlow: clipboard copy failed");
+    }
+  };
+
+  const releaseLines = info.releaseNotes ? info.releaseNotes.split("\n").slice(0, 15) : [];
+
+  return createPortal(
+    <div
+      className="fixed inset-0 z-[100000] bg-black/60 backdrop-blur-sm flex items-center justify-center p-4"
+      onClick={onClose}
+    >
+      <div
+        data-update-modal
+        className="bg-slate-900 border border-slate-700 rounded-xl shadow-2xl w-full max-w-md max-h-[90vh] overflow-y-auto"
+        onClick={(e) => e.stopPropagation()}
+      >
+        {/* Header — 3-row grid so version aligns with "X versions behind"
+            badge, and release-notes link aligns with the repo link. */}
+        <div className="relative grid grid-cols-[1fr_auto] gap-x-4 gap-y-1.5 px-5 pt-5 pb-3 border-b border-slate-800 items-center">
+          {/* Close button — absolutely positioned top-right so it doesn't
+              affect grid row heights. */}
+          <button
+            onClick={onClose}
+            className="absolute top-3 right-3 text-slate-500 hover:text-slate-300 transition-colors"
+          >
+            <X size={18} />
+          </button>
+
+          {/* Row 1: label / (empty, X lives absolute) */}
+          <div className="text-xs uppercase tracking-wider text-emerald-400 font-semibold">
+            {t("update.available")}
+          </div>
+          <div className="w-5" /> {/* spacer matching X width */}
+
+          {/* Row 2: version / releases-behind badge */}
+          <div className="text-lg font-bold tracking-tight">
+            <span className="text-slate-300">v{info.current}</span>{" "}
+            <span className="text-slate-500">→</span>{" "}
+            <span className="text-emerald-400">v{info.latest}</span>
+          </div>
+          {info.releasesAhead > 1 ? (
+            <span className="text-[10px] font-semibold uppercase tracking-wider px-1.5 py-0.5 rounded bg-amber-500/15 border border-amber-500/30 text-amber-300 whitespace-nowrap justify-self-end">
+              {t("update.releasesBehind").replace("{n}", String(info.releasesAhead))}
+            </span>
+          ) : (
+            <div />
+          )}
+
+          {/* Row 3: release notes link / repo link */}
+          {info.releaseUrl ? (
+            <a
+              href={info.releaseUrl}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="inline-flex items-center gap-1.5 text-xs text-cyan-400 hover:text-cyan-300 transition-colors w-fit"
+            >
+              {t("update.fullNotes")}
+              <ExternalLink size={11} />
+            </a>
+          ) : (
+            <div />
+          )}
+          <a
+            href={info.repoUrl}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="group inline-flex items-center gap-1.5 text-xs text-slate-400 hover:text-slate-200 transition-colors whitespace-nowrap justify-self-end"
+          >
+            <Github size={12} />
+            {t("update.viewRepo")}
+            {info.stars !== null && (
+              <span className="inline-flex items-center gap-0.5">
+                · {info.stars.toLocaleString()}
+                <Star size={10} />
+              </span>
+            )}
+          </a>
+        </div>
+
+        {/* Release notes preview — caps height + scrolls when there are many changes */}
+        {releaseLines.length > 0 && (
+          <div className="px-5 py-4 border-b border-slate-800">
+            <div className="text-[11px] uppercase tracking-wider text-slate-500 font-semibold mb-2">
+              {t("update.whatsNew")}
+            </div>
+            <ul className="space-y-1 max-h-40 overflow-y-auto pr-1">
+              {releaseLines.map((line, i) => (
+                <li key={i} className="text-sm text-slate-300 leading-relaxed flex gap-2">
+                  <span className="text-slate-600 shrink-0">•</span>
+                  <span>{line}</span>
+                </li>
+              ))}
+            </ul>
+          </div>
+        )}
+
+        {/* How to update — tabs */}
+        <div className="px-5 py-4">
+          <div className="text-[11px] uppercase tracking-wider text-slate-500 font-semibold mb-2">
+            {t("update.howToUpdate")}
+          </div>
+
+          {/* Tab buttons */}
+          <div className="flex items-center gap-1 mb-3 bg-slate-800/50 rounded-lg p-1">
+            <button
+              onClick={() => setTab("ghcr")}
+              className={`flex-1 flex items-center justify-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium transition-colors ${
+                tab === "ghcr"
+                  ? "bg-slate-700 text-white"
+                  : "text-slate-400 hover:text-slate-200"
+              }`}
+            >
+              <Container size={13} />
+              {t("update.tabGhcr")}
+              {info.deployMode === "ghcr" && (
+                <span className="text-[9px] text-emerald-400 ml-0.5">●</span>
+              )}
+            </button>
+            <button
+              onClick={() => setTab("source")}
+              className={`flex-1 flex items-center justify-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium transition-colors ${
+                tab === "source"
+                  ? "bg-slate-700 text-white"
+                  : "text-slate-400 hover:text-slate-200"
+              }`}
+            >
+              <GitBranch size={13} />
+              {t("update.tabSource")}
+              {info.deployMode === "source" && (
+                <span className="text-[9px] text-emerald-400 ml-0.5">●</span>
+              )}
+            </button>
+          </div>
+
+          {/* Tab description */}
+          <div className="text-[11px] text-slate-500 mb-2">
+            {tab === "ghcr" ? t("update.ghcrHint") : t("update.sourceHint")}
+            {info.deployMode === tab && (
+              <span className="text-emerald-400 ml-1.5">· {t("update.detectedMode")}</span>
+            )}
+          </div>
+
+          {/* Command block */}
+          <div className="relative bg-slate-950 border border-slate-800 rounded-md p-3 pr-12 font-mono text-[11px] text-slate-200 overflow-x-auto">
+            <code className="whitespace-pre">{COMMANDS[tab]}</code>
+            <button
+              onClick={copy}
+              className="absolute top-2 right-2 p-1.5 rounded text-slate-500 hover:text-slate-200 hover:bg-slate-800 transition-colors"
+              title={copied ? t("update.copied") : t("update.copyCommand")}
+            >
+              {copied ? <Check size={13} className="text-emerald-400" /> : <Copy size={13} />}
+            </button>
+          </div>
+        </div>
+
+      </div>
+    </div>,
+    document.body
+  );
+}

src/client/hooks/useUpdateInfo.ts

@@ -0,0 +1,35 @@
+import { useCallback, useEffect, useState } from "react";
+import type { UpdateInfo } from "../../shared/types";
+
+/** Hook for in-app update notification.
+ *  - Fetches /api/update-info on mount + on window focus (server caches 6h)
+ *  - Indicator persists while `updateAvailable` is true — no dismiss option
+ *    by design, so users actually update instead of silencing the prompt.
+ */
+export function useUpdateInfo(token: string) {
+  const [info, setInfo] = useState<UpdateInfo | null>(null);
+
+  const refetch = useCallback(async () => {
+    const headers: Record<string, string> = {};
+    if (token) headers["Authorization"] = `Bearer ${token}`;
+    try {
+      const res = await fetch("/api/update-info", { headers });
+      if (!res.ok) return;
+      const data = (await res.json()) as UpdateInfo;
+      setInfo(data);
+    } catch {
+      // Network errors are silent — no notification shown
+    }
+  }, [token]);
+
+  useEffect(() => {
+    refetch();
+    const onFocus = () => refetch();
+    window.addEventListener("focus", onFocus);
+    return () => window.removeEventListener("focus", onFocus);
+  }, [refetch]);
+
+  const showIndicator = Boolean(info?.updateAvailable && info.latest);
+
+  return { info, showIndicator, refetch };
+}

src/client/i18n.tsx

@@ -34,6 +34,21 @@ const en = {
   "group.changeColor": "Change color",
   "group.resetColor": "Reset color",
 
+  // Update notification
+  "update.available": "Update available",
+  "update.whatsNew": "What's new",
+  "update.howToUpdate": "How to update",
+  "update.tabGhcr": "Prebuilt image",
+  "update.tabSource": "Local build",
+  "update.ghcrHint": "If you pulled the image from GitHub Container Registry.",
+  "update.sourceHint": "If you cloned the repo and build from source.",
+  "update.detectedMode": "Detected",
+  "update.copyCommand": "Copy command",
+  "update.copied": "Copied",
+  "update.fullNotes": "See full release notes",
+  "update.viewRepo": "View on GitHub",
+  "update.releasesBehind": "{n} versions behind",
+
   // Login
   "login.connecting": "Connecting...",
   "login.connect": "Connect",
@@ -305,6 +320,21 @@ const es: Record<TranslationKey, string> = {
   "group.saveAlias": "Guardar",
   "group.changeColor": "Cambiar color",
   "group.resetColor": "Restaurar color",
+
+  // Update notification
+  "update.available": "Nueva versión",
+  "update.whatsNew": "Qué hay de nuevo",
+  "update.howToUpdate": "Cómo actualizar",
+  "update.tabGhcr": "Imagen prebuilt",
+  "update.tabSource": "Build local",
+  "update.ghcrHint": "Si descargaste la imagen desde GitHub Container Registry.",
+  "update.sourceHint": "Si clonaste el repo y construís desde código fuente.",
+  "update.detectedMode": "Detectado",
+  "update.copyCommand": "Copiar comando",
+  "update.copied": "Copiado",
+  "update.fullNotes": "Ver notas completas",
+  "update.viewRepo": "Ver repositorio",
+  "update.releasesBehind": "{n} versiones atrás",
   "group.cancelAlias": "Cancelar",
 
   // Login

src/server/index.ts

@@ -10,6 +10,8 @@ import { loadDiscordConfig, saveDiscordConfig, notifyStateChange, notifyResource
 import { loadContainerSettings, saveContainerSettings } from "./container-settings";
 import { loadProjectAliases, saveProjectAliases, sanitizeAlias } from "./project-aliases";
 import { loadProjectColors, saveProjectColors, sanitizeColor } from "./project-colors";
+import { getUpdateInfo } from "./update-check";
+import pkg from "../../package.json";
 import { initStatsDB, insertStats, getStatsHistory, getAllServicesStatsHistory } from "./stats-db";
 import { initEventsDB, insertEvent, insertNotification, getEvents, getNotifications, type EventLogEntry, type NotificationLogEntry } from "./events-db";
 import type { Service, Stats, WSMessage, DiscordConfig, ContainerSettings, StatsRange } from "../shared/types";
@@ -206,7 +208,13 @@ app.get("/api/init", async (c) => {
   // the dashboard. The first regular poll (within ~3s) populates via WS.
   const projectAliases = loadProjectAliases();
   const projectColors = loadProjectColors();
-  return c.json({ services, connections, positions, stats: lastStats, projectAliases, projectColors });
+  // Update info: best-effort, never block init. If the check fails (offline,
+  // rate-limit), return null so the UI just doesn't show a notification.
+  let updateInfo = null;
+  try {
+    updateInfo = await getUpdateInfo(pkg.version);
+  } catch {}
+  return c.json({ services, connections, positions, stats: lastStats, projectAliases, projectColors, updateInfo });
 });
 
 // ── Server config (read by frontend to disable buttons for non-allowed paths) ──
@@ -692,6 +700,28 @@ app.delete("/api/project-colors/:project", (c) => {
   return c.json({ ok: true });
 });
 
+// ── Update info ──
+app.get("/api/update-info", async (c) => {
+  try {
+    const info = await getUpdateInfo(pkg.version);
+    return c.json(info);
+  } catch {
+    // Silent fallback — never error the client with this metadata call.
+    return c.json({
+      current: pkg.version,
+      latest: null,
+      updateAvailable: false,
+      releasesAhead: 0,
+      releaseUrl: null,
+      repoUrl: "https://github.com/RGJorge/ContainerFlow",
+      releaseNotes: null,
+      publishedAt: null,
+      deployMode: "unknown",
+      stars: null,
+    });
+  }
+});
+
 // ── Stats history ──
 const VALID_RANGES = new Set(["1h", "6h", "24h", "7d"]);
 

src/server/update-check.ts

@@ -0,0 +1,209 @@
+import Docker from "dockerode";
+
+const REPO = "RGJorge/ContainerFlow";
+const REPO_URL = `https://github.com/${REPO}`;
+const RELEASES_URL = `https://api.github.com/repos/${REPO}/releases?per_page=30`;
+const REPO_INFO_URL = `https://api.github.com/repos/${REPO}`;
+const CACHE_TTL_MS = 6 * 60 * 60 * 1000; // 6h
+
+export type DeployMode = "ghcr" | "source" | "unknown";
+
+export interface UpdateInfo {
+  current: string;
+  latest: string | null;
+  updateAvailable: boolean;
+  /** Number of stable releases between current and latest (e.g. 7 if you're on 0.1.0 and latest is 0.1.7). */
+  releasesAhead: number;
+  releaseUrl: string | null;
+  repoUrl: string;
+  releaseNotes: string | null;
+  publishedAt: string | null;
+  deployMode: DeployMode;
+  /** Current star count on the GitHub repo (null if fetch failed). */
+  stars: number | null;
+}
+
+interface CacheEntry {
+  data: UpdateInfo;
+  fetchedAt: number;
+}
+
+let cache: CacheEntry | null = null;
+let inFlight: Promise<UpdateInfo> | null = null;
+
+function parseSemver(v: string): [number, number, number] | null {
+  const m = v.replace(/^v/, "").match(/^(\d+)\.(\d+)\.(\d+)/);
+  if (!m) return null;
+  return [parseInt(m[1]!), parseInt(m[2]!), parseInt(m[3]!)];
+}
+
+function isNewer(latest: string, current: string): boolean {
+  const a = parseSemver(latest);
+  const b = parseSemver(current);
+  if (!a || !b) return false;
+  for (let i = 0; i < 3; i++) {
+    if (a[i]! > b[i]!) return true;
+    if (a[i]! < b[i]!) return false;
+  }
+  return false;
+}
+
+async function detectDeployMode(): Promise<DeployMode> {
+  try {
+    const hostname = process.env.HOSTNAME;
+    if (!hostname) return "unknown";
+    const docker = new Docker({ socketPath: "/var/run/docker.sock" });
+    const container = await docker.getContainer(hostname).inspect();
+    const image = container.Config?.Image || "";
+    if (image.startsWith("ghcr.io/rgjorge/containerflow")) return "ghcr";
+    if (image === "containerflow:local" || image.startsWith("containerflow:")) return "source";
+    return "unknown";
+  } catch {
+    return "unknown";
+  }
+}
+
+// Pull the first ~6 highlight lines from release notes. Captures both
+// bullet lists and ### / ## headings so any reasonable release format works.
+function summarizeReleaseNotes(body: string | undefined | null): string | null {
+  if (!body) return null;
+  const SKIP_HEADINGS = /^(what'?s new|changelog|full changelog|notes|highlights)$/i;
+  const lines = body.split(/\r?\n/);
+  const bullets: string[] = [];
+  for (const raw of lines) {
+    const line = raw.trim();
+    if (!line) continue;
+    // Bullet list items
+    if (line.startsWith("- ") || line.startsWith("* ")) {
+      bullets.push(stripMd(line.replace(/^[-*]\s+/, "")));
+    }
+    // Numbered list items
+    else if (/^\d+\.\s/.test(line)) {
+      bullets.push(stripMd(line.replace(/^\d+\.\s+/, "")));
+    }
+    // ## or ### headings (skip the generic "What's new" wrappers)
+    else if (line.startsWith("### ") || line.startsWith("## ")) {
+      const text = stripMd(line.replace(/^#+\s+/, ""));
+      if (!SKIP_HEADINGS.test(text)) bullets.push(text);
+    }
+    if (bullets.length >= 15) break;
+  }
+  return bullets.length > 0 ? bullets.join("\n") : null;
+}
+
+function stripMd(s: string): string {
+  return s
+    .replace(/`([^`]+)`/g, "$1")            // inline code
+    .replace(/\*\*([^*]+)\*\*/g, "$1")      // bold
+    .replace(/\*([^*]+)\*/g, "$1")          // italic
+    .replace(/\[([^\]]+)\]\([^)]+\)/g, "$1") // links → text
+    .trim();
+}
+
+function emptyInfo(currentVersion: string, deployMode: DeployMode, stars: number | null = null): UpdateInfo {
+  return {
+    current: currentVersion,
+    latest: null,
+    updateAvailable: false,
+    releasesAhead: 0,
+    releaseUrl: null,
+    repoUrl: REPO_URL,
+    releaseNotes: null,
+    publishedAt: null,
+    deployMode,
+    stars,
+  };
+}
+
+async function fetchStars(currentVersion: string): Promise<number | null> {
+  try {
+    const res = await fetch(REPO_INFO_URL, {
+      headers: {
+        "Accept": "application/vnd.github+json",
+        "User-Agent": `ContainerFlow/${currentVersion}`,
+      },
+      signal: AbortSignal.timeout(5000),
+    });
+    if (!res.ok) return null;
+    const data = (await res.json()) as { stargazers_count?: number };
+    return typeof data.stargazers_count === "number" ? data.stargazers_count : null;
+  } catch {
+    return null;
+  }
+}
+
+async function fetchLatest(currentVersion: string): Promise<UpdateInfo> {
+  const [deployMode, stars] = await Promise.all([detectDeployMode(), fetchStars(currentVersion)]);
+  try {
+    const res = await fetch(RELEASES_URL, {
+      headers: {
+        "Accept": "application/vnd.github+json",
+        "User-Agent": `ContainerFlow/${currentVersion}`,
+      },
+      signal: AbortSignal.timeout(5000),
+    });
+    if (!res.ok) return emptyInfo(currentVersion, deployMode, stars);
+
+    const releases = (await res.json()) as Array<{
+      tag_name?: string;
+      html_url?: string;
+      body?: string;
+      published_at?: string;
+      prerelease?: boolean;
+      draft?: boolean;
+    }>;
+    if (!Array.isArray(releases) || releases.length === 0) {
+      return emptyInfo(currentVersion, deployMode, stars);
+    }
+
+    // Stable releases only (no drafts, no prereleases). GitHub returns them
+    // sorted newest first, which is what we want for `latest`.
+    const stable = releases.filter((r) => !r.prerelease && !r.draft && r.tag_name);
+    if (stable.length === 0) return emptyInfo(currentVersion, deployMode, stars);
+
+    const latestRelease = stable[0]!;
+    const latest = latestRelease.tag_name!.replace(/^v/, "");
+    const updateAvailable = isNewer(latest, currentVersion);
+
+    // How many stable releases are strictly newer than what the user is running?
+    let releasesAhead = 0;
+    if (updateAvailable) {
+      for (const r of stable) {
+        const v = r.tag_name!.replace(/^v/, "");
+        if (isNewer(v, currentVersion)) releasesAhead++;
+      }
+    }
+
+    return {
+      current: currentVersion,
+      latest,
+      updateAvailable,
+      releasesAhead,
+      releaseUrl: latestRelease.html_url || `${REPO_URL}/releases/tag/${latestRelease.tag_name}`,
+      repoUrl: REPO_URL,
+      releaseNotes: summarizeReleaseNotes(latestRelease.body),
+      publishedAt: latestRelease.published_at || null,
+      deployMode,
+      stars,
+    };
+  } catch {
+    return emptyInfo(currentVersion, deployMode, stars);
+  }
+}
+
+export async function getUpdateInfo(currentVersion: string): Promise<UpdateInfo> {
+  const now = Date.now();
+  if (cache && now - cache.fetchedAt < CACHE_TTL_MS) return cache.data;
+  if (inFlight) return inFlight;
+  inFlight = fetchLatest(currentVersion)
+    .then((data) => {
+      cache = { data, fetchedAt: Date.now() };
+      inFlight = null;
+      return data;
+    })
+    .catch((err) => {
+      inFlight = null;
+      throw err;
+    });
+  return inFlight;
+}

src/shared/types.ts

@@ -131,6 +131,21 @@ export interface ServerConfig {
   restrictedMode: boolean;
 }
 
+export type DeployMode = "ghcr" | "source" | "unknown";
+
+export interface UpdateInfo {
+  current: string;
+  latest: string | null;
+  updateAvailable: boolean;
+  releasesAhead: number;
+  releaseUrl: string | null;
+  repoUrl: string;
+  releaseNotes: string | null;
+  publishedAt: string | null;
+  deployMode: DeployMode;
+  stars: number | null;
+}
+
 export interface EventLogEntry {
   id: number;
   timestamp: number;