Merge pull request 'feat: add host ping endpoint and automatic reconnection UI for disconnected terminals' (#22) from v1.2.2 into main

Reviewed-on: http://git.jdbnet.co.uk/jamie/ssh/pulls/22

app.py

@@ -4,6 +4,7 @@ SSH web client — Flask backend: auth, MariaDB, encrypted identities, WebSocket
 from __future__ import annotations
 
 import os
+import socket
 
 if os.getenv("GEVENT_MONKEY_PATCH", "").lower() in ("1", "true", "yes"):
     from gevent import monkey
@@ -164,6 +165,13 @@ def init_db():
       CONSTRAINT fk_host_tags_tag FOREIGN KEY (tag_id)
         REFERENCES ssh_tags(id) ON DELETE CASCADE
     );
+    CREATE TABLE IF NOT EXISTS ssh_snippets (
+      id INT AUTO_INCREMENT PRIMARY KEY,
+      label VARCHAR(255) NOT NULL,
+      command TEXT NOT NULL,
+      created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+      updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+    );
     """
     with db_cursor() as (_, cur):
         for stmt in ddl.split(";"):
@@ -876,7 +884,13 @@ def _connect_with_jump_chain(host_id: int) -> tuple[paramiko.SSHClient, paramiko
     raise RuntimeError("failed to build jump chain")
 
 
+def is_audit_log_enabled() -> bool:
+    return os.getenv("ENABLE_AUDIT_LOG", "true").lower() in ("1", "true", "yes")
+
+
 def _insert_connection_audit(host_row: dict[str, Any]) -> int | None:
+    if not is_audit_log_enabled():
+        return None
     try:
         with db_cursor() as (_, cur):
             cur.execute(
@@ -957,9 +971,10 @@ def api_logout():
 @app.route("/api/me", methods=["GET"])
 def api_me():
     version = app.config.get("VERSION", "unknown")
+    audit_enabled = is_audit_log_enabled()
     if session.get("logged_in"):
-        return jsonify({"logged_in": True, "app_version": version})
-    return jsonify({"logged_in": False, "app_version": version})
+        return jsonify({"logged_in": True, "app_version": version, "audit_log_enabled": audit_enabled})
+    return jsonify({"logged_in": False, "app_version": version, "audit_log_enabled": audit_enabled})
 
 
 @app.route("/api/identities", methods=["GET"])
@@ -1103,6 +1118,80 @@ def delete_identity(iid: int):
     return jsonify({"ok": True})
 
 
+@app.route("/api/snippets", methods=["GET"])
+@require_auth("read:hosts")
+def list_snippets():
+    with db_cursor() as (_, cur):
+        cur.execute("SELECT id, label, command, created_at, updated_at FROM ssh_snippets ORDER BY label ASC")
+        rows = cur.fetchall()
+    return jsonify({"items": rows})
+
+
+@app.route("/api/snippets", methods=["POST"])
+@require_auth("write:hosts")
+def create_snippet():
+    req = request.get_json()
+    if not req:
+        return jsonify({"error": "invalid json"}), 400
+    label = (req.get("label") or "").strip()
+    command = req.get("command") or ""
+    if not label or not command:
+        return jsonify({"error": "label and command required"}), 400
+    with db_cursor() as (_, cur):
+        cur.execute(
+            "INSERT INTO ssh_snippets (label, command) VALUES (%s, %s)",
+            (label, command),
+        )
+        sid = cur.lastrowid
+    return jsonify({"id": sid}), 201
+
+
+@app.route("/api/snippets/<int:sid>", methods=["PATCH"])
+@require_auth("write:hosts")
+def update_snippet(sid: int):
+    req = request.get_json()
+    if not req:
+        return jsonify({"error": "invalid json"}), 400
+    
+    updates = []
+    args = []
+    if "label" in req:
+        label = (req["label"] or "").strip()
+        if not label:
+            return jsonify({"error": "label cannot be empty"}), 400
+        updates.append("label = %s")
+        args.append(label)
+    if "command" in req:
+        cmd = req["command"] or ""
+        if not cmd:
+            return jsonify({"error": "command cannot be empty"}), 400
+        updates.append("command = %s")
+        args.append(cmd)
+    
+    if not updates:
+        return jsonify({"ok": True})
+    
+    args.append(sid)
+    with db_cursor() as (_, cur):
+        cur.execute(
+            f"UPDATE ssh_snippets SET {', '.join(updates)} WHERE id = %s",
+            tuple(args),
+        )
+        if cur.rowcount == 0:
+            return jsonify({"error": "not found"}), 404
+    return jsonify({"ok": True})
+
+
+@app.route("/api/snippets/<int:sid>", methods=["DELETE"])
+@require_auth("write:hosts")
+def delete_snippet(sid: int):
+    with db_cursor() as (_, cur):
+        cur.execute("DELETE FROM ssh_snippets WHERE id = %s", (sid,))
+        if cur.rowcount == 0:
+            return jsonify({"error": "not found"}), 404
+    return jsonify({"ok": True})
+
+
 def _host_select_sql(extra_where: str = "") -> str:
     return f"""
             SELECT h.id, h.folder_id, h.label, h.hostname, h.port, h.identity_id, h.jump_host_id,
@@ -1323,6 +1412,26 @@ def list_hosts():
     return jsonify({"items": rows})
 
 
+@app.route("/api/hosts/<int:hid>/ping", methods=["GET"])
+@require_auth("read:hosts")
+def ping_host(hid: int):
+    with db_cursor() as (_, cur):
+        cur.execute("SELECT hostname, port FROM ssh_hosts WHERE id = %s", (hid,))
+        row = cur.fetchone()
+    if not row:
+        return jsonify({"error": "not found"}), 404
+    
+    up = False
+    try:
+        with socket.create_connection((row["hostname"], row["port"]), timeout=2.0):
+            up = True
+    except Exception:
+        pass
+
+    return jsonify({"up": up})
+
+
+
 @app.route("/api/tags", methods=["GET"])
 @require_auth("read:hosts")
 def list_tags():

frontend/src/App.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
-import { onMounted, ref } from "vue";
-import { Folder, Pencil, Trash2, Radio } from "lucide-vue-next";
+import { onMounted, onUnmounted, ref } from "vue";
+import { Folder, Pencil, Trash2, Radio, ChevronDown } from "lucide-vue-next";
 import {
   api,
   type HostRow,
@@ -9,10 +9,12 @@ import {
   type ConnectionAuditRow,
   type ApiKeyRow,
   type ApiKeyScopeDef,
+  type SnippetRow,
 } from "@/api";
 import LoginForm from "@/components/LoginForm.vue";
 import TabContent from "@/components/TabContent.vue";
 import TagInput from "@/components/TagInput.vue";
+import SnippetForm from "@/components/SnippetForm.vue";
 
 interface TabItem {
   id: string;
@@ -23,6 +25,7 @@ interface TabItem {
 const loggedIn = ref(false);
 const checking = ref(true);
 const appVersion = ref("unknown");
+const auditLogEnabled = ref(true);
 const identities = ref<IdentityRow[]>([]);
 const allHosts = ref<HostRow[]>([]);
 const allFolders = ref<FolderRow[]>([]);
@@ -53,6 +56,79 @@ function handleBroadcast(data: string, sourceId: string) {
   }
 }
 
+const snippets = ref<SnippetRow[]>([]);
+const showSnippetsMenu = ref(false);
+const showSnippetForm = ref(false);
+const editingSnippet = ref<SnippetRow | null>(null);
+const snippetsButtonRef = ref<HTMLElement | null>(null);
+const snippetsMenuRef = ref<HTMLElement | null>(null);
+
+function closeSnippetsMenu(e: MouseEvent) {
+  if (
+    showSnippetsMenu.value &&
+    !snippetsButtonRef.value?.contains(e.target as Node) &&
+    !snippetsMenuRef.value?.contains(e.target as Node)
+  ) {
+    showSnippetsMenu.value = false;
+  }
+}
+
+onMounted(() => {
+  document.addEventListener("click", closeSnippetsMenu);
+});
+
+onUnmounted(() => {
+  document.removeEventListener("click", closeSnippetsMenu);
+});
+
+async function loadSnippets() {
+  try {
+    snippets.value = await api.listSnippets();
+  } catch (err: any) {
+    loadErr.value = err.message;
+  }
+}
+
+function runSnippet(command: string) {
+  showSnippetsMenu.value = false;
+  const targetPanes = broadcastMode.value ? activePanes.value : [activePanes.value[0]];
+  for (const paneId of targetPanes) {
+    if (paneId && tabRefs.value[paneId]) {
+      tabRefs.value[paneId].sendData(command + "\r");
+    }
+  }
+}
+
+async function saveSnippet(data: { label: string; command: string }) {
+  try {
+    if (editingSnippet.value) {
+      await api.updateSnippet(editingSnippet.value.id, data);
+    } else {
+      await api.createSnippet(data);
+    }
+    showSnippetForm.value = false;
+    await loadSnippets();
+  } catch (err: any) {
+    alert(err.message);
+  }
+}
+
+async function deleteSnippet(id: number) {
+  if (!confirm("Are you sure you want to delete this snippet?")) return;
+  try {
+    await api.deleteSnippet(id);
+    await loadSnippets();
+  } catch (err: any) {
+    alert(err.message);
+  }
+}
+
+function openEditSnippet(s?: SnippetRow) {
+  showSnippetsMenu.value = false;
+  editingSnippet.value = s || null;
+  showSnippetForm.value = true;
+}
+
 function onTabDragStart(id: string) {
   draggedTabId.value = id;
 }
@@ -255,6 +331,7 @@ async function refreshData() {
     allHosts.value = await api.listHosts();
     allFolders.value = await api.listFoldersFlat();
     allTags.value = await api.listTags();
+    await loadSnippets();
     if (!hostForm.value.identity_id && identities.value.length) {
       hostForm.value.identity_id = identities.value[0].id;
     }
@@ -271,6 +348,9 @@ onMounted(async () => {
     if (m.app_version) {
       appVersion.value = m.app_version;
     }
+    if (m.audit_log_enabled !== undefined) {
+      auditLogEnabled.value = m.audit_log_enabled;
+    }
     if (loggedIn.value) await refreshData();
   } catch {
     loggedIn.value = false;
@@ -773,6 +853,59 @@ async function deleteIdentityRow(id: number) {
             Broadcast
           </span>
         </button>
+        <div class="relative hidden md:block">
+          <button
+            ref="snippetsButtonRef"
+            type="button"
+            class="rounded-lg px-3 py-1.5 text-xs text-slate-400 hover:bg-slate-800 hover:text-white inline-flex items-center gap-1"
+            @click="showSnippetsMenu = !showSnippetsMenu"
+          >
+            Snippets
+            <ChevronDown class="h-3 w-3" />
+          </button>
+          <div
+            v-if="showSnippetsMenu"
+            ref="snippetsMenuRef"
+            class="absolute right-0 top-full mt-2 w-64 rounded-xl border border-slate-700 bg-surface shadow-xl z-50 overflow-hidden"
+          >
+            <div class="max-h-64 overflow-y-auto p-1">
+              <div v-if="snippets.length === 0" class="p-3 text-center text-xs text-slate-500">
+                No snippets saved.
+              </div>
+              <div
+                v-for="s in snippets"
+                :key="s.id"
+                class="flex items-center justify-between group rounded-lg px-2 py-1.5 hover:bg-slate-800"
+              >
+                <button
+                  type="button"
+                  class="flex-1 text-left text-sm text-white truncate"
+                  @click="runSnippet(s.command)"
+                  :title="s.command"
+                >
+                  {{ s.label }}
+                </button>
+                <div class="flex items-center gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
+                  <button type="button" class="text-slate-400 hover:text-white p-1" @click="openEditSnippet(s)">
+                    <Pencil class="h-3 w-3" />
+                  </button>
+                  <button type="button" class="text-red-400 hover:text-red-300 p-1" @click="deleteSnippet(s.id)">
+                    <Trash2 class="h-3 w-3" />
+                  </button>
+                </div>
+              </div>
+            </div>
+            <div class="border-t border-slate-700 p-1">
+              <button
+                type="button"
+                class="w-full rounded-lg px-2 py-1.5 text-left text-xs text-slate-400 hover:bg-slate-800 hover:text-white"
+                @click="openEditSnippet()"
+              >
+                + Add new snippet...
+              </button>
+            </div>
+          </div>
+        </div>
         <button
           type="button"
           class="hidden rounded-lg px-3 py-1.5 text-xs md:inline-flex"
@@ -789,6 +922,7 @@ async function deleteIdentityRow(id: number) {
           API keys
         </button>
         <button
+          v-if="auditLogEnabled"
           type="button"
           class="hidden rounded-lg px-3 py-1.5 text-xs text-slate-400 hover:bg-slate-800 hover:text-white md:inline-flex"
           @click="openAuditLog"
@@ -1117,6 +1251,13 @@ async function deleteIdentityRow(id: number) {
       </main>
     </div>
 
+    <SnippetForm
+      v-if="showSnippetForm"
+      :snippet="editingSnippet"
+      @save="saveSnippet"
+      @cancel="showSnippetForm = false"
+    />
+
     <div
       v-if="showApiKeys"
       class="fixed inset-0 z-50 flex items-center justify-center bg-black/60 p-4"

frontend/src/api.ts

@@ -21,7 +21,7 @@ function browseParams(folderId: number | null, q: string): string {
 }
 
 export const api = {
-  async me(): Promise<{ logged_in: boolean; app_version?: string }> {
+  async me(): Promise<{ logged_in: boolean; app_version?: string; audit_log_enabled?: boolean }> {
     const res = await fetch("/api/me", { credentials: "include" });
     return handle(res);
   },
@@ -65,6 +65,11 @@ export const api = {
     return d.items;
   },
 
+  async pingHost(id: number): Promise<{ up: boolean }> {
+    const res = await fetch(`/api/hosts/${id}/ping`, { credentials: "include" });
+    return handle<{ up: boolean }>(res);
+  },
+
   async listTags(): Promise<string[]> {
     const res = await fetch("/api/tags", { credentials: "include" });
     const d = await handle<{ items: string[] }>(res);
@@ -188,6 +193,43 @@ export const api = {
     await handle(res);
   },
 
+  async listSnippets(): Promise<SnippetRow[]> {
+    const res = await fetch("/api/snippets", { credentials: "include" });
+    const d = await handle<{ items: SnippetRow[] }>(res);
+    return d.items;
+  },
+
+  async createSnippet(body: Record<string, unknown>): Promise<{ id: number }> {
+    const res = await fetch("/api/snippets", {
+      method: "POST",
+      credentials: "include",
+      headers: jsonHeaders,
+      body: JSON.stringify(body),
+    });
+    return handle(res);
+  },
+
+  async updateSnippet(
+    id: number,
+    body: Partial<{ label: string; command: string }>,
+  ): Promise<void> {
+    const res = await fetch(`/api/snippets/${id}`, {
+      method: "PATCH",
+      credentials: "include",
+      headers: jsonHeaders,
+      body: JSON.stringify(body),
+    });
+    await handle(res);
+  },
+
+  async deleteSnippet(id: number): Promise<void> {
+    const res = await fetch(`/api/snippets/${id}`, {
+      method: "DELETE",
+      credentials: "include",
+    });
+    await handle(res);
+  },
+
   async listConnectionAudit(limit = 200, daysBack?: number): Promise<ConnectionAuditRow[]> {
     const q = new URLSearchParams({ limit: String(limit) });
     if (daysBack !== undefined) {
@@ -281,16 +323,41 @@ export const api = {
     await handle(res);
   },
 
-  async sftpUpload(connId: string, path: string, file: File): Promise<void> {
+  async sftpUpload(
+    connId: string,
+    path: string,
+    file: File,
+    onProgress?: (loaded: number, total: number) => void
+  ): Promise<void> {
     const fd = new FormData();
     fd.set("path", path);
     fd.set("file", file);
-    const res = await fetch(`/api/sftp/${connId}/upload`, {
-      method: "POST",
-      credentials: "include",
-      body: fd,
+    return new Promise((resolve, reject) => {
+      const xhr = new XMLHttpRequest();
+      xhr.open("POST", `/api/sftp/${connId}/upload`);
+      xhr.withCredentials = true;
+      if (onProgress) {
+        xhr.upload.onprogress = (e) => {
+          if (e.lengthComputable) {
+            onProgress(e.loaded, e.total);
+          }
+        };
+      }
+      xhr.onload = () => {
+        if (xhr.status === 401) return reject(new Error("unauthorized"));
+        let data: any = {};
+        try {
+          data = JSON.parse(xhr.responseText);
+        } catch (e) {}
+        if (xhr.status >= 200 && xhr.status < 300) {
+          resolve();
+        } else {
+          reject(new Error(data.error || xhr.statusText));
+        }
+      };
+      xhr.onerror = () => reject(new Error("Network Error"));
+      xhr.send(fd);
     });
-    await handle(res);
   },
 
   sftpDownloadUrl(connId: string, path: string): string {
@@ -327,6 +394,12 @@ export interface IdentityRow {
   auth_type: string;
 }
 
+export interface SnippetRow {
+  id: number;
+  label: string;
+  command: string;
+}
+
 export interface SftpEntry {
   filename: string;
   st_mode: number;

frontend/src/components/SftpPanel.vue

@@ -11,6 +11,7 @@ const err = ref("");
 const busy = ref(false);
 const renameTarget = ref<SftpEntry | null>(null);
 const newName = ref("");
+const uploadProgress = ref<number | null>(null);
 
 function isDir(m: number): boolean {
   return (m & 0o170000) === 0o040000;
@@ -66,11 +67,16 @@ async function onUpload(ev: Event) {
   input.value = "";
   if (!file) return;
   err.value = "";
+  uploadProgress.value = 0;
   try {
-    await api.sftpUpload(props.connId, path.value, file);
+    await api.sftpUpload(props.connId, path.value, file, (loaded, total) => {
+      uploadProgress.value = Math.round((loaded / total) * 100);
+    });
     await load();
   } catch (e) {
     err.value = e instanceof Error ? e.message : "Upload failed";
+  } finally {
+    uploadProgress.value = null;
   }
 }
 
@@ -186,7 +192,19 @@ function fmtSize(n: number): string {
     </div>
     <div class="min-h-0 flex-1 overflow-auto p-2">
       <p v-if="err" class="mb-2 text-xs text-red-400">{{ err }}</p>
-      <p v-if="busy" class="text-xs text-slate-500">Loading…</p>
+      <div v-if="uploadProgress !== null" class="mb-2 space-y-1">
+        <div class="flex justify-between text-[10px] text-slate-400">
+          <span>Uploading...</span>
+          <span>{{ uploadProgress }}%</span>
+        </div>
+        <div class="h-1.5 w-full overflow-hidden rounded-full bg-slate-800">
+          <div
+            class="h-full bg-accent transition-all duration-200"
+            :style="{ width: uploadProgress + '%' }"
+          ></div>
+        </div>
+      </div>
+      <p v-else-if="busy" class="text-xs text-slate-500">Loading…</p>
       <ul v-else class="space-y-0.5">
         <li
           v-for="e in entries"

frontend/src/components/SnippetForm.vue

@@ -0,0 +1,89 @@
+<script setup lang="ts">
+import { ref } from "vue";
+import type { SnippetRow } from "@/api";
+
+const props = defineProps<{
+  snippet?: SnippetRow | null;
+}>();
+
+const emit = defineEmits<{
+  (e: "save", data: { label: string; command: string }): void;
+  (e: "cancel"): void;
+}>();
+
+const label = ref(props.snippet?.label || "");
+const command = ref(props.snippet?.command || "");
+
+function submit() {
+  if (!label.value.trim() || !command.value.trim()) return;
+  emit("save", {
+    label: label.value.trim(),
+    command: command.value.trim(),
+  });
+}
+</script>
+
+<template>
+  <div
+    class="fixed inset-0 z-50 flex items-center justify-center bg-black/50 p-4 backdrop-blur-sm"
+  >
+    <div
+      class="w-full max-w-md rounded-xl border border-slate-700 bg-surface shadow-2xl"
+    >
+      <div class="flex items-center justify-between border-b border-slate-800 p-4">
+        <h2 class="text-lg font-semibold text-white">
+          {{ snippet ? "Edit snippet" : "Add snippet" }}
+        </h2>
+        <button
+          type="button"
+          class="text-slate-400 hover:text-white"
+          @click="emit('cancel')"
+        >
+          &times;
+        </button>
+      </div>
+      <form class="space-y-4 p-4" @submit.prevent="submit">
+        <div>
+          <label class="mb-1 block text-sm font-medium text-slate-300">
+            Label
+          </label>
+          <input
+            v-model="label"
+            type="text"
+            required
+            class="w-full rounded-lg border border-slate-700 bg-surface-overlay px-3 py-2 text-sm text-white placeholder:text-slate-500 focus:border-accent focus:outline-none focus:ring-1 focus:ring-accent"
+            placeholder="e.g. Docker logs"
+            autocomplete="off"
+          />
+        </div>
+        <div>
+          <label class="mb-1 block text-sm font-medium text-slate-300">
+            Command
+          </label>
+          <textarea
+            v-model="command"
+            required
+            rows="3"
+            class="w-full rounded-lg border border-slate-700 bg-surface-overlay px-3 py-2 text-sm font-mono text-white placeholder:text-slate-500 focus:border-accent focus:outline-none focus:ring-1 focus:ring-accent"
+            placeholder="docker compose logs -f"
+          />
+        </div>
+        <div class="flex justify-end gap-2 pt-2">
+          <button
+            type="button"
+            class="rounded-lg px-4 py-2 text-sm font-medium text-slate-300 hover:text-white"
+            @click="emit('cancel')"
+          >
+            Cancel
+          </button>
+          <button
+            type="submit"
+            class="rounded-lg bg-accent px-4 py-2 text-sm font-medium text-black hover:bg-[#16966b]"
+          >
+            Save snippet
+          </button>
+        </div>
+      </form>
+    </div>
+  </div>
+</template>

frontend/src/components/TabContent.vue

@@ -6,6 +6,7 @@ import {
   watch,
   nextTick,
 } from "vue";
+import { api } from "@/api";
 import { Terminal } from "@xterm/xterm";
 import { FitAddon } from "@xterm/addon-fit";
 import "@xterm/xterm/css/xterm.css";
@@ -32,12 +33,14 @@ defineExpose({
 const termEl = ref<HTMLElement | null>(null);
 const status = ref("Connecting…");
 const connId = ref<string | null>(null);
+const serverBackOnline = ref(false);
 
 let ws: WebSocket | null = null;
 let term: Terminal | null = null;
 let fit: FitAddon | null = null;
 let ro: ResizeObserver | null = null;
 let visibilityHandler: (() => void) | null = null;
+let pingInterval: number | null = null;
 
 function wsUrl(hostId: number): string {
   const proto = location.protocol === "https:" ? "wss:" : "ws:";
@@ -85,6 +88,71 @@ function isControlMessage(raw: string): boolean {
   return false;
 }
 
+function connectWs() {
+  serverBackOnline.value = false;
+  if (pingInterval) {
+    clearInterval(pingInterval);
+    pingInterval = null;
+  }
+  if (ws) {
+    ws.close();
+  }
+
+  ws = new WebSocket(wsUrl(props.hostId));
+  ws.binaryType = "arraybuffer";
+
+  ws.onopen = () => {
+    status.value = "Handshaking…";
+    sendResize();
+  };
+
+  ws.onmessage = (ev) => {
+    if (!term) return;
+    if (typeof ev.data === "string") {
+      if (isControlMessage(ev.data)) return;
+      term.write(ev.data);
+      return;
+    }
+    const u8 = new Uint8Array(ev.data as ArrayBuffer);
+    term.write(new TextDecoder().decode(u8));
+  };
+
+  ws.onerror = () => {
+    status.value = "WebSocket error";
+  };
+
+  ws.onclose = () => {
+    if (!connId.value) {
+      status.value = "Disconnected";
+    } else {
+      status.value = "Session ended";
+    }
+    
+    pingInterval = window.setInterval(async () => {
+      try {
+        const { up } = await api.pingHost(props.hostId);
+        if (up) {
+          if (pingInterval) {
+            clearInterval(pingInterval);
+            pingInterval = null;
+          }
+          serverBackOnline.value = true;
+        }
+      } catch (err) {
+        // ignore
+      }
+    }, 5000);
+  };
+}
+
+function reconnect() {
+  term?.clear();
+  term?.focus();
+  connId.value = null;
+  status.value = "Connecting…";
+  connectWs();
+}
+
 onMounted(async () => {
   await nextTick();
   if (!termEl.value) return;
@@ -121,36 +189,7 @@ onMounted(async () => {
   ro = new ResizeObserver(() => fitAndResize());
   ro.observe(termEl.value);
 
-  ws = new WebSocket(wsUrl(props.hostId));
-  ws.binaryType = "arraybuffer";
-
-  ws.onopen = () => {
-    status.value = "Handshaking…";
-    sendResize();
-  };
-
-  ws.onmessage = (ev) => {
-    if (!term) return;
-    if (typeof ev.data === "string") {
-      if (isControlMessage(ev.data)) return;
-      term.write(ev.data);
-      return;
-    }
-    const u8 = new Uint8Array(ev.data as ArrayBuffer);
-    term.write(new TextDecoder().decode(u8));
-  };
-
-  ws.onerror = () => {
-    status.value = "WebSocket error";
-  };
-
-  ws.onclose = () => {
-    if (!connId.value) {
-      status.value = "Disconnected";
-    } else {
-      status.value = "Session ended";
-    }
-  };
+  connectWs();
 
   visibilityHandler = () => {
     if (document.visibilityState === "visible") {
@@ -162,6 +201,10 @@ onMounted(async () => {
 });
 
 onUnmounted(() => {
+  if (pingInterval) {
+    clearInterval(pingInterval);
+    pingInterval = null;
+  }
   if (visibilityHandler) {
     document.removeEventListener("visibilitychange", visibilityHandler);
     visibilityHandler = null;
@@ -197,6 +240,18 @@ watch(
       >
         {{ status }}
       </div>
+      <div
+        v-if="serverBackOnline"
+        class="absolute bottom-4 right-4 z-20 flex items-center gap-3 rounded bg-slate-800 px-4 py-3 text-sm shadow-lg border border-slate-700"
+      >
+        <span class="text-slate-200">Server is back online</span>
+        <button
+          @click="reconnect"
+          class="rounded bg-emerald-600 px-3 py-1.5 font-medium text-white hover:bg-emerald-500 transition-colors"
+        >
+          Reconnect
+        </button>
+      </div>
       <div
         ref="termEl"
         class="h-full min-h-[320px] rounded-lg border border-slate-800 bg-[#0d1117] p-1"