diff --git a/src/uwudash_mk3/static/app.js b/src/uwudash_mk3/static/app.js
new file mode 100644
index 0000000..f32bc0f
--- /dev/null
+++ b/src/uwudash_mk3/static/app.js
@@ -0,0 +1,272 @@
+/* UwuDash MK3 - dashboard front end. */
+"use strict";
+
+const el = {
+  serviceList: document.getElementById("service-list"),
+  viewer: document.getElementById("viewer"),
+  viewerTitle: document.getElementById("viewer-title"),
+  viewerUrl: document.getElementById("viewer-url"),
+  viewerFrame: document.getElementById("viewer-frame"),
+  emptyState: document.getElementById("empty-state"),
+  emptyText: document.getElementById("empty-text"),
+  reloadBtn: document.getElementById("reload-btn"),
+  settings: document.getElementById("settings"),
+  settingsToggle: document.getElementById("settings-toggle"),
+  settingsClose: document.getElementById("settings-close"),
+  serviceTable: document.getElementById("service-table"),
+  form: document.getElementById("service-form"),
+  formTitle: document.getElementById("form-title"),
+  name: document.getElementById("f-name"),
+  url: document.getElementById("f-url"),
+  desc: document.getElementById("f-desc"),
+  icon: document.getElementById("f-icon"),
+  open: document.getElementById("f-open"),
+  headers: document.getElementById("f-headers"),
+  enabled: document.getElementById("f-enabled"),
+  formCancel: document.getElementById("form-cancel"),
+  toast: document.getElementById("toast"),
+};
+
+const state = { services: [], selected: null, editing: null };
+
+/* ---------------------------------------------------------------- helpers */
+const ESCAPES = { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" };
+
+function esc(value) {
+  return String(value ?? "").replace(/[&<>"']/g, (char) => ESCAPES[char]);
+}
+
+function toast(message, kind = "ok") {
+  el.toast.textContent = message;
+  el.toast.className = `toast ${kind}`;
+  el.toast.hidden = false;
+  clearTimeout(toast._timer);
+  toast._timer = setTimeout(() => { el.toast.hidden = true; }, 4000);
+}
+
+async function api(path, options = {}) {
+  const response = await fetch(path, {
+    ...options,
+    headers: { "Content-Type": "application/json", ...(options.headers || {}) },
+  });
+  if (!response.ok) {
+    let detail = response.statusText;
+    try {
+      const body = await response.json();
+      if (body.detail) detail = body.detail;
+    } catch (_) { /* keep statusText */ }
+    throw new Error(detail);
+  }
+  return response.status === 204 ? null : response.json();
+}
+
+function headersToText(headers) {
+  return Object.entries(headers || {}).map(([k, v]) => `${k}: ${v}`).join("\n");
+}
+
+function textToHeaders(text) {
+  const out = {};
+  for (const line of (text || "").split("\n")) {
+    const trimmed = line.trim();
+    if (!trimmed) continue;
+    const index = trimmed.indexOf(":");
+    if (index === 0) continue;
+    out[trimmed.slice(0, index).trim()] = trimmed.slice(index + 1).trim();
+  }
+  return out;
+}
+
+/* ---------------------------------------------------------------- rendering */
+function renderSidebar() {
+  el.serviceList.innerHTML = "";
+  if (!state.services.length) {
+    el.serviceList.innerHTML = '<p class="status">No services configured yet.</p>';
+    return;
+  }
+  for (const service of state.services) {
+    const button = document.createElement("button");
+    button.className =
+      "service-btn" +
+      (state.selected === service.id ? " active" : "") +
+      (service.enabled ? "" : " disabled");
+    button.title = service.url;
+    button.innerHTML =
+      `<span class="icon">${esc(service.icon || (service.name[0] || "?").toUpperCase())}</span>` +
+      `<span><span class="label">${esc(service.name)}</span>` +
+      `<span class="sub">${esc(service.description || service.origin)}</span></span>`;
+    button.addEventListener("click", () => openService(service));
+    el.serviceList.appendChild(button);
+  }
+}
+
+function renderTable() {
+  el.serviceTable.innerHTML = "";
+  if (!state.services.length) {
+    el.serviceTable.innerHTML = '<p class="status">No services yet - add one on the left.</p>';
+    return;
+  }
+  for (const service of state.services) {
+    const row = document.createElement("div");
+    row.className = "service-row";
+    row.innerHTML =
+      `<div class="meta"><strong>${esc(service.name)}</strong>` +
+      `<code>${esc(service.url)}</code>` +
+      `<span>${esc(service.description || "")}</span></div>` +
+      `<span class="status" data-status="${esc(service.id)}">${service.enabled ? "enabled" : "disabled"}</span>` +
+      `<button class="btn ghost" data-action="test" data-id="${esc(service.id)}">Test</button>` +
+      `<button class="btn ghost" data-action="edit" data-id="${esc(service.id)}">Edit</button>` +
+      `<button class="btn ghost" data-action="delete" data-id="${esc(service.id)}">Delete</button>`;
+    el.serviceTable.appendChild(row);
+  }
+}
+
+function findService(id) {
+  return state.services.find((s) => s.id === id);
+}
+
+/* ---------------------------------------------------------------- actions */
+function openService(service) {
+  state.selected = service.id;
+  renderSidebar();
+
+  if (!service.enabled) {
+    toast(`${service.name} is disabled`, "error");
+    return;
+  }
+
+  if (service.open_in === "newtab") {
+    window.open(service.proxy_path, "_blank");
+    el.settings.hidden = true;
+    el.viewerFrame.hidden = true;
+    el.viewerFrame.src = "";
+    el.reloadBtn.hidden = true;
+    el.emptyState.hidden = false;
+    el.emptyText.textContent = `${service.name} opened in a new tab (${service.proxy_path})`;
+    return;
+  }
+
+  el.settings.hidden = true;
+  el.viewer.hidden = false;
+  el.emptyState.hidden = true;
+  el.viewerFrame.hidden = false;
+  el.reloadBtn.hidden = false;
+  el.viewerTitle.textContent = service.name;
+  el.viewerUrl.textContent = service.proxy_path;
+  el.viewerFrame.src = service.proxy_path;
+}
+
+function showSettings() {
+  el.settings.hidden = false;
+  el.viewer.hidden = true;
+  el.viewerFrame.src = "";
+  renderTable();
+}
+
+function resetForm() {
+  state.editing = null;
+  el.formTitle.textContent = "Add service";
+  el.name.value = "";
+  el.url.value = "";
+  el.desc.value = "";
+  el.icon.value = "";
+  el.open.value = "iframe";
+  el.headers.value = "";
+  el.enabled.checked = true;
+}
+
+function fillForm(service) {
+  state.editing = service.id;
+  el.formTitle.textContent = `Edit ${service.name}`;
+  el.name.value = service.name;
+  el.url.value = service.url;
+  el.desc.value = service.description || "";
+  el.icon.value = service.icon || "";
+  el.open.value = service.open_in;
+  el.headers.value = headersToText(service.headers);
+  el.enabled.checked = service.enabled;
+}
+
+async function refresh() {
+  state.services = await api("/api/services");
+  renderSidebar();
+  renderTable();
+}
+
+async function saveService(event) {
+  event.preventDefault();
+  const payload = {
+    name: el.name.value.trim(),
+    url: el.url.value.trim(),
+    description: el.desc.value.trim(),
+    icon: el.icon.value.trim(),
+    open_in: el.open.value,
+    enabled: el.enabled.checked,
+    headers: textToHeaders(el.headers.value),
+  };
+  try {
+    const saved = state.editing
+      ? await api(`/api/services/${state.editing}`, { method: "PATCH", body: JSON.stringify(payload) })
+      : await api("/api/services", { method: "POST", body: JSON.stringify(payload) });
+    toast(state.editing ? `Updated ${saved.name}` : `Added ${saved.name}`);
+    resetForm();
+    await refresh();
+  } catch (error) {
+    toast(error.message, "error");
+  }
+}
+
+async function deleteService(id) {
+  const service = findService(id);
+  if (!service || !confirm(`Delete ${service.name}?`)) return;
+  try {
+    await api(`/api/services/${id}`, { method: "DELETE" });
+    if (state.selected === id) state.selected = null;
+    toast(`Deleted ${service.name}`);
+    await refresh();
+  } catch (error) {
+    toast(error.message, "error");
+  }
+}
+
+async function testService(id, statusEl) {
+  statusEl.textContent = "testing...";
+  try {
+    const health = await api(`/api/services/${id}/health`);
+    statusEl.textContent = health.reachable
+      ? `reachable (${health.status})`
+      : `unreachable: ${health.error || health.status}`;
+    statusEl.className = `status ${health.reachable ? "ok" : "bad"}`;
+  } catch (error) {
+    statusEl.textContent = error.message;
+    statusEl.className = "status bad";
+  }
+}
+
+/* ---------------------------------------------------------------- wiring */
+el.serviceTable.addEventListener("click", (event) => {
+  const button = event.target.closest("button[data-action]");
+  if (!button) return;
+  const id = button.dataset.id;
+  if (button.dataset.action === "edit") {
+    const service = findService(id);
+    if (service) fillForm(service);
+  } else if (button.dataset.action === "delete") {
+    deleteService(id);
+  } else if (button.dataset.action === "test") {
+    const statusEl = el.serviceTable.querySelector(`[data-status="${id}"]`);
+    testService(id, statusEl);
+  }
+});
+
+el.form.addEventListener("submit", saveService);
+el.formCancel.addEventListener("click", resetForm);
+el.settingsToggle.addEventListener("click", showSettings);
+el.settingsClose.addEventListener("click", () => {
+  el.settings.hidden = true;
+  el.viewer.hidden = false;
+});
+el.reloadBtn.addEventListener("click", () => {
+  if (el.viewerFrame.src) el.viewerFrame.src = el.viewerFrame.src;
+});
+
+refresh().catch((error) => toast(error.message, "error"));
diff --git a/src/uwudash_mk3/static/styles.css b/src/uwudash_mk3/static/styles.css
new file mode 100644
index 0000000..456c88c
--- /dev/null
+++ b/src/uwudash_mk3/static/styles.css
@@ -0,0 +1,191 @@
+:root {
+  --bg: #10131a;
+  --panel: #171c26;
+  --panel-2: #1f2532;
+  --border: #2a3242;
+  --fg: #e8edf5;
+  --muted: #8b96a8;
+  --accent: #4f8cff;
+  --success: #3fbf7f;
+  --error: #e0556b;
+  --warning: #d9a441;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    --bg: #f4f6fa;
+    --panel: #ffffff;
+    --panel-2: #eef2f7;
+    --border: #d5dde8;
+    --fg: #16202e;
+    --muted: #61708a;
+    --accent: #2f6fd0;
+  }
+}
+
+* { box-sizing: border-box; }
+
+[hidden] { display: none !important; }
+
+body {
+  margin: 0;
+  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
+  background: var(--bg);
+  color: var(--fg);
+  display: flex;
+  min-height: 100vh;
+}
+
+/* ---------------------------------------------------------------- sidebar */
+.sidebar {
+  width: 220px;
+  flex: 0 0 220px;
+  background: var(--panel);
+  border-right: 1px solid var(--border);
+  display: flex;
+  flex-direction: column;
+  padding: 16px 12px;
+}
+
+.brand { display: flex; align-items: baseline; gap: 8px; margin-bottom: 16px; }
+.brand-name { font-size: 18px; font-weight: 700; }
+.brand-sub { color: var(--muted); font-size: 12px; }
+
+.service-list { display: flex; flex-direction: column; gap: 8px; flex: 1; }
+
+.service-btn {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 10px 12px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  background: var(--panel-2);
+  color: var(--fg);
+  cursor: pointer;
+  text-align: left;
+  font: inherit;
+}
+.service-btn:hover { border-color: var(--accent); }
+.service-btn.active { border-color: var(--accent); background: var(--accent); color: #fff; }
+.service-btn .icon { font-size: 16px; }
+.service-btn .label { display: block; font-weight: 600; }
+.service-btn .sub { display: block; font-size: 11px; color: var(--muted); }
+.service-btn.disabled { opacity: 0.5; }
+
+.sidebar-foot { margin-top: 12px; }
+
+/* ------------------------------------------------------------------- main */
+.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
+
+.viewer { flex: 1; display: flex; flex-direction: column; min-height: 0; }
+.viewer-bar {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 16px;
+  border-bottom: 1px solid var(--border);
+  background: var(--panel);
+}
+.viewer-title { font-weight: 600; }
+.viewer-url { color: var(--muted); font-size: 12px; }
+.viewer-bar .btn { margin-left: auto; }
+
+#viewer-frame { flex: 1; width: 100%; border: 0; background: var(--bg); }
+
+.empty {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--muted);
+  padding: 40px;
+}
+
+/* --------------------------------------------------------------- settings */
+.settings { padding: 20px; }
+.settings-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
+.settings-head h1 { margin: 0; font-size: 20px; }
+.settings-head .btn { margin-left: auto; }
+
+.settings-grid {
+  display: grid;
+  grid-template-columns: 320px 1fr;
+  gap: 16px;
+  align-items: start;
+}
+
+.card {
+  background: var(--panel);
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  padding: 16px;
+}
+
+.form { display: flex; flex-direction: column; gap: 10px; }
+.form h2 { margin: 0 0 4px; font-size: 16px; }
+.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
+.form input, .form select, .form textarea {
+  font: inherit;
+  color: var(--fg);
+  background: var(--panel-2);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 8px 10px;
+}
+.form .checkbox { flex-direction: row; align-items: center; }
+.form-actions { display: flex; gap: 8px; margin-top: 6px; }
+
+.service-table { display: flex; flex-direction: column; gap: 10px; }
+.service-row {
+  display: grid;
+  grid-template-columns: 1fr auto auto auto;
+  gap: 12px;
+  align-items: center;
+  background: var(--panel);
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  padding: 12px 14px;
+}
+.service-row .meta { min-width: 0; }
+.service-row .meta strong { display: block; }
+.service-row .meta span { color: var(--muted); font-size: 12px; display: block; }
+.service-row .meta code { color: var(--muted); font-size: 12px; }
+
+.status { font-size: 12px; color: var(--muted); }
+.status.ok { color: var(--success); }
+.status.bad { color: var(--error); }
+
+/* ------------------------------------------------------------------ btns */
+.btn {
+  font: inherit;
+  padding: 8px 12px;
+  border-radius: 8px;
+  border: 1px solid var(--accent);
+  background: var(--accent);
+  color: #fff;
+  cursor: pointer;
+}
+.btn.ghost { background: transparent; color: var(--fg); border-color: var(--border); }
+.btn:hover { filter: brightness(1.1); }
+
+/* ----------------------------------------------------------------- toast */
+.toast {
+  position: fixed;
+  bottom: 16px;
+  right: 16px;
+  background: var(--panel);
+  border: 1px solid var(--border);
+  border-left: 3px solid var(--accent);
+  border-radius: 8px;
+  padding: 10px 14px;
+  max-width: 360px;
+  font-size: 13px;
+}
+.toast.error { border-left-color: var(--error); }
+.toast.ok { border-left-color: var(--success); }
+
+@media (max-width: 860px) {
+  .settings-grid { grid-template-columns: 1fr; }
+  .sidebar { width: 180px; flex-basis: 180px; }
+}
diff --git a/src/uwudash_mk3/templates/index.html b/src/uwudash_mk3/templates/index.html
new file mode 100644
index 0000000..dd84cc6
--- /dev/null
+++ b/src/uwudash_mk3/templates/index.html
@@ -0,0 +1,89 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <title>UwuDash MK3</title>
+    <link rel="stylesheet" href="/static/styles.css" />
+  </head>
+  <body>
+    <nav class="sidebar">
+      <div class="brand">
+        <span class="brand-name">UwuDash</span>
+        <span class="brand-sub">mk3</span>
+      </div>
+
+      <div class="service-list" id="service-list"></div>
+
+      <div class="sidebar-foot">
+        <button class="btn ghost" id="settings-toggle">Settings</button>
+      </div>
+    </nav>
+
+    <main class="main">
+      <section class="viewer" id="viewer">
+        <header class="viewer-bar">
+          <span class="viewer-title" id="viewer-title">Nothing selected</span>
+          <span class="viewer-url" id="viewer-url"></span>
+          <button class="btn ghost" id="reload-btn" hidden>Reload</button>
+        </header>
+        <iframe id="viewer-frame" title="Service view" hidden></iframe>
+        <div class="empty" id="empty-state">
+          <p id="empty-text">Pick a service from the sidebar, or add one in Settings.</p>
+        </div>
+      </section>
+
+      <section class="settings" id="settings" hidden>
+        <header class="settings-head">
+          <h1>Service settings</h1>
+          <button class="btn ghost" id="settings-close">Back to dashboard</button>
+        </header>
+
+        <div class="settings-grid">
+          <form id="service-form" class="card form" autocomplete="off">
+            <h2 id="form-title">Add service</h2>
+            <label>
+              Name
+              <input id="f-name" required maxlength="120" placeholder="Grafana" />
+            </label>
+            <label>
+              URL
+              <input id="f-url" required placeholder="http://localhost:3000" />
+            </label>
+            <label>
+              Description
+              <input id="f-desc" maxlength="500" placeholder="Metrics dashboards" />
+            </label>
+            <label>
+              Icon
+              <input id="f-icon" maxlength="8" placeholder="emoji or initials" />
+            </label>
+            <label>
+              Open as
+              <select id="f-open">
+                <option value="iframe">iframe</option>
+                <option value="newtab">new tab</option>
+              </select>
+            </label>
+            <label>
+              Extra headers (one per line, <code>Name: value</code>)
+              <textarea id="f-headers" rows="3" placeholder="Authorization: Bearer ..."></textarea>
+            </label>
+            <label class="checkbox">
+              <input type="checkbox" id="f-enabled" checked /> Enabled
+            </label>
+            <div class="form-actions">
+              <button type="submit" class="btn">Save</button>
+              <button type="button" class="btn ghost" id="form-cancel">Cancel</button>
+            </div>
+          </form>
+
+          <div class="service-table" id="service-table"></div>
+        </div>
+      </section>
+    </main>
+
+    <div class="toast" id="toast" hidden></div>
+    <script src="/static/app.js"></script>
+  </body>
+</html>