Add transaction rate and enhance chart tooltips

Added transaction-per-second (TPS) metric calculation to the TargetDetailPage and updated the chart to display it. Improved tooltip design and functionality for better readability, including dynamic metrics display and styled components.

.env.example

@@ -25,4 +25,5 @@ INIT_ADMIN_PASSWORD=ChangeMe123!
 
 # Frontend
 FRONTEND_PORT=5173
-VITE_API_URL=http://localhost:8000/api/v1
+# For reverse proxy + SSL prefer relative path to avoid mixed-content.
+VITE_API_URL=/api/v1

frontend/nginx.conf

@@ -5,6 +5,15 @@ server {
   root /usr/share/nginx/html;
   index index.html;
 
+  location /api/ {
+    proxy_pass http://backend:8000;
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+  }
+
   location / {
     try_files $uri $uri/ /index.html;
   }

frontend/src/App.jsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { Link, Navigate, Route, Routes, useLocation } from "react-router-dom";
+import { NavLink, Navigate, Route, Routes, useLocation } from "react-router-dom";
 import { useAuth } from "./state";
 import { LoginPage } from "./pages/LoginPage";
 import { DashboardPage } from "./pages/DashboardPage";
@@ -17,20 +17,36 @@ function Protected({ children }) {
 
 function Layout({ children }) {
   const { me, logout } = useAuth();
+  const navClass = ({ isActive }) => `nav-btn${isActive ? " active" : ""}`;
+
   return (
     <div className="shell">
       <aside className="sidebar">
         <h1>NexaPG</h1>
-        <nav>
+        <nav className="sidebar-nav">
-          <Link to="/">Dashboard</Link>
+          <NavLink to="/" end className={navClass}>
-          <Link to="/targets">Targets</Link>
+            <span className="nav-icon">DB</span>
-          <Link to="/query-insights">Query Insights</Link>
+            <span className="nav-label">Dashboard</span>
-          {me?.role === "admin" && <Link to="/admin/users">Admin</Link>}
+          </NavLink>
+          <NavLink to="/targets" className={navClass}>
+            <span className="nav-icon">TG</span>
+            <span className="nav-label">Targets</span>
+          </NavLink>
+          <NavLink to="/query-insights" className={navClass}>
+            <span className="nav-icon">QI</span>
+            <span className="nav-label">Query Insights</span>
+          </NavLink>
+          {me?.role === "admin" && (
+            <NavLink to="/admin/users" className={navClass}>
+              <span className="nav-icon">AD</span>
+              <span className="nav-label">Admin</span>
+            </NavLink>
+          )}
         </nav>
         <div className="profile">
           <div>{me?.email}</div>
           <div className="role">{me?.role}</div>
-          <button onClick={logout}>Logout</button>
+          <button className="logout-btn" onClick={logout}>Logout</button>
         </div>
       </aside>
       <main className="main">{children}</main>

frontend/src/api.js

@@ -1,4 +1,21 @@
-const API_URL = import.meta.env.VITE_API_URL || "http://localhost:8000/api/v1";
+function resolveApiUrl() {
+  const raw = (import.meta.env.VITE_API_URL || "").trim();
+  const fallback = "/api/v1";
+  if (!raw) return fallback;
+
+  try {
+    const parsed = new URL(raw, window.location.origin);
+    if (window.location.protocol === "https:" && parsed.protocol === "http:") {
+      // Avoid mixed-content when UI is served over HTTPS.
+      parsed.protocol = "https:";
+    }
+    return parsed.toString().replace(/\/$/, "");
+  } catch {
+    return fallback;
+  }
+}
+
+const API_URL = resolveApiUrl();
 
 export async function apiFetch(path, options = {}, tokens, onUnauthorized) {
   const headers = {

frontend/src/pages/LoginPage.jsx

@@ -5,8 +5,8 @@ import { useAuth } from "../state";
 export function LoginPage() {
   const { login } = useAuth();
   const navigate = useNavigate();
-  const [email, setEmail] = useState("admin@example.com");
+  const [email, setEmail] = useState("");
-  const [password, setPassword] = useState("ChangeMe123!");
+  const [password, setPassword] = useState("");
   const [error, setError] = useState("");
   const [loading, setLoading] = useState(false);
 
@@ -27,13 +27,29 @@ export function LoginPage() {
   return (
     <div className="login-wrap">
       <form className="card login-card" onSubmit={submit}>
-        <h2>Login</h2>
+        <div className="login-eyebrow">NexaPG Monitor</div>
-        <label>Email</label>
+        <h2>Willkommen zurück</h2>
-        <input value={email} onChange={(e) => setEmail(e.target.value)} />
+        <p className="login-subtitle">Melde dich an, um Monitoring und Query Insights zu öffnen.</p>
-        <label>Passwort</label>
+        <div className="input-shell">
-        <input type="password" value={password} onChange={(e) => setPassword(e.target.value)} />
+          <input
+            type="email"
+            placeholder="E-Mail"
+            value={email}
+            onChange={(e) => setEmail(e.target.value)}
+            autoComplete="username"
+          />
+        </div>
+        <div className="input-shell">
+          <input
+            type="password"
+            placeholder="Password"
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            autoComplete="current-password"
+          />
+        </div>
         {error && <p className="error">{error}</p>}
-        <button disabled={loading}>{loading ? "Bitte warten..." : "Einloggen"}</button>
+        <button className="login-cta" disabled={loading}>{loading ? "Bitte warten..." : "Einloggen"}</button>
       </form>
     </div>
   );

frontend/src/pages/TargetDetailPage.jsx

@@ -36,6 +36,24 @@ function formatSeconds(value) {
   return `${(value / 3600).toFixed(1)}h`;
 }
 
+function formatNumber(value, digits = 2) {
+  if (value === null || value === undefined || Number.isNaN(Number(value))) return "-";
+  return Number(value).toFixed(digits);
+}
+
+function MetricsTooltip({ active, payload, label }) {
+  if (!active || !payload || payload.length === 0) return null;
+  const row = payload[0]?.payload || {};
+  return (
+    <div className="chart-tooltip">
+      <div className="chart-tooltip-time">{label}</div>
+      <div className="chart-tooltip-item c1">connections: {formatNumber(row.connections, 0)}</div>
+      <div className="chart-tooltip-item c2">tps: {formatNumber(row.tps, 2)}</div>
+      <div className="chart-tooltip-item c3">cache: {formatNumber(row.cache, 2)}%</div>
+    </div>
+  );
+}
+
 async function loadMetric(targetId, metric, range, tokens, refresh) {
   const { from, to } = toQueryRange(range);
   return apiFetch(
@@ -54,6 +72,7 @@ export function TargetDetailPage() {
   const [locks, setLocks] = useState([]);
   const [activity, setActivity] = useState([]);
   const [overview, setOverview] = useState(null);
+  const [targetMeta, setTargetMeta] = useState(null);
   const [error, setError] = useState("");
   const [loading, setLoading] = useState(true);
 
@@ -62,19 +81,21 @@ export function TargetDetailPage() {
     (async () => {
       setLoading(true);
       try {
-        const [connections, xacts, cache, locksTable, activityTable, overviewData] = await Promise.all([
+        const [connections, xacts, cache, locksTable, activityTable, overviewData, targetInfo] = await Promise.all([
           loadMetric(id, "connections_total", range, tokens, refresh),
           loadMetric(id, "xacts_total", range, tokens, refresh),
           loadMetric(id, "cache_hit_ratio", range, tokens, refresh),
           apiFetch(`/targets/${id}/locks`, {}, tokens, refresh),
           apiFetch(`/targets/${id}/activity`, {}, tokens, refresh),
           apiFetch(`/targets/${id}/overview`, {}, tokens, refresh),
+          apiFetch(`/targets/${id}`, {}, tokens, refresh),
         ]);
         if (!active) return;
         setSeries({ connections, xacts, cache });
         setLocks(locksTable);
         setActivity(activityTable);
         setOverview(overviewData);
+        setTargetMeta(targetInfo);
         setError("");
       } catch (e) {
         if (active) setError(String(e.message || e));
@@ -88,13 +109,29 @@ export function TargetDetailPage() {
   }, [id, range, tokens, refresh]);
 
   const chartData = useMemo(
-    () =>
+    () => {
-      (series.connections || []).map((point, idx) => ({
+      const con = series.connections || [];
+      const xacts = series.xacts || [];
+      const cache = series.cache || [];
+      return con.map((point, idx) => {
+        const prev = xacts[idx - 1];
+        const curr = xacts[idx];
+        let tps = 0;
+        if (prev && curr) {
+          const dt = (new Date(curr.ts).getTime() - new Date(prev.ts).getTime()) / 1000;
+          const dx = (curr.value || 0) - (prev.value || 0);
+          if (dt > 0 && dx >= 0) {
+            tps = dx / dt;
+          }
+        }
+        return {
           ts: new Date(point.ts).toLocaleTimeString(),
           connections: point.value,
-        xacts: series.xacts?.[idx]?.value || 0,
+          tps,
-        cache: series.cache?.[idx]?.value || 0,
+          cache: (cache[idx]?.value || 0) * 100,
-      })),
+        };
+      });
+    },
     [series]
   );
 
@@ -107,7 +144,10 @@ export function TargetDetailPage() {
 
   return (
     <div>
-      <h2>Target Detail #{id}</h2>
+      <h2>
+        Target Detail {targetMeta?.name || `#${id}`}
+        {targetMeta?.dbname ? ` (${targetMeta.dbname})` : ""}
+      </h2>
       {overview && (
         <div className="card">
           <h3>Database Overview</h3>
@@ -121,7 +161,10 @@ export function TargetDetailPage() {
               <span>Uptime</span><strong>{formatSeconds(overview.instance.uptime_seconds)}</strong>
             </div>
             <div><span>Database</span><strong>{overview.instance.current_database || "-"}</strong></div>
-            <div><span>Port</span><strong>{overview.instance.port ?? "-"}</strong></div>
+            <div>
+              <span>Target Port</span>
+              <strong>{targetMeta?.port ?? "-"}</strong>
+            </div>
             <div title="Groesse der aktuell verbundenen Datenbank">
               <span>Current DB Size</span><strong>{formatBytes(overview.storage.current_database_size_bytes)}</strong>
             </div>
@@ -223,11 +266,12 @@ export function TargetDetailPage() {
         <ResponsiveContainer width="100%" height="85%">
           <LineChart data={chartData}>
             <XAxis dataKey="ts" hide />
-            <YAxis />
+            <YAxis yAxisId="left" />
-            <Tooltip />
+            <YAxis yAxisId="right" orientation="right" domain={[0, 100]} />
-            <Line type="monotone" dataKey="connections" stroke="#38bdf8" dot={false} />
+            <Tooltip content={<MetricsTooltip />} />
-            <Line type="monotone" dataKey="xacts" stroke="#22c55e" dot={false} />
+            <Line yAxisId="left" type="monotone" dataKey="connections" stroke="#38bdf8" dot={false} strokeWidth={2} />
-            <Line type="monotone" dataKey="cache" stroke="#f59e0b" dot={false} />
+            <Line yAxisId="left" type="monotone" dataKey="tps" stroke="#22c55e" dot={false} strokeWidth={2} />
+            <Line yAxisId="right" type="monotone" dataKey="cache" stroke="#f59e0b" dot={false} strokeWidth={2} />
           </LineChart>
         </ResponsiveContainer>
       </div>

frontend/src/styles.css

@@ -17,6 +17,7 @@ body {
   font-family: "Space Grotesk", "Segoe UI", sans-serif;
   color: var(--text);
   background: radial-gradient(circle at top right, #1d335f, #0b1020 55%);
+  overflow: hidden;
 }
 
 a {
@@ -27,7 +28,8 @@ a {
 .shell {
   display: grid;
   grid-template-columns: 260px 1fr;
-  min-height: 100vh;
+  height: 100vh;
+  overflow: hidden;
 }
 
 .sidebar {
@@ -37,14 +39,60 @@ a {
   display: flex;
   flex-direction: column;
   gap: 20px;
+  height: 100vh;
+  position: sticky;
+  top: 0;
+  overflow: hidden;
 }
 
-.sidebar nav {
+.sidebar-nav {
   display: flex;
   flex-direction: column;
   gap: 10px;
 }
 
+.nav-btn {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 10px 12px;
+  border: 1px solid #223056;
+  border-radius: 10px;
+  background: linear-gradient(180deg, #101b3a, #0d1530);
+  color: #c6d5ef;
+  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
+}
+
+.nav-btn:hover {
+  border-color: #2e4f98;
+  background: linear-gradient(180deg, #13224b, #101b3a);
+  transform: translateY(-1px);
+}
+
+.nav-btn.active {
+  border-color: #38bdf8;
+  box-shadow: inset 0 0 0 1px #38bdf860;
+  background: linear-gradient(180deg, #16305f, #101f43);
+  color: #ecf5ff;
+}
+
+.nav-icon {
+  width: 26px;
+  height: 26px;
+  border-radius: 8px;
+  display: grid;
+  place-items: center;
+  font-size: 11px;
+  font-weight: 700;
+  border: 1px solid #2b3f74;
+  background: #0d1631;
+}
+
+.nav-label {
+  font-size: 15px;
+  font-weight: 600;
+}
+
 .profile {
   margin-top: auto;
   border-top: 1px solid #223056;
@@ -58,6 +106,8 @@ a {
 
 .main {
   padding: 24px;
+  height: 100vh;
+  overflow-y: auto;
 }
 
 .card {
@@ -120,6 +170,17 @@ button {
   cursor: pointer;
 }
 
+.logout-btn {
+  width: 100%;
+  margin-top: 8px;
+  border-color: #374f8f;
+  background: linear-gradient(180deg, #13224b, #101b3a);
+}
+
+.logout-btn:hover {
+  border-color: #38bdf8;
+}
+
 table {
   width: 100%;
   border-collapse: collapse;
@@ -152,12 +213,96 @@ td {
   min-height: 100vh;
   display: grid;
   place-items: center;
+  padding: 24px;
+  background:
+    radial-gradient(900px 500px at 20% 15%, #15356a44, transparent),
+    radial-gradient(900px 500px at 80% 90%, #1c4a7a33, transparent);
 }
 
 .login-card {
-  width: min(420px, 90vw);
+  width: min(460px, 95vw);
   display: grid;
-  gap: 8px;
+  gap: 10px;
+  border-color: #335aa4;
+  padding: 26px;
+  background: linear-gradient(180deg, #182548f0, #141f3df0);
+  box-shadow: 0 20px 50px #050b1f66;
+  backdrop-filter: blur(6px);
+  animation: loginEnter 0.5s ease;
+}
+
+.login-eyebrow {
+  font-size: 12px;
+  color: #a8badb;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.login-card h2 {
+  margin: 0;
+  font-size: 34px;
+  line-height: 1.05;
+}
+
+.login-subtitle {
+  margin: 0 0 2px 0;
+  color: #9db0d2;
+  font-size: 14px;
+}
+
+.input-shell {
+  border: 1px solid #2b3f74;
+  border-radius: 12px;
+  padding: 0;
+  background: #0e1731;
+  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
+}
+
+.input-shell:focus-within {
+  border-color: #38bdf8;
+  box-shadow: 0 0 0 3px #38bdf820;
+  transform: translateY(-1px);
+}
+
+.input-shell input {
+  width: 100%;
+  border: 0;
+  outline: none;
+  background: transparent;
+  padding: 11px 12px;
+  font-size: 15px;
+}
+
+.login-cta {
+  margin-top: 4px;
+  font-weight: 700;
+  border-color: #3f74d6;
+  background: linear-gradient(90deg, #2e7cd4, #265fb4);
+  padding: 11px 12px;
+}
+
+.login-cta:hover {
+  border-color: #6aa8ff;
+  filter: brightness(1.05);
+}
+
+.login-card input:-webkit-autofill,
+.login-card input:-webkit-autofill:hover,
+.login-card input:-webkit-autofill:focus {
+  -webkit-text-fill-color: #e5edf7;
+  -webkit-box-shadow: 0 0 0px 1000px #0e1731 inset;
+  transition: background-color 9999s ease-out 0s;
+}
+
+@keyframes loginEnter {
+  from {
+    opacity: 0;
+    transform: translateY(8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
 }
 
 .query {
@@ -214,17 +359,58 @@ td {
   margin: 8px 0 0 18px;
 }
 
+.chart-tooltip {
+  background: #0f1934ee;
+  border: 1px solid #2f4a8b;
+  border-radius: 10px;
+  padding: 10px 12px;
+  min-width: 170px;
+}
+
+.chart-tooltip-time {
+  font-size: 12px;
+  color: #9cb2d8;
+  margin-bottom: 6px;
+}
+
+.chart-tooltip-item {
+  font-size: 14px;
+  margin: 3px 0;
+}
+
+.chart-tooltip-item.c1 {
+  color: #38bdf8;
+}
+
+.chart-tooltip-item.c2 {
+  color: #22c55e;
+}
+
+.chart-tooltip-item.c3 {
+  color: #f59e0b;
+}
+
 @media (max-width: 980px) {
+  body {
+    overflow: auto;
+  }
   .shell {
     grid-template-columns: 1fr;
+    height: auto;
+    overflow: visible;
   }
   .sidebar {
     position: sticky;
     top: 0;
     z-index: 2;
+    height: auto;
   }
   .grid.two,
   .grid.three {
     grid-template-columns: 1fr;
   }
+  .main {
+    height: auto;
+    overflow: visible;
+  }
 }