feat(calibration): complete step 1 data inspection with data quality v1

src/web/ui/v2/templates/pages/trading/dashboard.html

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+{% extends "layout.html" %}
+
+{% block content %}
+<div class="container-xl">
+
+  <!-- Page header -->
+  <div class="page-header d-print-none mb-4">
+    <div class="row align-items-center">
+      <div class="col">
+        <h2 class="page-title">
+          Trading – Dashboard
+        </h2>
+        <div class="text-muted mt-1">
+          Temporary overview (focus is on Calibration)
+        </div>
+      </div>
+    </div>
+  </div>
+
+  <!-- KPI row -->
+  <div class="row row-deck row-cards mb-4">
+    <div class="col-sm-6 col-lg-4">
+      <div class="card">
+        <div class="card-body">
+          <div class="subheader">Equity</div>
+          <div class="h1">—</div>
+        </div>
+      </div>
+    </div>
+
+    <div class="col-sm-6 col-lg-4">
+      <div class="card">
+        <div class="card-body">
+          <div class="subheader">PnL</div>
+          <div class="h1">—</div>
+        </div>
+      </div>
+    </div>
+
+    <div class="col-sm-6 col-lg-4">
+      <div class="card">
+        <div class="card-body">
+          <div class="subheader">Bot status</div>
+          <div class="h1">—</div>
+        </div>
+      </div>
+    </div>
+  </div>
+
+  <!-- Calibration CTA -->
+  <div class="row">
+    <div class="col-12">
+      <div class="card card-md">
+        <div class="card-body text-center">
+          <h3 class="mb-3">Strategy Calibration</h3>
+          <p class="text-muted mb-4">
+            Configure data, stops, strategies and parameters step by step.
+          </p>
+
+          <a href="/calibration/data" class="btn btn-primary btn-lg">
+            Go to Calibration
+          </a>
+        </div>
+      </div>
+    </div>
+  </div>
+
+</div>
+{% endblock %}