adding static connection

app/templates/admin/_static_connection_row.html

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+<tr id="static-connection-{{ sc.id }}">
+  <td>{{ sc.id }}</td>
+  <td>{{ sc.od_mm }}</td>
+  <td>{{ sc.od_in }}</td>
+  <td class="row-actions">
+    <button class="btn btn-ghost"
+            hx-get="/admin/static-connections/{{ sc.id }}/edit"
+            hx-target="#static-connection-{{ sc.id }}"
+            hx-swap="outerHTML">Edit</button>
+    <button class="btn btn-danger"
+            hx-delete="/admin/static-connections/{{ sc.id }}"
+            hx-target="#static-connection-{{ sc.id }}"
+            hx-swap="outerHTML"
+            hx-confirm="Delete {{ sc.od_mm }} mm?">Delete</button>
+  </td>
+</tr>

app/templates/admin/_static_connection_row_edit.html

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+<tr id="static-connection-{{ sc.id }}">
+  <td colspan="4">
+    <form hx-post="/admin/static-connections/{{ sc.id }}"
+          hx-target="#static-connection-{{ sc.id }}"
+          hx-swap="outerHTML"
+          class="inline-edit">
+      <span class="muted">#{{ sc.id }}</span>
+      <label>OD (mm) <input type="number" name="od_mm" step="0.001" min="0" value="{{ sc.od_mm }}" required></label>
+      <label>OD (in) <input type="number" name="od_in" step="0.0001" min="0" value="{{ sc.od_in }}" required></label>
+      <div class="row-actions">
+        <button type="submit" class="btn btn-primary">Save</button>
+        <button type="button" class="btn btn-ghost"
+                hx-get="/admin/static-connections/{{ sc.id }}/row"
+                hx-target="#static-connection-{{ sc.id }}"
+                hx-swap="outerHTML">Cancel</button>
+      </div>
+    </form>
+  </td>
+</tr>

app/templates/admin/_static_connections_table.html

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+<div id="static-connection-list" class="card">
+  <table class="table">
+    <thead>
+      <tr>
+        <th>ID</th>
+        <th>OD (mm)</th>
+        <th>OD (in)</th>
+        <th></th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for sc in static_connections %}
+        {% include "admin/_static_connection_row.html" %}
+      {% else %}
+        <tr><td colspan="4" class="muted">No static connections recorded.</td></tr>
+      {% endfor %}
+    </tbody>
+  </table>
+</div>

app/templates/admin/static_connections.html

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+{% extends "base.html" %}
+{% block title %}Static Connections · {{ app_name }}{% endblock %}
+{% block body %}
+{% include "_nav.html" %}
+<main class="container">
+  <h1>Static Connections</h1>
+
+  <div class="card">
+    <h2>Add connection</h2>
+    <form hx-post="/admin/static-connections" hx-target="#static-connection-list" hx-swap="outerHTML" class="form-grid">
+      <label>OD (mm) <input type="number" name="od_mm" step="0.001" min="0" placeholder="e.g. 30.0" required></label>
+      <label>OD (in) <input type="number" name="od_in" step="0.0001" min="0" placeholder="e.g. 1.1811" required></label>
+      <button type="submit" class="btn btn-primary">Add</button>
+    </form>
+  </div>
+
+  {% include "admin/_static_connections_table.html" %}
+</main>
+{% endblock %}