feat: Business Central backup Docker container with web management panel

Python backup module (Azure AD OAuth2 → BC API v2.0 → GPG AES256 → S3),
Flask web UI on port 1890 with SSE live log streaming, dual incremental +
full backup schedules, chain restore merging full + incrementals, and
per-entity file browser with ZIP download.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/restore_view.html

@@ -0,0 +1,165 @@
+{% extends "base.html" %}
+{% block title %} — Restore #{{ restore['id'] }}{% endblock %}
+
+{% block content %}
+<div class="page-header">
+  <div>
+    <h4 class="mb-0">
+      <i class="bi bi-folder2-open me-2 text-warning"></i>Restore #{{ restore['id'] }}
+    </h4>
+    <div class="text-muted small mt-1">
+      {{ restore['s3_key'].split('/')[-1] }} ·
+      Started {{ restore['started_at'] | fmtdt }} ·
+      {{ restore['started_at'] | duration(restore['completed_at']) }}
+    </div>
+  </div>
+  <div class="d-flex gap-2">
+    {% if restore['status'] == 'success' %}
+      <a href="{{ url_for('restore_download_zip', restore_id=restore['id']) }}"
+         class="btn btn-outline-primary">
+        <i class="bi bi-file-zip me-1"></i>Download All (ZIP)
+      </a>
+    {% endif %}
+    <a href="{{ url_for('restore_list') }}" class="btn btn-outline-secondary">
+      <i class="bi bi-arrow-left me-1"></i>All Restores
+    </a>
+  </div>
+</div>
+
+{% if streaming_id %}
+<!-- Still running — show live log -->
+<div class="card stat-card mb-3">
+  <div class="card-body">
+    <div class="d-flex align-items-center gap-2 mb-3">
+      <div class="spinner-border spinner-border-sm text-warning"></div>
+      <span id="liveStatus" class="text-muted">Restore in progress…</span>
+    </div>
+    <div class="log-terminal" id="liveLog"></div>
+  </div>
+</div>
+
+{% elif restore['status'] == 'failed' %}
+<div class="alert alert-danger border-0 shadow-sm">
+  <i class="bi bi-x-circle-fill me-2"></i>
+  <strong>Restore failed:</strong> {{ restore['error_message'] or 'Unknown error' }}
+</div>
+
+{% else %}
+<!-- Success — restore type banner -->
+{% set rmode = restore_info.get('restore_mode', 'full') %}
+{% if rmode == 'chain' %}
+<div class="alert alert-success border-0 shadow-sm mb-4">
+  <i class="bi bi-check-circle-fill me-2"></i>
+  <strong>Chain Restore</strong> — {{ restore_info.get('chain_length', 1) }} archives merged
+  (1 full + {{ restore_info.get('chain_length', 1) - 1 }} incremental).
+  <span class="ms-2 text-success fw-semibold">{{ restore['file_count'] }} entity files — complete snapshot.</span>
+</div>
+{% elif rmode == 'incremental' %}
+<div class="alert alert-warning border-0 shadow-sm mb-4">
+  <i class="bi bi-exclamation-triangle-fill me-2"></i>
+  <strong>Partial Restore</strong> — this is a single incremental archive.
+  Only <strong>{{ restore['file_count'] }} entity files</strong> with changes in that specific run are present.
+  <span class="ms-2">Use <strong>Chain Restore</strong> from the Restore page for a complete snapshot.</span>
+</div>
+{% else %}
+<div class="alert alert-success border-0 shadow-sm mb-4">
+  <i class="bi bi-check-circle-fill me-2"></i>
+  <strong>Full Snapshot</strong> — <strong>{{ restore['file_count'] }} entity files</strong> extracted.
+</div>
+{% endif %}
+
+{% if by_company %}
+<!-- Search box -->
+<div class="mb-3">
+  <input type="text" id="entitySearch" class="form-control"
+         placeholder="Filter entities… (e.g. customers, salesInvoices)">
+</div>
+
+<div class="accordion" id="companyAccordion">
+  {% for company in by_company | sort %}
+  {% set entities = by_company[company] %}
+  <div class="accordion-item border-0 mb-2 shadow-sm rounded overflow-hidden">
+    <h2 class="accordion-header">
+      <button class="accordion-button fw-semibold" type="button"
+              data-bs-toggle="collapse"
+              data-bs-target="#collapse-{{ loop.index }}"
+              aria-expanded="true">
+        <i class="bi bi-building me-2 text-primary"></i>
+        {{ company }}
+        <span class="badge bg-primary bg-opacity-15 text-primary ms-2">
+          {{ entities | length }} entities
+        </span>
+      </button>
+    </h2>
+    <div id="collapse-{{ loop.index }}" class="accordion-collapse collapse show">
+      <div class="accordion-body p-0">
+        <div class="table-responsive">
+          <table class="table table-hover table-sm mb-0 table-files">
+            <thead class="table-light">
+              <tr>
+                <th>Entity</th>
+                <th>Format</th>
+                <th>Size</th>
+                <th class="text-end"></th>
+              </tr>
+            </thead>
+            <tbody>
+              {% for f in entities %}
+              <tr data-entity="{{ f['entity'] }}">
+                <td class="font-monospace">{{ f['entity'] }}</td>
+                <td><span class="badge bg-secondary bg-opacity-15 text-secondary">{{ f['ext'] }}</span></td>
+                <td class="text-muted small">{{ f['size_kb'] }} KB</td>
+                <td class="text-end">
+                  <a href="{{ url_for('restore_download_file', restore_id=restore['id']) }}?path={{ f['path'] | urlencode }}"
+                     class="btn btn-outline-secondary btn-sm py-0">
+                    <i class="bi bi-download me-1"></i>Download
+                  </a>
+                </td>
+              </tr>
+              {% endfor %}
+            </tbody>
+          </table>
+        </div>
+      </div>
+    </div>
+  </div>
+  {% endfor %}
+</div>
+{% else %}
+<div class="text-muted text-center py-4">No entity files found in this restore.</div>
+{% endif %}
+{% endif %}
+{% endblock %}
+
+{% block scripts %}
+{% if streaming_id %}
+<script>
+const liveLog    = document.getElementById('liveLog');
+const liveStatus = document.getElementById('liveStatus');
+
+const evtSrc = new EventSource('/api/restore/{{ streaming_id }}/stream');
+evtSrc.onmessage = function(e) {
+  const msg = JSON.parse(e.data);
+  if (msg.keepalive) return;
+  if (msg.done) {
+    evtSrc.close();
+    liveStatus.textContent = msg.status === 'success' ? 'Restore complete — reloading…' : 'Restore failed.';
+    if (msg.status === 'success') setTimeout(() => location.reload(), 1500);
+    return;
+  }
+  if (msg.log) appendLog(liveLog, msg.log);
+};
+</script>
+{% endif %}
+
+{% if by_company %}
+<script>
+document.getElementById('entitySearch').addEventListener('input', function() {
+  const q = this.value.toLowerCase();
+  document.querySelectorAll('.table-files tbody tr').forEach(row => {
+    row.style.display = row.dataset.entity.toLowerCase().includes(q) ? '' : 'none';
+  });
+});
+</script>
+{% endif %}
+{% endblock %}