v0.22.0: First-run setup wizard, local infra backup, hub verification

New controller features:
- Web-based setup wizard replaces docker-setup.sh interactive config
  - Dual listener: :8080 (Traefik) + :8081 (direct HTTP for LAN)
  - Drive scanner finds .felhom-infra-backup/ on all block devices
  - Hub recovery pull (GET /api/v1/recovery/{id}) with retrieval password
  - Fresh install: Hub config download or manual wizard
  - CSRF protection, state persistence, Hungarian UI
- Local infra backup written to all connected drives after each backup cycle
  - .felhom-infra-backup/backup.json + metadata.json with SHA256 checksum
- Hub verification: parse customer_blocked from report push response
  - Limited mode after 7 days without verification
- Recovery info page on Settings + recovery-info.txt file generation
- Pending events queue: DR events sent to Hub on next report push
- docker-setup.sh v6.0.0: removed interactive wizard, minimal controller.yaml only

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

controller/internal/web/templates/settings.html

@@ -487,6 +487,46 @@ function pollUntilBack() {
     {{end}}
 </div>
 
+<!-- Section: Recovery Info -->
+{{if .RetrievalPassword}}
+<div class="settings-card">
+    <h3>Veszhelyzeti informaciok</h3>
+    <p class="settings-card-desc">
+        Ezeket az adatokat mentse el biztos helyre. Ujratelepites eseten szukseg lesz rajuk a rendszer visszaallitasahoz.
+    </p>
+    <div class="settings-grid">
+        <div class="settings-row">
+            <span class="settings-label">Ugyfel azonosito</span>
+            <span class="settings-value mono">{{.CustomerID}}</span>
+        </div>
+        <div class="settings-row">
+            <span class="settings-label">Hub URL</span>
+            <span class="settings-value mono">{{.HubURL}}</span>
+        </div>
+        <div class="settings-row">
+            <span class="settings-label">Visszaallitasi jelszo</span>
+            <span class="settings-value">
+                <span id="retrieval-pw-hidden">••••••••••••••••
+                    <button type="button" class="btn btn-xs btn-outline" onclick="document.getElementById('retrieval-pw-hidden').style.display='none';document.getElementById('retrieval-pw-visible').style.display='inline';">Megjelenit</button>
+                </span>
+                <span id="retrieval-pw-visible" style="display:none">
+                    <code class="mono">{{.RetrievalPassword}}</code>
+                    <button type="button" class="btn btn-xs btn-outline" onclick="document.getElementById('retrieval-pw-visible').style.display='none';document.getElementById('retrieval-pw-hidden').style.display='inline';">Elrejt</button>
+                </span>
+            </span>
+        </div>
+        <div class="settings-row">
+            <span class="settings-label">Tamogatas</span>
+            <span class="settings-value">
+                <a href="mailto:{{.SupportEmail}}" style="color: var(--accent-blue, #0088cc);">{{.SupportEmail}}</a>
+                &nbsp;|&nbsp;
+                <a href="{{.SupportURL}}" target="_blank" style="color: var(--accent-blue, #0088cc);">felhom.eu/kapcsolat</a>
+            </span>
+        </div>
+    </div>
+</div>
+{{end}}
+
 <script>
 function editStorageLabel(path, currentLabel) {
     var wrap = document.getElementById('label-wrap-' + path);