v0.56.0: Phase 4 — FileBrowser scoping + deploy DB-on-SSD note + monitoring descriptions

4A: scope FileBrowser bind to <drive>/appdata (recovery units + Tier 2 copies under
backups/ are no longer mounted into FileBrowser — customer can't browse/delete the
thing that restores them). 4B: deploy storage-selection step states the chosen drive
holds files while the DB runs on the fast internal SSD + is backed up with the app.
4C: buildStorageBars stable sort + purpose description on the monitoring storage list.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

controller/internal/web/templates/deploy.html

@@ -538,6 +538,10 @@
                 <div id="storage-space-warn" class="form-hint" style="color:var(--yellow);display:none">
                     ⚠️ A kiválasztott tárhely majdnem megtelt.
                 </div>
+                <div class="form-hint" style="margin-top:.4rem;opacity:.8">
+                    ℹ️ A kiválasztott meghajtón az alkalmazás <strong>fájljai</strong> (média, dokumentumok) tárolódnak.
+                    Az <strong>adatbázis a gyors belső SSD-n</strong> fut — és az alkalmazással együtt készül róla biztonsági mentés.
+                </div>
                 {{else}}
                 <input type="text" id="field-{{.EnvVar}}" name="{{.EnvVar}}"
                        class="form-control" value="{{.Default}}"

controller/internal/web/templates/monitoring.html

@@ -106,6 +106,7 @@
             <div class="system-bar">
                 <div class="system-bar-fill {{usageColor .Percent | printf "system-bar-%s"}}" style="width:{{printf "%.1f" .Percent}}%"></div>
             </div>
+            {{if .Purpose}}<div class="storage-purpose" style="font-size:.72rem;opacity:.65;margin-top:.2rem">{{.Purpose}}</div>{{end}}
         </div>
         {{end}}
         {{end}}