fix: conditional checks, evershelf.db fix, warning popup 5s, error modal (v1.7.22)

- health_check: use evershelf.db (not dispensa.db); auto-migrate if needed
- removed dispensa.db (legacy, obsolete)
- backups check: verify files exist (not dir writability, cron writes as root)
- bring_token: read data/bring_token.json (not env var)
- warning popup: 5s countdown bar with label+hint per warning, auto-closes
- error popup: blocking panel with title + hint per critical failure
- db_legacy check: warns if old dispensa.db still present
- 32 total checks (added db_legacy, tts_url, scale_gateway)
- hint messages on every check explaining cause and fix
- translations: added check_db_legacy, check_tts, check_scale,
  critical_error_intro, error_network_detail in it/en/de

assets/css/style.css

@@ -155,13 +155,88 @@ body {
     letter-spacing: 0.01em;
 }
 .preloader-warnings {
-    display: flex;
-    flex-wrap: wrap;
-    gap: 5px;
-    justify-content: center;
-    max-width: 270px;
-    animation: zwFadeIn 0.25s ease;
+    max-width: 310px;
+    width: 100%;
+    animation: zwFadeIn 0.3s ease;
 }
+
+/* ── Warning popup (auto-close 5s) ─────────────────────────── */
+.startup-popup {
+    border-radius: 12px;
+    overflow: hidden;
+    width: 100%;
+}
+.startup-popup-warn {
+    background: rgba(30,20,0,0.85);
+    border: 1px solid rgba(251,191,36,0.45);
+}
+.startup-popup-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 9px 14px 7px;
+    font-size: 0.82rem;
+    font-weight: 600;
+    color: #fcd34d;
+    gap: 8px;
+}
+.startup-popup-countdown {
+    background: rgba(251,191,36,0.2);
+    color: #fcd34d;
+    border-radius: 50%;
+    width: 22px;
+    height: 22px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 0.75rem;
+    font-weight: 700;
+    flex-shrink: 0;
+}
+.startup-popup-body {
+    padding: 2px 14px 10px;
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+.startup-warn-item {
+    display: flex;
+    align-items: flex-start;
+    gap: 8px;
+}
+.startup-warn-icon {
+    font-size: 1rem;
+    flex-shrink: 0;
+    margin-top: 1px;
+}
+.startup-warn-body {
+    font-size: 0.78rem;
+    color: #d4c08a;
+    line-height: 1.4;
+}
+.startup-warn-body strong {
+    display: block;
+    color: #fcd34d;
+    font-size: 0.82rem;
+    margin-bottom: 2px;
+}
+.startup-warn-body p {
+    margin: 0;
+    color: #c8a954;
+}
+.startup-popup-bar-wrap {
+    height: 3px;
+    background: rgba(251,191,36,0.15);
+}
+.startup-popup-bar {
+    height: 3px;
+    background: #fbbf24;
+    width: 100%;
+    will-change: width;
+}
+
+/* ── Error popup (blocking) ─────────────────────────────────── */
+/* Keep .preloader-warn-badge for backward compat */
 .preloader-warn-badge {
     background: rgba(251,191,36,0.15);
     color: #fcd34d;
@@ -175,15 +250,22 @@ body {
     color: #fca5a5;
     background: rgba(239,68,68,0.18);
     border: 1px solid rgba(239,68,68,0.4);
-    border-radius: 10px;
-    padding: 12px 18px;
-    font-size: 0.84rem;
-    text-align: center;
-    max-width: 280px;
-    line-height: 1.5;
+    border-radius: 12px;
+    padding: 14px 18px;
+    font-size: 0.80rem;
+    text-align: left;
+    max-width: 300px;
+    line-height: 1.6;
     white-space: pre-line;
     animation: zwFadeIn 0.3s ease;
 }
+.preloader-error-msg strong {
+    display: block;
+    font-size: 0.9rem;
+    color: #f87171;
+    margin-bottom: 8px;
+    text-align: center;
+}
 .preloader-retry-btn {
     background: #ef4444;
     color: #fff;