i18n polish + Swedish wired + roadmap slim + AppImage 1.2.4.1-beta

## i18n

- Swedish (sv) wired end-to-end: `MESSAGE_CATALOG` in `provider.tsx` now imports `sv/common.json`; `SUPPORTED_LANGUAGES` reordered as English + alphabetical native and all eight locales marked complete.
- Settings → Interface language: the per-locale status cards grid is retired now that all eight locales are populated end-to-end; the dropdown selector is the only control.
- CLI change-language dialog (`scripts/menus/config_menu.sh`) picks up Swedish and matches the Monitor ordering.
- Spanish catalog: label polish across the dashboard — *VM y LXC activos* / *11 VMs* / *11 detenidos*, LXC modal tabs shortened to *App / Actualiz. / Montajes / Copias*, *Limpiar / Cerrar* replacing the wrong *Claro / Cerca* in terminal controls, *En ejecución / Ejecutar* replacing the literal *Correr*.
- Cross-locale normalisation across ES / DE / FR / IT / PT / SK / SV: *OK* / *Proxmox System Dashboard* / *Warn* labels stay consistent, *AVG / MAX / MIN* kept verbatim as universal abbreviations so the stats row no longer overflows.
- Tailscale brand preserved verbatim across ES / FR / IT / PT — previous machine-translated variants like *"escala trasera"* / *"à grande échelle"* restored.

## Docs

- `ROADMAP.md` rewritten as a short invitation to the [ProxMenux Roadmap project board](https://github.com/users/MacRimi/projects/1). `ROADMAP.es.md` removed — it mirrored the same outdated version-milestone plan and the docs site keeps the Spanish surface for users who need it.
- `release.md` annotated with nine pending sections for the v1.2.4.1 beta cycle.

## AppImage

- `ProxMenux-1.2.4.1-beta.AppImage` replaces the previous `ProxMenux-1.2.4.AppImage`. Sidecar `ProxMenux-Monitor.AppImage.sha256` regenerated.

AppImage/messages/it/common.json

@@ -2,7 +2,7 @@
   "_meta": "Community translation target. Copy keys from ../en/common.json and translate the values.",
   "app": {
     "title": "ProxMenux Monitor",
-    "description": "Cruscotto del sistema Proxmox",
+    "description": "Proxmox System Dashboard",
     "loading": "Caricamento...",
     "connecting": "Connessione al ProxMenux Monitor",
     "unknown": "Sconosciuto",
@@ -144,8 +144,8 @@
       "year": "1 anno"
     },
     "stats": {
-      "avg": "media",
-      "max": "massimo",
+      "avg": "avg",
+      "max": "max",
       "min": "min"
     },
     "errors": {
@@ -840,7 +840,7 @@
       "topCount": "Principali {shown} dei {total} processi",
       "loadFailed": "Impossibile recuperare i processi",
       "lifetimeAverageTitle": "% CPU media durante la durata di questo processo: utile per trovare linee di base inattive di lunga durata",
-      "averageShort": "media"
+      "averageShort": "avg"
     },
     "processInfo": {
       "titleFallback": "Processo",
@@ -4218,7 +4218,7 @@
       "total": "Totale",
       "healthy": "Salutare",
       "info": "Informazioni",
-      "warning": "Avvisare",
+      "warning": "Avviso",
       "critical": "Critico",
       "unknown": "Sconosciuto"
     },