Web App: fold integration cards; split Charging into two tabs

Settings → Integrations: the Toyota and Anker Solix cards are now
collapsible, like the plugin rows in the API Server panel. Each header
is a toggle with a rotating chevron; the Connected badge stays visible
when collapsed. Bodies use v-show so loaded state and in-flight edits
survive folding. Collapsed by default.

Charging: split into "Public chargers" and "Home chargers" tabs. Public
keeps the discovery map (public pins only) + demo session + nearby
public stations. Home holds the real OCPP control card (moved here) and
the user's home charger list, with a hint pointing to Settings when no
control mode is active. Adds charging.tabs.*, stations.homeHeading and
stations.noControlHint (en/pl/da).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Web App/web/src/i18n/en.json

@@ -35,6 +35,10 @@
   "charging": {
     "eyebrow": "Charging & map",
     "title": "Nearby chargers",
+    "tabs": {
+      "public": "Public chargers",
+      "home": "Home chargers"
+    },
     "liveMap": "Live map",
     "youAreHere": "You are here",
     "session": {
@@ -67,6 +71,8 @@
     },
     "stations": {
       "heading": "Nearby",
+      "homeHeading": "Your chargers",
+      "noControlHint": "Turn on Own or Proxy CSMS in Settings → Integrations to control your home charger here.",
       "count": {
         "one": "{n} station",
         "other": "{n} stations"