feat(header): add community link to nav

Add an icon-only nav link to "/" so logged-in users can get back
to the community stats. Make room for it: less nav link padding
below sm, points chip no longer shrinks from lg, and the view-as
badge hangs below the header at every width.

public/i18n/de.json

@@ -380,6 +380,7 @@
     "LIGHT_MODE": "Helles Design",
     "PLAY_NEXT": "Nächstes Spiel",
     "STATS": "Statistik",
+    "COMMUNITY": "Community",
     "POINTS": "Pile Points",
     "ADMIN": "Admin",
     "VIEW_AS": {

public/i18n/en.json

@@ -380,6 +380,7 @@
     "LIGHT_MODE": "Light mode",
     "PLAY_NEXT": "Play next",
     "STATS": "Stats",
+    "COMMUNITY": "Community",
     "POINTS": "Pile Points",
     "ADMIN": "Admin",
     "VIEW_AS": {