feat(profile): public profile page and the switch in settings

/u/<name> shows a public profile without login. Settings get the switch and
the link; every settings save now sends the other saved values, and removing
the display name also makes the profile private.

public/i18n/en.json

@@ -59,7 +59,12 @@
     "DISPLAY_NAME_PLACEHOLDER": "e.g. Lobo",
     "DISPLAY_NAME_HINT": "3–24 characters: letters, digits, spaces, _ . -",
     "SAVE_PROFILE": "Save profile",
-    "ERROR_DISPLAY_NAME_IN_USE": "This display name is already taken."
+    "ERROR_DISPLAY_NAME_IN_USE": "This display name is already taken.",
+    "PUBLIC_PROFILE": "Public profile",
+    "PUBLIC_PROFILE_HINT": "Anyone with the link sees your stats, what you play right now and your finished games with ratings. Notes, email and Steam ID stay private.",
+    "PUBLIC_PROFILE_NEEDS_NAME": "Set a display name first; it becomes part of the link.",
+    "PUBLIC_PROFILE_COPY": "Copy link",
+    "PUBLIC_PROFILE_COPIED": "Link copied"
   },
   "VALIDATION": {
     "EMAIL_REQUIRED": "Email is required.",
@@ -216,5 +221,17 @@
     "NO_PRICE": "No price yet",
     "ADDED": "Added {{date}}",
     "ERROR_LOAD": "Could not load the wishlist."
+  },
+  "PROFILE": {
+    "TITLE": "Player profile",
+    "MEMBER_SINCE": "Member since {{date}}",
+    "GAMES": "Games",
+    "PLAYTIME": "Playtime",
+    "FINISHED": "Finished",
+    "PLAYING": "Playing right now",
+    "FINISHED_GAMES": "Finished games",
+    "NOT_FOUND": "This profile does not exist or is private.",
+    "ERROR_LOAD": "Could not load the profile.",
+    "TO_START": "To the start page"
   }
 }