feat(play-next): pick games by mood

public/i18n/en.json

@@ -288,7 +288,7 @@
   },
   "PLAY_NEXT": {
     "TITLE": "What to play next",
-    "SUBTITLE": "Three games from your backlog, high priority first.",
+    "SUBTITLE": "Three games from your backlog, high priority first. Pick a length and a mood.",
     "BUDGET_LABEL": "Time to beat",
     "BUDGET": {
       "SHORT": "Up to 5 h",
@@ -304,7 +304,18 @@
     "START_OVER": "Start over",
     "EMPTY": "Your backlog is empty. Nice!",
     "EMPTY_BUDGET": "No backlog game fits this length. Try a longer one.",
-    "ERROR_LOAD": "Could not load the picks."
+    "ERROR_LOAD": "Could not load the picks.",
+    "MOOD_LABEL": "Mood",
+    "MOOD": {
+      "ANY": "Any mood",
+      "STORY": "Story",
+      "COOP": "Co-op",
+      "CHILL": "Chill",
+      "ACTION": "Action",
+      "SCARY": "Scary"
+    },
+    "MOOD_HINT": "Only games whose genre IGDB knows.",
+    "EMPTY_MOOD": "No backlog game fits. Try another mood or length. New games get their mood a moment after the first pick."
   },
   "MANUAL_GAME": {
     "ADD_BUTTON": "Add game",