feat: Loksyu & TinJi standalone AppV2 apps with chat buttons and dice automation

- CDELoksyuApp: standalone HandlebarsApplicationMixin(ApplicationV2) app
  - 5-element Wu Xing grid with yin/yang inputs per element
  - Per-element reset buttons + global reset-all
  - Auto-refresh via updateActor hook

- CDETinjiApp: standalone AppV2 for the collective Tin Ji dice pool
  - Large neon counter with +/- buttons and direct input
  - Spend button sends a chat message with remaining count

- singletons.js: shared utilities
  - getSingletonActor: find or auto-create singleton actor
  - updateLoksyuFromRoll: compute lokAspect from Wu Xing cycle, update yin/yang
  - updateTinjiFromRoll: add tinji face count to value

- rolling.js: auto-update both singletons after every dice roll
  (weapon path + main roll path)

- system.js: renderChatLog hook injects Loksyu/TinJi footer buttons
  in the chat sidebar

- loksyu.js / tinji.js: actor sheets redirect to standalone apps
  when opened via the sidebar

- CSS: .cde-loksyu-standalone, .cde-tinji-standalone, .cde-chat-app-buttons,
  .cde-tinji-spend-msg styles added

- i18n: new keys in fr-cde.json and en-cde.json for all new UI strings
  (LoksyuNotFound, TinjiNotFound, Reset, ResetAll, SpendTinji, etc.)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

lang/en-cde.json

@@ -242,6 +242,7 @@
 
   "CDE.LoksyuName": "Loksyu Name",
   "CDE.Loksyu": "Loksyu",
+  "CDE.LoksyuNotFound": "No Loksyu actor found. The Game Master must create one.",
   "CDE.MetalYang": "㊎ Yang Metal (3)",
   "CDE.MetalYin": "㊎ Yin Metal (8)",
   "CDE.WaterYang": "㊌ Yang Water (1)",
@@ -302,6 +303,15 @@
 
   "CDE.TinJiName": "Tin Ji Name",
   "CDE.TinJi2": "Tin Ji",
+  "CDE.TinjiNotFound": "No Tin Ji actor found. The Game Master must create one.",
+  "CDE.TinjiEmpty": "No Tin Ji dice remaining.",
+  "CDE.TinjiSpent": "{name} spends 1 Tin Ji die.",
+  "CDE.TinjiRemaining": "remaining",
+  "CDE.SpendTinji": "Spend a die",
+  "CDE.Reset": "Reset",
+  "CDE.ResetAll": "Reset all",
+  "CDE.Decrement": "Decrease",
+  "CDE.Increment": "Increase",
 
   "CDE.UpperCaseSuccesses": "SUCCESSES",
   "CDE.UpperCaseAuspiciousDice": "AUSPICIOUS-DICE",