feat: enhance player login process with captcha validation and improve wallet display logic

- Added captcha validation to the player login screen, requiring users to input a captcha code for authentication.
- Implemented a new API call to fetch captcha images, improving security during login.
- Updated wallet display logic to ensure accurate representation of available and total balances based on player funding modes.
- Enhanced documentation in AGENTS.md to clarify changes in credit flow and login requirements.

src/i18n/locales/en/entry.json

@@ -57,7 +57,14 @@
     "submit": "Sign in",
     "missingFields": "Please enter username and password",
     "failed": "Sign-in failed",
-    "backEntry": "Back to entry"
+    "backEntry": "Back to entry",
+    "captcha": "Captcha",
+    "captchaPlaceholder": "Enter captcha",
+    "captchaRequired": "Please load the captcha first",
+    "captchaLoadFailed": "Failed to load captcha. Try again.",
+    "captchaLoading": "Loading…",
+    "captchaRefresh": "Refresh captcha",
+    "captchaFetch": "Tap to load"
   },
   "errors": {
     "noToken": "No authorization token found",