feat: web dashboard and playground work

The NexusDashboard-parity dashboard (dDashboardServer) and everything built on it on the experimental branch:
accounts, characters, properties and moderation tools, permissions shared with in-game slash commands, economy
reports, World 3D and property 3D views with client scenery, scheduled events (features, vanity changes, live
events, announcements, restarts), vanity files and events, the CDClient browser, the message inspector with saved
captures, chat filter tools, community challenges, live ops, the AI moderator helper, and the server-side changes
they need.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dDatabase/GameDatabase/ITables/IAccounts.h

@@ -5,6 +5,7 @@
 #include <optional>
 #include <string>
 #include <string_view>
+#include "json.hpp"
 
 enum class eGameMasterLevel : uint8_t;
 
@@ -17,6 +18,8 @@ public:
 		uint64_t muteExpire{};
 		bool banned{};
 		bool locked{};
+		int64_t banExpires{}; // unix time a temporary ban ends; 0 for a permanent one
+		std::string banReason;
 		eGameMasterLevel maxGmLevel{};
 	};
 
@@ -33,12 +36,49 @@ public:
 	virtual void UpdateAccountPassword(const uint32_t accountId, const std::string_view bcryptpassword) = 0;
 
 	// Add a new account to the database.
-	virtual void InsertNewAccount(const std::string_view username, const std::string_view bcryptpassword) = 0;
+	virtual void InsertNewAccount(const std::string_view username, const std::string_view bcryptpassword, const eGameMasterLevel gmLevel) = 0;
 
 	// Update the GameMaster level of an account.
 	virtual void UpdateAccountGmLevel(const uint32_t accountId, const eGameMasterLevel gmLevel) = 0;
 
 	virtual uint32_t GetAccountCount() = 0;
+
+	// Login attempt tracking methods
+	// Record a failed login attempt
+	virtual void RecordFailedAttempt(const uint32_t accountId) = 0;
+
+	// Clear failed login attempts and update last login time
+	virtual void ClearFailedAttempts(const uint32_t accountId) = 0;
+
+	// Throttle logins to the account until the given unix time (after too many failed attempts) and start a new failure count.
+	// This is not the staff lock; see SetAccountLocked. 0 clears the lockout.
+	virtual void SetLockout(const uint32_t accountId, const int64_t lockoutUntil) = 0;
+
+	// Whether the account's failed-login lockout (SetLockout) is still running
+	virtual bool IsLockedOut(const uint32_t accountId) = 0;
+
+	// Staff lock (accounts.locked): a locked account can't log in to the game or the dashboard until unlocked
+	virtual void SetAccountLocked(const uint32_t accountId, const bool locked) = 0;
+
+	// Get failed attempt count
+	virtual uint8_t GetFailedAttempts(const uint32_t accountId) = 0;
+
+	// Get paginated list of accounts with optional search/filtering for DataTables
+	// Returns a JSON object with the account data and metadata
+	virtual nlohmann::json GetAccountsTable(uint32_t start, uint32_t length, const std::string_view search = "", uint32_t orderColumn = 0, bool orderAsc = true) = 0;
+
+	// Get a single account by ID
+	// Returns a JSON object with the account details
+	virtual nlohmann::json GetAccountById(uint32_t accountId) = 0;
+
+	// Get characters for an account as JSON for dashboard display
+	virtual nlohmann::json GetAccountCharacters(uint32_t accountId) = 0;
+
+	// Delete an account and all related data
+	virtual void DeleteAccount(const uint32_t accountId) = 0;
+
+	// How many accounts at exactly this GM level can still sign in (not banned or locked), leaving out excludeAccountId
+	virtual uint32_t CountActiveAccountsAtGmLevel(const uint8_t gmLevel, const uint32_t excludeAccountId) = 0;
 };
 
 #endif  //!__IACCOUNTS__H__