perf(webui): refactor dashboard modules and optimize API performance

public/js/config/constants.js

@@ -0,0 +1,82 @@
+/**
+ * Application Constants
+ * Centralized configuration values and magic numbers
+ */
+window.AppConstants = window.AppConstants || {};
+
+/**
+ * Time intervals (in milliseconds)
+ */
+window.AppConstants.INTERVALS = {
+    // Dashboard refresh interval (5 minutes)
+    DASHBOARD_REFRESH: 300000,
+
+    // OAuth message handler timeout (5 minutes)
+    OAUTH_MESSAGE_TIMEOUT: 300000,
+
+    // Server config debounce delay
+    CONFIG_DEBOUNCE: 500,
+
+    // General short delay (for UI transitions)
+    SHORT_DELAY: 2000
+};
+
+/**
+ * Data limits and quotas
+ */
+window.AppConstants.LIMITS = {
+    // Default log limit
+    DEFAULT_LOG_LIMIT: 2000,
+
+    // Minimum quota value
+    MIN_QUOTA: 100,
+
+    // Percentage base (for calculations)
+    PERCENTAGE_BASE: 100
+};
+
+/**
+ * Validation ranges
+ */
+window.AppConstants.VALIDATION = {
+    // Port range
+    PORT_MIN: 1,
+    PORT_MAX: 65535,
+
+    // Timeout range (0 - 5 minutes)
+    TIMEOUT_MIN: 0,
+    TIMEOUT_MAX: 300000,
+
+    // Log limit range
+    LOG_LIMIT_MIN: 100,
+    LOG_LIMIT_MAX: 10000,
+
+    // Retry configuration ranges
+    MAX_RETRIES_MIN: 0,
+    MAX_RETRIES_MAX: 20,
+
+    RETRY_BASE_MS_MIN: 100,
+    RETRY_BASE_MS_MAX: 10000,
+
+    RETRY_MAX_MS_MIN: 1000,
+    RETRY_MAX_MS_MAX: 60000,
+
+    // Cooldown range (0 - 10 minutes)
+    DEFAULT_COOLDOWN_MIN: 0,
+    DEFAULT_COOLDOWN_MAX: 600000,
+
+    // Max wait threshold (1 - 30 minutes)
+    MAX_WAIT_MIN: 60000,
+    MAX_WAIT_MAX: 1800000
+};
+
+/**
+ * UI Constants
+ */
+window.AppConstants.UI = {
+    // Toast auto-dismiss duration
+    TOAST_DURATION: 3000,
+
+    // Loading spinner delay
+    LOADING_DELAY: 200
+};