feat(cliproxy): add customizable auth token manager

- Add CLIProxyAuthConfig type with api_key and management_secret fields
- Implement auth-token-manager.ts with inheritance chain:
  variant auth → global auth → default constants
- Add secure token generation using crypto.randomBytes (256-bit entropy)
- Export auth functions from cliproxy barrel (index.ts)
- Bump UNIFIED_CONFIG_VERSION to 6

src/cliproxy/auth-token-manager.ts

@@ -0,0 +1,203 @@
+/**
+ * Auth Token Manager for CLIProxyAPI
+ *
+ * Manages API key and management secret resolution with inheritance:
+ * - Per-variant override → Global config → Default constants
+ *
+ * Provides secure token generation for user customization.
+ */
+
+import { randomBytes } from 'crypto';
+import { loadOrCreateUnifiedConfig, saveUnifiedConfig } from '../config/unified-config-loader';
+import { CCS_INTERNAL_API_KEY, CCS_CONTROL_PANEL_SECRET } from './config-generator';
+
+/**
+ * Generate a cryptographically secure token.
+ * Uses CSPRNG (crypto.randomBytes) for proper entropy.
+ *
+ * @param length - Number of random bytes (default: 32 = 256-bit entropy)
+ * @returns Base64URL-encoded token (43 chars for 32 bytes)
+ */
+export function generateSecureToken(length = 32): string {
+  return randomBytes(length).toString('base64url');
+}
+
+/**
+ * Mask a token for display.
+ * Shows first 4 and last 4 chars: "ccs_...4f2a"
+ * Used by CLI commands and API routes.
+ */
+export function maskToken(token: string): string {
+  if (token.length <= 8) return '****';
+  return `${token.slice(0, 4)}...${token.slice(-4)}`;
+}
+
+/**
+ * Get effective API key with inheritance chain.
+ * Priority: variant auth → global cliproxy.auth → default constant
+ *
+ * @param variantName - Optional variant name for per-variant override
+ * @returns Resolved API key
+ */
+export function getEffectiveApiKey(variantName?: string): string {
+  const config = loadOrCreateUnifiedConfig();
+
+  // Priority 1: Per-variant override
+  if (variantName) {
+    const variant = config.cliproxy.variants[variantName];
+    if (variant?.auth?.api_key) {
+      return variant.auth.api_key;
+    }
+  }
+
+  // Priority 2: Global cliproxy.auth
+  if (config.cliproxy.auth?.api_key) {
+    return config.cliproxy.auth.api_key;
+  }
+
+  // Priority 3: Default constant (backwards compatible)
+  return CCS_INTERNAL_API_KEY;
+}
+
+/**
+ * Get effective management secret.
+ * Priority: global cliproxy.auth → default constant
+ *
+ * Note: Management secret is global-only (no per-variant override)
+ * as it controls the Control Panel access for the entire CLIProxy instance.
+ *
+ * @returns Resolved management secret
+ */
+export function getEffectiveManagementSecret(): string {
+  const config = loadOrCreateUnifiedConfig();
+
+  // Priority 1: Global cliproxy.auth
+  if (config.cliproxy.auth?.management_secret) {
+    return config.cliproxy.auth.management_secret;
+  }
+
+  // Priority 2: Default constant (backwards compatible)
+  return CCS_CONTROL_PANEL_SECRET;
+}
+
+/**
+ * Set global API key.
+ * Updates cliproxy.auth.api_key in config.yaml.
+ *
+ * @param apiKey - New API key (or undefined to reset to default)
+ */
+export function setGlobalApiKey(apiKey: string | undefined): void {
+  const config = loadOrCreateUnifiedConfig();
+
+  if (!config.cliproxy.auth) {
+    config.cliproxy.auth = {};
+  }
+
+  if (apiKey === undefined) {
+    delete config.cliproxy.auth.api_key;
+  } else {
+    config.cliproxy.auth.api_key = apiKey;
+  }
+
+  saveUnifiedConfig(config);
+}
+
+/**
+ * Set global management secret.
+ * Updates cliproxy.auth.management_secret in config.yaml.
+ *
+ * @param secret - New management secret (or undefined to reset to default)
+ */
+export function setGlobalManagementSecret(secret: string | undefined): void {
+  const config = loadOrCreateUnifiedConfig();
+
+  if (!config.cliproxy.auth) {
+    config.cliproxy.auth = {};
+  }
+
+  if (secret === undefined) {
+    delete config.cliproxy.auth.management_secret;
+  } else {
+    config.cliproxy.auth.management_secret = secret;
+  }
+
+  saveUnifiedConfig(config);
+}
+
+/**
+ * Set per-variant API key override.
+ * Updates variants[variantName].auth.api_key in config.yaml.
+ *
+ * @param variantName - Variant name
+ * @param apiKey - New API key (or undefined to remove override)
+ */
+export function setVariantApiKey(variantName: string, apiKey: string | undefined): void {
+  const config = loadOrCreateUnifiedConfig();
+  const variant = config.cliproxy.variants[variantName];
+
+  if (!variant) {
+    throw new Error(`Variant '${variantName}' not found`);
+  }
+
+  if (!variant.auth) {
+    variant.auth = {};
+  }
+
+  if (apiKey === undefined) {
+    delete variant.auth.api_key;
+    // Clean up empty auth object
+    if (Object.keys(variant.auth).length === 0) {
+      delete variant.auth;
+    }
+  } else {
+    variant.auth.api_key = apiKey;
+  }
+
+  saveUnifiedConfig(config);
+}
+
+/**
+ * Reset all auth settings to defaults.
+ * Removes cliproxy.auth and all variant auth overrides.
+ */
+export function resetAuthToDefaults(): void {
+  const config = loadOrCreateUnifiedConfig();
+
+  // Remove global auth
+  delete config.cliproxy.auth;
+
+  // Remove all variant auth overrides
+  for (const variantName of Object.keys(config.cliproxy.variants)) {
+    const variant = config.cliproxy.variants[variantName];
+    if (variant.auth) {
+      delete variant.auth;
+    }
+  }
+
+  saveUnifiedConfig(config);
+}
+
+/**
+ * Get auth configuration summary for display.
+ * Returns current effective values and whether they're customized.
+ */
+export function getAuthSummary(): {
+  apiKey: { value: string; isCustom: boolean };
+  managementSecret: { value: string; isCustom: boolean };
+} {
+  const config = loadOrCreateUnifiedConfig();
+
+  const customApiKey = config.cliproxy.auth?.api_key;
+  const customSecret = config.cliproxy.auth?.management_secret;
+
+  return {
+    apiKey: {
+      value: customApiKey || CCS_INTERNAL_API_KEY,
+      isCustom: !!customApiKey,
+    },
+    managementSecret: {
+      value: customSecret || CCS_CONTROL_PANEL_SECRET,
+      isCustom: !!customSecret,
+    },
+  };
+}

src/cliproxy/index.ts

@@ -135,3 +135,16 @@ export { detectRunningProxy, waitForProxyHealthy, reclaimOrphanedProxy } from '.
 // Startup lock (prevents race conditions between CCS processes)
 export type { LockResult } from './startup-lock';
 export { acquireStartupLock, withStartupLock } from './startup-lock';
+
+// Auth token manager (customizable API key and management secret)
+export {
+  generateSecureToken,
+  maskToken,
+  getEffectiveApiKey,
+  getEffectiveManagementSecret,
+  setGlobalApiKey,
+  setGlobalManagementSecret,
+  setVariantApiKey,
+  resetAuthToDefaults,
+  getAuthSummary,
+} from './auth-token-manager';