license: fix device re-register appKey update, add license file parser

- DeviceService.register(): update appKey when device switches to a different app
  and adjust registered device counters for old/new appKey
- LicenseAdminController: fix updateAppLicense parameter count mismatch
- AppController: add POST /api/apps/license/parse endpoint for license file decryption
- SecurityCenterView: add License file parser UI with upload and paste support
- appApi: add parseLicenseFile() method

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

license-service/src/main/java/com/xuqm/license/controller/LicenseAdminController.java

@@ -51,7 +51,7 @@ public class LicenseAdminController {
             }
         }
         AppLicenseEntity updated = appLicenseService.update(
-                appKey, null, req.maxDevices(), newExpiresAt, clearExpiresAt, req.isActive(), req.remark());
+                appKey, null, req.maxDevices(), newExpiresAt, clearExpiresAt, req.isActive(), req.remark(), null, null, null);
         return ResponseEntity.ok(ApiResponse.success(updated));
     }
 

license-service/src/main/java/com/xuqm/license/service/DeviceService.java

@@ -58,8 +58,14 @@ public class DeviceService {
             // Re-issue token
             String token = licenseAuthService.generateToken(appKey, deviceId, existing.getId());
             String tokenHash = hashToken(token);
-            if (existing.getAppKey() == null || existing.getAppKey().isBlank()) {
+            String oldAppKey = existing.getAppKey();
+            if (oldAppKey == null || oldAppKey.isBlank()) {
                 existing.setAppKey(appKey);
+            } else if (!oldAppKey.equals(appKey)) {
+                // Device switched to a different app: update appKey and adjust counters
+                existing.setAppKey(appKey);
+                appLicenseService.decrementRegisteredDevices(oldAppKey);
+                appLicenseService.incrementRegisteredDevices(appKey);
             }
             existing.setDeviceName(firstNonBlank(deviceName, existing.getDeviceName()));
             existing.setDeviceModel(firstNonBlank(deviceModel, existing.getDeviceModel()));

tenant-service/src/main/java/com/xuqm/tenant/controller/AppController.java

@@ -2,6 +2,7 @@ package com.xuqm.tenant.controller;
 
 import com.xuqm.common.model.ApiResponse;
 import com.xuqm.common.exception.BusinessException;
+import com.xuqm.common.security.LicenseFileCrypto;
 import com.xuqm.tenant.dto.CreateAppRequest;
 import com.xuqm.tenant.entity.AppEntity;
 import com.xuqm.tenant.entity.FeatureServiceEntity;
@@ -174,6 +175,34 @@ public class AppController {
                 .body(encrypted.getBytes(java.nio.charset.StandardCharsets.UTF_8));
     }
 
+    /**
+     * Parse an uploaded license file and return its decrypted contents.
+     * Used by the security center to verify license file information.
+     */
+    @PostMapping("/license/parse")
+    public ResponseEntity<ApiResponse<Map<String, Object>>> parseLicenseFile(@RequestBody Map<String, String> body) {
+        String content = body.get("content");
+        if (content == null || content.isBlank()) {
+            throw new BusinessException("License file content is required");
+        }
+        try {
+            LicenseFileCrypto.LicensePayload payload = LicenseFileCrypto.decrypt(content.trim());
+            Map<String, Object> data = new java.util.LinkedHashMap<>();
+            data.put("appKey", payload.appKey());
+            data.put("appName", payload.appName());
+            data.put("packageName", payload.packageName());
+            data.put("iosBundleId", payload.iosBundleId());
+            data.put("harmonyBundleName", payload.harmonyBundleName());
+            data.put("baseUrl", payload.baseUrl());
+            data.put("serverUrl", payload.serverUrl());
+            return ResponseEntity.ok(ApiResponse.success(data));
+        } catch (IllegalArgumentException e) {
+            throw new BusinessException("Invalid license file: " + e.getMessage());
+        } catch (Exception e) {
+            throw new BusinessException("Failed to parse license file: " + e.getMessage());
+        }
+    }
+
     private static String sanitizeFileName(String value) {
         String name = value == null || value.isBlank() ? "license" : value.trim();
         return name.replaceAll("[\\\\/:*?\"<>|\\s]+", "_");