Fix brand theme application and add comprehensive translations

- Fixed theme not being reflected on gallery and admin login pages
- Created GlobalThemeProvider to apply themes globally
- Updated gallery and admin login pages to use dynamic CSS variables
- Added complete translations for all admin sections in English and German:
  - Notifications management
  - Event view and creation
  - Photo upload functionality
  - Category management
  - Archive page view
  - Analytics dashboard
  - Branding and theme settings
  - System settings
  - CMS page management
  - Email configuration
- Fixed admin photo management display issues
- Fixed photo upload category assignment
- Added password reset functionality for galleries
- Improved error handling and user feedback

🤖 Generated with [Claude Code](https://claude.ai/code)

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

frontend/package-lock.json

@@ -12,6 +12,7 @@
         "@tiptap/extension-link": "^2.25.0",
         "@tiptap/react": "^2.25.0",
         "@tiptap/starter-kit": "^2.25.0",
+        "@types/react-google-recaptcha": "^2.1.9",
         "axios": "^1.3.2",
         "clsx": "^2.0.0",
         "date-fns": "^2.29.3",
@@ -23,6 +24,7 @@
         "react": "^18.3.1",
         "react-countdown": "^2.3.5",
         "react-dom": "^18.3.1",
+        "react-google-recaptcha": "^3.1.0",
         "react-i18next": "^15.6.0",
         "react-image-gallery": "^1.2.11",
         "react-intersection-observer": "^9.4.3",
@@ -1962,14 +1964,12 @@
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       "resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.15.tgz",
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-      "dev": true,
       "license": "MIT"
     },
     "node_modules/@types/react": {
       "version": "18.3.23",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-18.3.23.tgz",
       "integrity": "sha512-/LDXMQh55EzZQ0uVAZmKKhfENivEvWz6E+EYzh+/MCjMhNsotd+ZHhBGIjFDTi6+fz0OhQQQLbTgdQIxxCsC0w==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@types/prop-types": "*",
@@ -1986,6 +1986,15 @@
         "@types/react": "^18.0.0"
       }
     },
+    "node_modules/@types/react-google-recaptcha": {
+      "version": "2.1.9",
+      "resolved": "https://registry.npmjs.org/@types/react-google-recaptcha/-/react-google-recaptcha-2.1.9.tgz",
+      "integrity": "sha512-nT31LrBDuoSZJN4QuwtQSF3O89FVHC4jLhM+NtKEmVF5R1e8OY0Jo4//x2Yapn2aNHguwgX5doAq8Zo+Ehd0ug==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/react": "*"
+      }
+    },
     "node_modules/@types/use-sync-external-store": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/@types/use-sync-external-store/-/use-sync-external-store-0.0.6.tgz",
@@ -2739,7 +2748,6 @@
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
       "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/date-fns": {
@@ -3542,6 +3550,15 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/hoist-non-react-statics": {
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/hoist-non-react-statics/-/hoist-non-react-statics-3.3.2.tgz",
+      "integrity": "sha512-/gGivxi8JPKWNm/W0jSmzcMPpfpPLc3dY/6GxhX2hQ9iGj3aDfklV4ET7NjKpSinLpJ5vafa9iiGIEZg10SfBw==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "react-is": "^16.7.0"
+      }
+    },
     "node_modules/html-parse-stringify": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/html-parse-stringify/-/html-parse-stringify-3.0.1.tgz",
@@ -4732,6 +4749,19 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/react-async-script": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/react-async-script/-/react-async-script-1.2.0.tgz",
+      "integrity": "sha512-bCpkbm9JiAuMGhkqoAiC0lLkb40DJ0HOEJIku+9JDjxX3Rcs+ztEOG13wbrOskt3n2DTrjshhaQ/iay+SnGg5Q==",
+      "license": "MIT",
+      "dependencies": {
+        "hoist-non-react-statics": "^3.3.0",
+        "prop-types": "^15.5.0"
+      },
+      "peerDependencies": {
+        "react": ">=16.4.1"
+      }
+    },
     "node_modules/react-countdown": {
       "version": "2.3.6",
       "resolved": "https://registry.npmjs.org/react-countdown/-/react-countdown-2.3.6.tgz",
@@ -4758,6 +4788,19 @@
         "react": "^18.3.1"
       }
     },
+    "node_modules/react-google-recaptcha": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/react-google-recaptcha/-/react-google-recaptcha-3.1.0.tgz",
+      "integrity": "sha512-cYW2/DWas8nEKZGD7SCu9BSuVz8iOcOLHChHyi7upUuVhkpkhYG/6N3KDiTQ3XAiZ2UAZkfvYKMfAHOzBOcGEg==",
+      "license": "MIT",
+      "dependencies": {
+        "prop-types": "^15.5.0",
+        "react-async-script": "^1.2.0"
+      },
+      "peerDependencies": {
+        "react": ">=16.4.1"
+      }
+    },
     "node_modules/react-i18next": {
       "version": "15.6.0",
       "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-15.6.0.tgz",
@@ -5425,7 +5468,7 @@
       "version": "5.8.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
       "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
-      "dev": true,
+      "devOptional": true,
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",