Fix blank screen on server cert settings page (missing authentication)

Critical Bug Fix: Server cert settings page blank screen

Problem:
- Navigating to /settings/endpoints/server-cert showed blank page
- Both localhost:5173 and localhost:5001 affected
- Browser console showed authentication errors

Root Cause:
- ServerCertSettings.vue used raw fetch() without authentication
- API endpoint requires admin role (@require_role('admin'))
- fetch() didn't include JWT bearer token from cookies
- API returned 401 Unauthorized, component failed silently

Solution:
- Converted from Options API to Composition API (Vue 3 standard)
- Changed from raw fetch() to authenticated api client
- Used 'import api from @/api' (same as AgentKeySettings.vue)

Changes:
Before (broken):
  export default {
    methods: {
      async loadCertificate() {
        const response = await fetch('/api/endpoints/settings/server-cert')
        // No auth headers = 401 error
      }
    }
  }

After (working):
  import { ref, onMounted } from 'vue'
  import api from '@/api'

  async function loadCertificate() {
    const response = await api.get('/endpoints/settings/server-cert')
    // api.get() includes JWT from cookie automatically
  }

API Client Features:
- Automatically includes Authorization header with JWT
- Handles response parsing
- Consistent error handling
- Used by all other admin settings pages

Result:
- Page loads successfully
- Certificate details display
- Generate/upload forms work
- All admin-only endpoints authenticated

Tested:
- Hard refresh clears browser cache
- Page renders certificate details
- Generate/upload buttons functional

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

plugins/endpoints/frontend/views/ServerCertSettings.vue

@@ -268,53 +268,52 @@
   </div>
 </template>
 
-<script>
+<script setup>
-export default {
+import { ref, onMounted } from 'vue'
-  name: 'ServerCertSettings',
+import api from '@/api'
-  data() {
+
-    return {
+const loading = ref(false)
-      loading: false,
+const busy = ref(false)
-      busy: false,
+const message = ref('')
-      message: '',
+const error = ref('')
-      error: '',
+const cert = ref(null)
-      cert: null,
+const thumbprintCopied = ref(false)
-      thumbprintCopied: false,
+
-      generateForm: {
+const generateForm = ref({
   cn: 'localhost',
   san: 'DNS:localhost,IP:192.168.100.1',
   days: 365
-      },
+})
-      uploadForm: {
+
+const uploadForm = ref({
   certFile: null,
   keyFile: null
-      }
+})
-    }
+
-  },
+onMounted(() => {
-  mounted() {
+  loadCertificate()
-    this.loadCertificate()
+})
-  },
+
-  methods: {
+async function loadCertificate() {
-    async loadCertificate() {
+  loading.value = true
-      this.loading = true
+  error.value = ''
-      this.error = ''
   try {
-        const response = await fetch('/api/endpoints/settings/server-cert')
+    const response = await api.get('/endpoints/settings/server-cert')
-        const data = await response.json()
+    if (response.data.status === 'success') {
-        if (data.status === 'success') {
+      cert.value = response.data.data
-          this.cert = data.data
     } else {
-          this.error = data.data?.error?.message || 'Failed to load certificate'
+      error.value = response.data.data?.error?.message || 'Failed to load certificate'
     }
   } catch (err) {
-        this.error = `Failed to load certificate: ${err.message}`
+    error.value = `Failed to load certificate: ${err.message}`
   } finally {
-        this.loading = false
+    loading.value = false
   }
-    },
+}
 
-    async generateCertificate() {
+async function generateCertificate() {
-      if (!this.generateForm.cn) {
+  if (!generateForm.value.cn) {
-        this.error = 'Common Name is required'
+    error.value = 'Common Name is required'
     return
   }
 
@@ -325,43 +324,37 @@ export default {
     return
   }
 
-      this.busy = true
+  busy.value = true
-      this.error = ''
+  error.value = ''
-      this.message = ''
+  message.value = ''
 
   try {
-        const response = await fetch('/api/endpoints/settings/server-cert/generate', {
+    const response = await api.post('/endpoints/settings/server-cert/generate', generateForm.value)
-          method: 'POST',
-          headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify(this.generateForm)
-        })
 
-        const data = await response.json()
+    if (response.data.status === 'success') {
-
+      message.value = 'Certificate generated successfully. Nginx is restarting...'
-        if (data.status === 'success') {
+      await loadCertificate()
-          this.message = 'Certificate generated successfully. Nginx is restarting...'
-          await this.loadCertificate()
     } else {
-          this.error = data.data?.error?.message || 'Failed to generate certificate'
+      error.value = response.data.data?.error?.message || 'Failed to generate certificate'
     }
   } catch (err) {
-        this.error = `Failed to generate certificate: ${err.message}`
+    error.value = `Failed to generate certificate: ${err.message}`
   } finally {
-        this.busy = false
+    busy.value = false
   }
-    },
+}
 
-    onCertFileChange(event) {
+function onCertFileChange(event) {
-      this.uploadForm.certFile = event.target.files[0]
+  uploadForm.value.certFile = event.target.files[0]
-    },
+}
 
-    onKeyFileChange(event) {
+function onKeyFileChange(event) {
-      this.uploadForm.keyFile = event.target.files[0]
+  uploadForm.value.keyFile = event.target.files[0]
-    },
+}
 
-    async uploadCertificate() {
+async function uploadCertificate() {
-      if (!this.uploadForm.certFile || !this.uploadForm.keyFile) {
+  if (!uploadForm.value.certFile || !uploadForm.value.keyFile) {
-        this.error = 'Both certificate and private key files are required'
+    error.value = 'Both certificate and private key files are required'
     return
   }
 
@@ -371,54 +364,51 @@ export default {
     return
   }
 
-      this.busy = true
+  busy.value = true
-      this.error = ''
+  error.value = ''
-      this.message = ''
+  message.value = ''
 
   try {
     const formData = new FormData()
-        formData.append('cert', this.uploadForm.certFile)
+    formData.append('cert', uploadForm.value.certFile)
-        formData.append('key', this.uploadForm.keyFile)
+    formData.append('key', uploadForm.value.keyFile)
 
-        const response = await fetch('/api/endpoints/settings/server-cert/upload', {
+    const response = await api.post('/endpoints/settings/server-cert/upload', formData, {
-          method: 'POST',
+      headers: {
-          body: formData
+        'Content-Type': 'multipart/form-data'
+      }
     })
 
-        const data = await response.json()
+    if (response.data.status === 'success') {
-
+      message.value = 'Certificate uploaded successfully. Nginx is restarting...'
-        if (data.status === 'success') {
+      await loadCertificate()
-          this.message = 'Certificate uploaded successfully. Nginx is restarting...'
-          await this.loadCertificate()
       // Clear file inputs
       document.getElementById('cert-file').value = ''
       document.getElementById('key-file').value = ''
-          this.uploadForm.certFile = null
+      uploadForm.value.certFile = null
-          this.uploadForm.keyFile = null
+      uploadForm.value.keyFile = null
     } else {
-          this.error = data.data?.error?.message || 'Failed to upload certificate'
+      error.value = response.data.data?.error?.message || 'Failed to upload certificate'
     }
   } catch (err) {
-        this.error = `Failed to upload certificate: ${err.message}`
+    error.value = `Failed to upload certificate: ${err.message}`
   } finally {
-        this.busy = false
+    busy.value = false
   }
-    },
+}
 
-    copyThumbprint() {
+function copyThumbprint() {
-      navigator.clipboard.writeText(this.cert.thumbprint)
+  navigator.clipboard.writeText(cert.value.thumbprint)
-      this.thumbprintCopied = true
+  thumbprintCopied.value = true
   setTimeout(() => {
-        this.thumbprintCopied = false
+    thumbprintCopied.value = false
   }, 2000)
-    },
+}
 
-    formatDate(dateString) {
+function formatDate(dateString) {
   if (!dateString) return 'N/A'
   const date = new Date(dateString)
   return date.toLocaleString()
-    }
-  }
 }
 </script>