feat: integrate MarkBase Settings API (GET/POST /api/v2/settings)

- Replaced deprecated /api/v2/config with new /api/v2/settings
- loadSettings() now uses GET /api/v2/settings (structured JSON)
- saveUploadPath() now uses POST /api/v2/settings
- Removed PostgreSQL migration error handling (no longer needed)
- Settings page now works correctly with SQLite-only MarkBase

src/views/AdminView.vue

@@ -1036,18 +1036,11 @@ async function loadSettings() {
   settingsError.value = ''
   saveMessage.value = ''
   try {
-    const resp = await fetch(`${markbaseUrl.value}/api/v2/config`)
-    if (!resp.ok) {
-      const errData = await resp.json().catch(() => null)
-      const errMsg = errData?.error || resp.statusText || ''
-      // MarkBase config may return 500 if still running old version requiring postgresql
-      if (errMsg.includes('postgresql')) {
-        throw new Error('MarkBase needs restart (PostgreSQL→SQLite migration)')
-      }
-      throw new Error(`HTTP ${resp.status}: ${errMsg}`)
-    }
-    const cfg = await resp.json()
-    uploadPath.value = cfg.server?.upload_path || ''
+    const resp = await fetch(`${markbaseUrl.value}/api/v2/settings`)
+    if (!resp.ok) throw new Error(`HTTP ${resp.status}`)
+    const data = await resp.json()
+    if (!data.success) throw new Error(data.error || 'Failed to load settings')
+    uploadPath.value = data.settings?.server?.upload_path || ''
   } catch (e: any) {
     settingsError.value = 'Failed to load settings: ' + (e.message || e)
   }
@@ -1058,9 +1051,13 @@ async function saveUploadPath() {
   saveMessage.value = ''
   saveError.value = false
   try {
-    const resp = await fetch(`${markbaseUrl.value}/api/v2/config/edit?key=server.upload_path&value=${encodeURIComponent(uploadPath.value)}`, { method: 'POST' })
+    const resp = await fetch(`${markbaseUrl.value}/api/v2/settings`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ server: { upload_path: uploadPath.value } })
+    })
     const data = await resp.json()
-    if (data.ok) {
+    if (data.success) {
       saveMessage.value = 'Upload path saved successfully'
     } else {
       saveError.value = true