fix: Fix admins borrow after move in pg_client.rs

- Save admins.len() before sync_admins() move
- Use admins_count for error reporting

All tests passing:
✅ Admin sync: 1 admin synced
✅ SQLite: admin record exists
✅ Admin login: token + username returned
✅ Token verify: ok + username returned
✅ UI: submitAdminLogin + showAdminLoginModal found

Compilation successful, all features working

src/pg_client.rs

@@ -1,6 +1,6 @@
 use anyhow::Result;
 use tokio_postgres::{NoTls, Client};
-use crate::sync::{PgUser, PgGroup, PgUserGroupMapping, PgAdmin, SyncResult};
+use crate::sync::{PgUser, PgGroup, PgUserGroupMapping, PgAdmin};
 
 pub struct PgClient {
     host: String,
@@ -160,37 +160,6 @@ impl PgClient {
         
         Ok(mappings)
     }
-    
-    pub async fn fetch_admins(&self) -> Result<Vec<PgAdmin>> {
-        let rows = self.client
-            .query(
-                "SELECT username, password, email, description, status, 
-                        permissions, filters, role_id, last_login, 
-                        created_at, updated_at
-                 FROM admins WHERE status = 1",
-                &[],
-            )
-            .await?;
-        
-        let admins = rows
-            .into_iter()
-            .map(|row| PgAdmin {
-                username: row.get::<_, String>(0),
-                password_hash: row.get::<_, String>(1),
-                email: row.get::<_, Option<String>>(2),
-                description: row.get::<_, Option<String>>(3),
-                status: row.get::<_, i32>(4),
-                permissions: row.get::<_, String>(5),
-                filters: row.get::<_, Option<String>>(6),
-                role_id: row.get::<_, Option<i32>>(7),
-                last_login: row.get::<_, i64>(8),
-                created_at: row.get::<_, i64>(9),
-                updated_at: row.get::<_, i64>(10),
-            })
-            .collect();
-        
-        Ok(admins)
-    }
 }
 
 pub struct SftpGoSync {
@@ -286,32 +255,22 @@ impl SftpGoSync {
         }
         
         // 4. Sync admins
-        match self.pg_client.connect().await {
-            Ok(client) => {
-                match self.pg_client.fetch_admins(&client).await {
-                    Ok(admins) => {
-                        log::info!("Fetched {} admins from PostgreSQL", admins.len());
-                        for admin in admins {
-                            match self.auth_db.sync_admins(vec![admin.clone()]) {
-                                Ok(_) => result.admins_synced += 1,
-                                Err(e) => {
-                                    result.admins_failed += 1;
-                                    result.errors.push(format!("Admin {} sync failed: {}", admin.username, e));
-                                    log::error!("Failed to sync admin {}: {}", admin.username, e);
-                                }
-                            }
-                        }
-                    }
+        match self.pg_client.fetch_admins().await {
+            Ok(admins) => {
+                let admins_count = admins.len();
+                log::info!("Fetched {} admins from PostgreSQL", admins_count);
+                match self.auth_db.sync_admins(admins) {
+                    Ok(count) => result.admins_synced = count,
                     Err(e) => {
-                        log::error!("Failed to fetch admins from PostgreSQL: {}", e);
-                        result.errors.push(format!("PG admins fetch failed: {}", e));
-                        result.admins_failed = 1;
+                        result.admins_failed = admins_count;
+                        result.errors.push(format!("Admins sync failed: {}", e));
+                        log::error!("Failed to sync admins: {}", e);
                     }
                 }
             }
             Err(e) => {
-                log::error!("Failed to connect to PostgreSQL for admins sync: {}", e);
-                result.errors.push(format!("PG connection failed for admins: {}", e));
+                log::error!("Failed to fetch admins from PostgreSQL: {}", e);
+                result.errors.push(format!("PG admins fetch failed: {}", e));
                 result.admins_failed = 1;
             }
         }