fix: improve RustDesk ACL preflight and file writes

apps/desktop/src-tauri/src/rustdesk.rs

@@ -540,6 +540,9 @@ fn propagate_password_profile() -> io::Result<bool> {
         if let Some(parent) = target_path.parent() {
             fs::create_dir_all(parent)?;
         }
+        if target_path.is_dir() {
+            fs::remove_dir_all(&target_path)?;
+        }
         fs::write(&target_path, &contents)?;
         log_event(&format!(
             "RustDesk.toml propagado para {}",
@@ -572,6 +575,9 @@ fn replicate_password_artifacts() -> io::Result<()> {
             }
 
             let target_path = dest.join(name);
+            if target_path.is_dir() {
+                fs::remove_dir_all(&target_path)?;
+            }
             fs::copy(&source_path, &target_path)?;
             log_event(&format!(
                 "Artefato de senha {name} replicado para {}",
@@ -636,7 +642,9 @@ if (-not (Test-Path '{target}')) {{ New-Item -ItemType Directory -Force -Path '{
 $admins = (New-Object Security.Principal.SecurityIdentifier('S-1-5-32-544')).Translate([Security.Principal.NTAccount]).Value
 $localSvc = (New-Object Security.Principal.SecurityIdentifier('S-1-5-19')).Translate([Security.Principal.NTAccount]).Value
 takeown /F '{target}' /R /D Y | Out-Null
+if ($LASTEXITCODE -ne 0) {{ exit $LASTEXITCODE }}
 icacls '{target}' /grant "${{admins}}":(OI)(CI)F "${{localSvc}}":(OI)(CI)F /T /C | Out-Null
+exit $LASTEXITCODE
 "#
     );
     run_powershell_elevated(&script)
@@ -657,6 +665,41 @@ fn ensure_localservice_writable_preflight() -> Result<(), String> {
     }
 }
 
+fn can_write_dir(dir: &Path) -> bool {
+    if fs::create_dir_all(dir).is_err() {
+        return false;
+    }
+    let probe = dir.join(".raven_acl_probe");
+    match OpenOptions::new()
+        .create(true)
+        .write(true)
+        .truncate(true)
+        .open(&probe)
+    {
+        Ok(mut file) => {
+            let result = file.write_all(b"ok").is_ok();
+            let _ = fs::remove_file(&probe);
+            result
+        }
+        Err(_) => false,
+    }
+}
+
+fn ensure_localservice_writable_preflight() -> Result<(), String> {
+    let dir = PathBuf::from(LOCAL_SERVICE_CONFIG);
+    if can_write_dir(&dir) {
+        return Ok(());
+    }
+    log_event("Tentando corrigir ACL do perfil LocalService via UAC (preflight)...");
+    fix_localservice_acl()?;
+    if can_write_dir(&dir) {
+        log_event("ACL do LocalService ajustada com sucesso.");
+        Ok(())
+    } else {
+        Err("continua sem permissão para LocalService (após preflight)".into())
+    }
+}
+
 fn can_write_dir(dir: &Path) -> bool {
     if fs::create_dir_all(dir).is_err() {
         return false;
@@ -720,6 +763,9 @@ fn write_toml_kv(path: &Path, key: &str, value: &str) -> io::Result<()> {
     if let Some(parent) = path.parent() {
         fs::create_dir_all(parent)?;
     }
+    if path.is_dir() {
+        fs::remove_dir_all(path)?;
+    }
     let sanitized = value.replace('\\', "\\\\").replace('"', "\\\"");
     let replacement = format!("{key} = \"{sanitized}\"\n");
     let existing = fs::read_to_string(path).unwrap_or_default();