Settings: Push SMB settings to Rust on change

- Add typed wrappers `setDirectSmbConnection`, `setFilterSafeSaveArtifacts`, `setSmbConcurrency` in `$lib/tauri-commands/settings.ts` and re-export via the barrel.
- Wire three new `case` arms in `settings-applier.ts` so `network.directSmbConnection`, `advanced.filterSafeSaveArtifacts`, and `network.smbConcurrency` push to the backend immediately on every change. No more restart needed.

Author: vdavid

apps/desktop/src/lib/settings/settings-applier.ts

@@ -11,6 +11,9 @@ import {
   setIndexingEnabled,
   setMtpEnabled,
   setDiskSpaceThreshold,
+  setDirectSmbConnection,
+  setFilterSafeSaveArtifacts,
+  setSmbConcurrency,
 } from '$lib/tauri-commands'
 
 const log = getAppLogger('settings-applier')
@@ -95,6 +98,18 @@ function handleSettingChange(id: string, value: unknown): void {
       // Update disk space poller threshold
       void setDiskSpaceThreshold(value as number)
       break
+    case 'network.directSmbConnection':
+      // Flip the backend flag that controls auto-upgrading SMB mounts to smb2
+      void setDirectSmbConnection(value as boolean)
+      break
+    case 'advanced.filterSafeSaveArtifacts':
+      // Toggle .sb-* noise filtering in the SMB watcher
+      void setFilterSafeSaveArtifacts(value as boolean)
+      break
+    case 'network.smbConcurrency':
+      // Update SMB batch-copy concurrency (backend clamps 1..=32)
+      void setSmbConcurrency(value as number)
+      break
     // MCP server (developer.mcpEnabled, developer.mcpPort) is handled directly
     // by McpServerSection.svelte in the settings window, not here. This avoids
     // double-firing since both windows receive setting change events.

apps/desktop/src/lib/tauri-commands/index.ts

@@ -283,6 +283,9 @@ export {
   getMcpPort,
   updateFileWatcherDebounce,
   updateServiceResolveTimeout,
+  setDirectSmbConnection,
+  setFilterSafeSaveArtifacts,
+  setSmbConcurrency,
   setIndexingEnabled,
   getDirStatsBatch,
   getE2eStartPath,

apps/desktop/src/lib/tauri-commands/settings.ts

@@ -43,6 +43,34 @@ export async function updateServiceResolveTimeout(timeoutMs: number): Promise<vo
   await invoke('update_service_resolve_timeout', { timeoutMs })
 }
 
+/**
+ * Enables or disables automatic upgrade of SMB mounts to direct smb2 connections.
+ * Pushed live from the settings UI whenever `network.directSmbConnection` changes.
+ * @param enabled - True to enable direct SMB connections
+ */
+export async function setDirectSmbConnection(enabled: boolean): Promise<void> {
+  await invoke('set_direct_smb_connection', { enabled })
+}
+
+/**
+ * Toggles filtering of macOS safe-save artifacts (`.sb-*` files) in the SMB watcher.
+ * Pushed live from the settings UI whenever `advanced.filterSafeSaveArtifacts` changes.
+ * @param enabled - True to filter artifacts
+ */
+export async function setFilterSafeSaveArtifacts(enabled: boolean): Promise<void> {
+  await invoke('set_filter_safe_save_artifacts_cmd', { enabled })
+}
+
+/**
+ * Updates the SMB concurrency limit used by the batch copy engine.
+ * Clamped to `1..=32` in the Rust side. Pushed live from the settings UI
+ * whenever `network.smbConcurrency` changes.
+ * @param value - Desired concurrency (will be clamped)
+ */
+export async function setSmbConcurrency(value: number): Promise<void> {
+  await invoke('set_smb_concurrency_cmd', { value })
+}
+
 // ============================================================================
 // MCP server commands
 // ============================================================================