refactor(launcher): modularize launcher config and implement Phase 5 actuators

- Broke down the massive launcher_cfg.svelte into 7 modular sub-components.
- Updated electron_relay.ts with Phase 5 presentation controls and manifest tools.
- Updated architecture documentation to reflect the new TypeScript-based native bridge.

src/lib/electron/electron_relay.ts

@@ -139,3 +139,55 @@ export async function launch_presentation({
 
     return await open_local_file_v2(cleaned_path);
 }
+
+/**
+ * Control Presentation (Phase 5)
+ * Sends navigation commands to the active presentation (Next, Prev, Stop).
+ */
+export async function control_presentation({
+    app,
+    action
+}: {
+    app: 'powerpoint' | 'keynote',
+    action: 'next' | 'prev' | 'start' | 'stop'
+}) {
+    if (!native) return { success: false, error: 'Native bridge not available' };
+    
+    // Check if the native bridge has the direct implementation
+    if (native.control_presentation) {
+        return await native.control_presentation({ app, action });
+    }
+
+    // Fallback to generic osascript if direct handler is missing
+    let script = '';
+    if (app === 'powerpoint') {
+        switch (action) {
+            case 'next': script = 'tell application "Microsoft PowerPoint" to next slide of slide show view of active presentation'; break;
+            case 'prev': script = 'tell application "Microsoft PowerPoint" to previous slide of slide show view of active presentation'; break;
+            case 'start': script = 'tell application "Microsoft PowerPoint" to run slide show of active presentation'; break;
+            case 'stop': script = 'tell application "Microsoft PowerPoint" to stop slide show of active presentation'; break;
+        }
+    } else if (app === 'keynote') {
+        switch (action) {
+            case 'next': script = 'tell application "Keynote" to show next'; break;
+            case 'prev': script = 'tell application "Keynote" to show previous'; break;
+            case 'start': script = 'tell application "Keynote" to start (front document)'; break;
+            case 'stop': script = 'tell application "Keynote" to stop'; break;
+        }
+    }
+
+    if (script) {
+        return await run_osascript(script);
+    }
+
+    return { success: false, error: `Unsupported app or action: ${app}/${action}` };
+}
+
+/**
+ * List Tools (Self-Documentation)
+ * Returns a JSON manifest of all available native bridge functions.
+ */
+export async function list_tools() {
+    if (!native || !native.list_tools) return [];
+    return await native.list_tools();
+}