refactor: reorganize client transport and extension internals

- Split client, native, remote, serve, markdown, and SDK internals into focused packages with direct imports.
- Move local and remote transport framing/protocol helpers behind clearer module boundaries.
- Break up the extension injected DOM logic into a separate content dispatch bundle and dedicated content modules.
- Add explicit client handling for passive remote discovery without noisy PQ warnings.
- Keep behavior covered with updated unit, integration, and extension tests.

extension/src/classes/NativeConnection.ts

@@ -9,6 +9,11 @@ import type { SessionCommands } from '../commands/session';
 import type { ControlMessage, ResponseMessage, IncomingMessage, PageRequest, DispatchArgs, Serializable } from '../types';
 
 const NATIVE_HOST = "com.browsercli.host";
+const DEBUG_LOG = false;
+
+function debugLog(...args: Serializable[]) {
+  if (DEBUG_LOG) console.log("[browser-cli]", ...args);
+}
 
 export class NativeConnection {
   private port: chrome.runtime.Port | null = null;
@@ -96,7 +101,7 @@ export class NativeConnection {
       // Send hello so native host knows which profile/alias this is
       const alias = await getProfileAlias();
       nativePort.postMessage({ type: "hello", alias });
-      console.log("[browser-cli] Connected to native host as profile:", alias);
+      debugLog("Connected to native host as profile:", alias);
     } catch (e) {
       this.port = null;
       console.error("[browser-cli] Failed to connect:", e);
@@ -112,7 +117,7 @@ export class NativeConnection {
     // on the captured port and bail if it (or this.port) is already gone.
     const replyPort = this.port;
 
-    console.log("[browser-cli] ←", command, args);
+    debugLog("←", command, args);
 
     let data: Serializable, error: string | undefined;
     try {
@@ -131,10 +136,10 @@ export class NativeConnection {
     }
 
     if (error !== undefined) {
-      console.log("[browser-cli] → ERROR", command, error);
+      debugLog("→ ERROR", command, error);
       this.sendResponse(replyPort, { id, success: false, error });
     } else {
-      console.log("[browser-cli] →", command, data);
+      debugLog("→", command, data);
       this.sendResponse(replyPort, { id, success: true, data });
     }