refactor: optimize matrix channel — optional deps, trim comments, simplify methods

README.md

@@ -312,7 +312,11 @@ nanobot gateway
 <details>
 <summary><b>Matrix (Element)</b></summary>
 
-Uses Matrix sync via `matrix-nio` (inbound media + outbound file attachments).
+Install Matrix dependencies first:
+
+```bash
+pip install nanobot-ai[matrix]
+```
 
 **1. Create/choose a Matrix account**
 

nanobot/agent/loop.py

@@ -229,8 +229,6 @@ class AgentLoop:
                     )
             else:
                 clean = self._strip_think(response.content)
-                if on_progress and clean:
-                    await on_progress(clean)
                 messages = self.context.add_assistant_message(
                     messages, clean, reasoning_content=response.reasoning_content,
                 )

pyproject.toml

@@ -42,12 +42,14 @@ dependencies = [
     "prompt-toolkit>=3.0.50,<4.0.0",
     "mcp>=1.26.0,<2.0.0",
     "json-repair>=0.57.0,<1.0.0",
+]
+
+[project.optional-dependencies]
+matrix = [
     "matrix-nio[e2e]>=0.25.2",
     "mistune>=3.0.0,<4.0.0",
     "nh3>=0.2.17,<1.0.0",
 ]
-
-[project.optional-dependencies]
 dev = [
     "pytest>=9.0.0,<10.0.0",
     "pytest-asyncio>=1.3.0,<2.0.0",