feat(whatsapp): consolidate tool progress into single editable message

Instead of sending a separate WhatsApp message for each tool call during
agent execution (N+1 messages), the first tool sends a new message and
subsequent tools edit it to append their line. Result: 1 growing progress
message + 1 final response = 2 messages instead of N+1.

Changes:
- bridge.js: Add POST /edit endpoint using Baileys message editing
- base.py: Add optional edit_message() to BasePlatformAdapter (no-op
  default, so platforms without editing support work unchanged)
- whatsapp.py: Implement edit_message() calling bridge /edit
- run.py: Rewrite send_progress_messages() to accumulate tool lines and
  edit the progress message. Falls back to sending a new message if
  edit fails (graceful degradation).

Before (5 tools = 6 messages):
  ⚕ Hermes Agent ─── 🔍 web_search... "query"
  ⚕ Hermes Agent ─── 📄 web_extract... "url"
  ⚕ Hermes Agent ─── 💻 terminal... "pip install"
  ⚕ Hermes Agent ─── ✍️ write_file... "app.py"
  ⚕ Hermes Agent ─── 💻 terminal... "python app.py"
  ⚕ Hermes Agent ─── Done! The server is running...

After (5 tools = 2 messages):
  ⚕ Hermes Agent ───
  🔍 web_search... "query"
  📄 web_extract... "url"
  💻 terminal... "pip install"
  ✍️ write_file... "app.py"
  💻 terminal... "python app.py"

  ⚕ Hermes Agent ─── Done! The server is running...

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

gateway/platforms/whatsapp.py

@@ -351,7 +351,36 @@ class WhatsAppAdapter(BasePlatformAdapter):
             )
         except Exception as e:
             return SendResult(success=False, error=str(e))
-    
+
+    async def edit_message(
+        self,
+        chat_id: str,
+        message_id: str,
+        content: str,
+    ) -> SendResult:
+        """Edit a previously sent message via the WhatsApp bridge."""
+        if not self._running:
+            return SendResult(success=False, error="Not connected")
+        try:
+            import aiohttp
+            async with aiohttp.ClientSession() as session:
+                async with session.post(
+                    f"http://localhost:{self._bridge_port}/edit",
+                    json={
+                        "chatId": chat_id,
+                        "messageId": message_id,
+                        "message": content,
+                    },
+                    timeout=aiohttp.ClientTimeout(total=15)
+                ) as resp:
+                    if resp.status == 200:
+                        return SendResult(success=True, message_id=message_id)
+                    else:
+                        error = await resp.text()
+                        return SendResult(success=False, error=error)
+        except Exception as e:
+            return SendResult(success=False, error=str(e))
+
     async def send_typing(self, chat_id: str) -> None:
         """Send typing indicator via bridge."""
         if not self._running: