fix(gateway): strip orphaned tool_results + let /reset bypass running agent (#2180)

Two fixes for Telegram/gateway-specific bugs:

1. Anthropic adapter: strip orphaned tool_result blocks (mirror of
   existing tool_use stripping). Context compression or session
   truncation can remove an assistant message containing a tool_use
   while leaving the subsequent tool_result intact. Anthropic rejects
   these with a 400: 'unexpected tool_use_id found in tool_result
   blocks'. The adapter now collects all tool_use IDs and filters out
   any tool_result blocks referencing IDs not in that set.

2. Gateway: /reset and /new now bypass the running-agent guard (like
   /status already does). Previously, sending /reset while an agent
   was running caused the raw text to be queued and later fed back as
   a user message with the same broken history — replaying the
   corrupted session instead of resetting it. Now the running agent is
   interrupted, pending messages are cleared, and the reset command
   dispatches immediately.

Tests updated: existing tests now include proper tool_use→tool_result
pairs; two new tests cover orphaned tool_result stripping.

Co-authored-by: Test <test@test.com>

gateway/run.py

@@ -1344,6 +1344,31 @@ class GatewayRunner:
             if event.get_command() == "status":
                 return await self._handle_status_command(event)
 
+            # /reset and /new must bypass the running-agent guard so they
+            # actually dispatch as commands instead of being queued as user
+            # text (which would be fed back to the agent with the same
+            # broken history — #2170).  Interrupt the agent first, then
+            # clear the adapter's pending queue so the stale "/reset" text
+            # doesn't get re-processed as a user message after the
+            # interrupt completes.
+            from hermes_cli.commands import resolve_command as _resolve_cmd_inner
+            _evt_cmd = event.get_command()
+            _cmd_def_inner = _resolve_cmd_inner(_evt_cmd) if _evt_cmd else None
+            if _cmd_def_inner and _cmd_def_inner.name == "new":
+                running_agent = self._running_agents.get(_quick_key)
+                if running_agent and running_agent is not _AGENT_PENDING_SENTINEL:
+                    running_agent.interrupt("Session reset requested")
+                # Clear any pending messages so the old text doesn't replay
+                adapter = self.adapters.get(source.platform)
+                if adapter and hasattr(adapter, 'get_pending_message'):
+                    adapter.get_pending_message(_quick_key)  # consume and discard
+                self._pending_messages.pop(_quick_key, None)
+                # Clean up the running agent entry so the reset handler
+                # doesn't think an agent is still active.
+                if _quick_key in self._running_agents:
+                    del self._running_agents[_quick_key]
+                return await self._handle_reset_command(event)
+
             if event.message_type == MessageType.PHOTO:
                 logger.debug("PRIORITY photo follow-up for session %s — queueing without interrupt", _quick_key[:20])
                 adapter = self.adapters.get(source.platform)