fix: replace 'mcporter list' with 'mcporter config list' to prevent hangs

mcporter list probes all configured servers sequentially, which can hang
indefinitely when servers are slow/offline. mcporter config list reads
config without probing — sufficient for checking if a server is configured.

Affected: doctor checks (4 channels) and install command (2 calls).

Fixes #34

agent_reach/channels/douyin.py

@@ -29,7 +29,7 @@ class DouyinChannel(Channel):
             )
         try:
             r = subprocess.run(
-                ["mcporter", "list"], capture_output=True, text=True, timeout=10
+                ["mcporter", "config", "list"], capture_output=True, text=True, timeout=5
             )
             if "douyin" not in r.stdout:
                 return "off", (

agent_reach/channels/exa_search.py

@@ -24,7 +24,7 @@ class ExaSearchChannel(Channel):
             )
         try:
             r = subprocess.run(
-                ["mcporter", "list"], capture_output=True, text=True, timeout=10
+                ["mcporter", "config", "list"], capture_output=True, text=True, timeout=5
             )
             if "exa" in r.stdout.lower():
                 return "ok", "全网语义搜索可用（免费，无需 API Key）"

agent_reach/channels/linkedin.py

@@ -26,7 +26,7 @@ class LinkedInChannel(Channel):
             )
         try:
             r = subprocess.run(
-                ["mcporter", "list"], capture_output=True, text=True, timeout=10
+                ["mcporter", "config", "list"], capture_output=True, text=True, timeout=5
             )
             if "linkedin" in r.stdout.lower():
                 return "ok", "完整可用（Profile、公司、职位搜索）"

agent_reach/channels/xiaohongshu.py

@@ -28,7 +28,7 @@ class XiaoHongShuChannel(Channel):
             )
         try:
             r = subprocess.run(
-                ["mcporter", "list"], capture_output=True, text=True, timeout=10
+                ["mcporter", "config", "list"], capture_output=True, text=True, timeout=5
             )
             if "xiaohongshu" not in r.stdout:
                 return "off", (

agent_reach/cli.py

@@ -453,7 +453,7 @@ def _install_mcporter():
     # Configure Exa MCP (free, no key needed)
     try:
         r = subprocess.run(
-            ["mcporter", "list"], capture_output=True, text=True, timeout=10
+            ["mcporter", "config", "list"], capture_output=True, text=True, timeout=5
         )
         if "exa" not in r.stdout:
             subprocess.run(
@@ -469,7 +469,7 @@ def _install_mcporter():
     # Check XiaoHongShu MCP (only if server is running)
     try:
         r = subprocess.run(
-            ["mcporter", "list"], capture_output=True, text=True, timeout=10
+            ["mcporter", "config", "list"], capture_output=True, text=True, timeout=5
         )
         if "xiaohongshu" in r.stdout:
             print("  ✅ XiaoHongShu MCP already configured")