fix(reddit): install rdt-cli from GitHub source pinned to 0.4.2 (#326)

PyPI still only has rdt-cli 0.4.1 while the doctor hint required >=0.4.2, so the suggested install command always failed. Installs from the upstream GitHub repo pinned to the 0.4.2 commit instead, and syncs all four docs that still taught the PyPI path. Verified locally: clean-venv install from the pinned source yields rdt 0.4.2 and rdt status works. 86 tests pass. Fixes #294.

agent_reach/channels/reddit.py

@@ -13,6 +13,8 @@ import subprocess
 from .base import Channel
 
 _CREDENTIAL_FILE = "~/.config/rdt-cli/credential.json"
+# Pinned to the 0.4.2 state — PyPI still only has 0.4.1 (upstream issue #10).
+_RDT_GIT_SOURCE = "git+https://github.com/public-clis/rdt-cli.git@5e4fb3720d5c174e976cd425ccc3b879d52cac66"
 
 
 class RedditChannel(Channel):
@@ -31,9 +33,10 @@ class RedditChannel(Channel):
         rdt = shutil.which("rdt")
         if not rdt:
             return "off", (
-                "需要安装 rdt-cli（推荐使用最新版 v0.4.2+）：\n"
-                "  pip install 'rdt-cli>=0.4.2'\n"
-                "或：\n"
+                "需要安装 rdt-cli。PyPI 版本可能暂时落后，推荐直接从 GitHub 安装：\n"
+                f"  pipx install '{_RDT_GIT_SOURCE}'\n"
+                "如已确认 PyPI 版本已更新，也可使用：\n"
+                "  pipx install rdt-cli\n"
                 "  uv tool install rdt-cli\n"
                 "最新源码：https://github.com/public-clis/rdt-cli\n"
                 "安装后运行 `rdt login` 登录（需先在浏览器登录 reddit.com）"