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/cli.py

@@ -17,6 +17,9 @@ import time
 
 from agent_reach import __version__
 
+# 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"
+
 
 def _ensure_utf8_console():
     """Best-effort Windows console UTF-8 setup for CLI runtime only."""
@@ -706,8 +709,10 @@ def _install_reddit_deps():
     if shutil.which("rdt"):
         print("  ✅ rdt-cli already installed")
         return
-    for tool, cmd in [("pipx", ["pipx", "install", "rdt-cli"]),
-                      ("uv", ["uv", "tool", "install", "rdt-cli"])]:
+    for tool, cmd in [
+        ("pipx", ["pipx", "install", _RDT_GIT_SOURCE]),
+        ("uv", ["uv", "tool", "install", "--from", _RDT_GIT_SOURCE, "rdt-cli"]),
+    ]:
         if shutil.which(tool):
             try:
                 subprocess.run(cmd, capture_output=True, encoding="utf-8",
@@ -717,7 +722,7 @@ def _install_reddit_deps():
                     return
             except Exception:
                 pass
-    print("  [!]  rdt-cli install failed. Run: pipx install rdt-cli")
+    print(f"  [!]  rdt-cli install failed. Run: pipx install '{_RDT_GIT_SOURCE}'")
 
 
 def _install_bili_deps():
@@ -1495,7 +1500,8 @@ def _cmd_setup():
 
     # Step 3: Reddit — rdt-cli
     print("【信息】Reddit — 通过 rdt-cli 搜索和阅读，无需配置")
-    print("  安装：pipx install rdt-cli")
+    print(f"  安装：pipx install '{_RDT_GIT_SOURCE}'")
+    print("  然后运行：rdt login")
     print()
 
     # Step 4: Groq (Whisper)