fix(twitter): migrate from deleted bird CLI to twitter-cli (#231)

steipete/bird repo has been deleted (404). Migrates to twitter-cli
(public-clis/twitter-cli, 2137 stars, Python, actively maintained).

Changes:
- twitter.py: check() now detects `twitter` binary, parses `twitter status` YAML
- cli.py: install via pipx/uv instead of npm, test via `twitter status`
- cli.py: remove bird/xfetch credential sync, use TWITTER_AUTH_TOKEN/CT0 env
- skill references: bird commands → twitter-cli commands
- tests: 5 new tests covering all check() paths

104 tests passing.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/test_twitter_channel.py

@@ -13,58 +13,60 @@ def _cp(stdout="", stderr="", returncode=0):
     return m
 
 
-def test_check_bird_found_and_auth_ok():
-    """bird found + bird check returns 0 → ok."""
+def test_check_twitter_cli_found_and_auth_ok():
+    """twitter-cli found + twitter status ok → ok."""
     channel = TwitterChannel()
-    with patch("shutil.which", side_effect=lambda name: "/usr/local/bin/bird" if name == "bird" else None), patch(
+    with patch("shutil.which", return_value="/usr/local/bin/twitter"), patch(
         "subprocess.run",
-        return_value=_cp(stdout="Authenticated as @user\n", returncode=0),
+        return_value=_cp(stdout="ok: true\nusername: testuser\n", returncode=0),
     ):
         status, message = channel.check()
     assert status == "ok"
     assert "完整可用" in message
 
 
-def test_check_bird_found_auth_missing():
-    """bird found + bird check returns 1 with 'Missing credentials' → warn about auth."""
+def test_check_twitter_cli_found_auth_missing():
+    """twitter-cli found + not_authenticated → warn about auth."""
     channel = TwitterChannel()
-    with patch("shutil.which", side_effect=lambda name: "/usr/local/bin/bird" if name == "bird" else None), patch(
+    with patch("shutil.which", return_value="/usr/local/bin/twitter"), patch(
         "subprocess.run",
-        return_value=_cp(stderr="Missing credentials: AUTH_TOKEN and CT0 required\n", returncode=1),
+        return_value=_cp(
+            stderr="ok: false\nerror:\n  code: not_authenticated\n",
+            returncode=1,
+        ),
     ):
         status, message = channel.check()
     assert status == "warn"
-    assert "未配置认证" in message
+    assert "未认证" in message
 
 
-def test_check_bird_not_found():
-    """bird not found → warn with install hint for @steipete/bird."""
+def test_check_twitter_cli_not_found():
+    """twitter-cli not found → warn with install hint."""
     channel = TwitterChannel()
     with patch("shutil.which", return_value=None):
         status, message = channel.check()
     assert status == "warn"
-    assert "@steipete/bird" in message
+    assert "twitter-cli" in message
 
 
-def test_check_birdx_binary_accepted():
-    """birdx symlink is accepted as an alternative binary name."""
+def test_check_twitter_cli_generic_failure():
+    """twitter status returns 1 without not_authenticated → generic warn."""
     channel = TwitterChannel()
-    with patch("shutil.which", side_effect=lambda name: "/usr/local/bin/birdx" if name == "birdx" else None), patch(
+    with patch("shutil.which", return_value="/usr/local/bin/twitter"), patch(
         "subprocess.run",
-        return_value=_cp(stdout="Authenticated as @user\n", returncode=0),
-    ):
-        status, message = channel.check()
-    assert status == "ok"
-    assert "完整可用" in message
-
-
-def test_check_bird_auth_failure_generic():
-    """bird check returns 1 without 'Missing credentials' → generic auth failure warn."""
-    channel = TwitterChannel()
-    with patch("shutil.which", side_effect=lambda name: "/usr/local/bin/bird" if name == "bird" else None), patch(
-        "subprocess.run",
-        return_value=_cp(stderr="Error: token expired\n", returncode=1),
+        return_value=_cp(stderr="some error\n", returncode=1),
     ):
         status, message = channel.check()
     assert status == "warn"
     assert "认证检查失败" in message
+
+
+def test_check_twitter_cli_exception():
+    """twitter status throws exception → warn."""
+    channel = TwitterChannel()
+    with patch("shutil.which", return_value="/usr/local/bin/twitter"), patch(
+        "subprocess.run", side_effect=Exception("timeout"),
+    ):
+        status, message = channel.check()
+    assert status == "warn"
+    assert "连接失败" in message