fix(miner,convo_miner): close remaining wing-name normalization gaps (#1194)

Two follow-ups against the review on this PR:

1. ``miner.load_config`` no-yaml fallback was returning the raw dirname
   as the wing, while ``cmd_init`` writes ``topics_by_wing`` under the
   normalized slug. A hyphenated project mined without a ``mempalace.yaml``
   file silently lost every topic tunnel — same key-miss class as #1194,
   just down the no-yaml branch (raised by Qodo on this PR).

2. ``convo_miner`` was applying the lower/replace rule inline at one
   call site. Now folded through ``normalize_wing_name`` so all wing-slug
   producers — ``cmd_init``, ``room_detector_local``, ``miner.load_config``
   fallback, ``convo_miner`` — share a single source of truth. No
   behavior change for any input; pure consolidation.

Added ``test_load_config_no_yaml_normalizes_hyphenated_wing`` to lock
the fallback path to the normalized slug — fails on develop without
the miner change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_miner.py

@@ -67,6 +67,24 @@ def test_load_config_uses_defaults_when_yaml_missing():
         shutil.rmtree(tmpdir)
 
 
+def test_load_config_no_yaml_normalizes_hyphenated_wing():
+    """Fallback wing name is normalized so it matches topics_by_wing keys.
+
+    Regression for the no-yaml branch of #1194: ``cmd_init`` writes
+    ``topics_by_wing`` under the normalized slug, so the miner's
+    fallback wing must use the same normalization or the tunnel lookup
+    misses every key for hyphenated dirnames.
+    """
+    parent = tempfile.mkdtemp()
+    try:
+        project_root = Path(parent) / "my-cool-app"
+        project_root.mkdir()
+        config = load_config(str(project_root))
+        assert config["wing"] == "my_cool_app"
+    finally:
+        shutil.rmtree(parent)
+
+
 def test_scan_project_skips_mempalace_generated_files():
     with tempfile.TemporaryDirectory() as tmpdir:
         project_root = Path(tmpdir).resolve()