feat(skills): show live per-source progress while browsing (#43398)

do_browse waited on a frozen 'Fetching skills...' spinner while sources
resolved, so a slow source looked like a hang. parallel_search_sources
already exposes an on_source_done(sid, count) callback fired as each source
completes — wire it into the status line so it ticks off sources live
(official (12), + github (4), + clawhub (500)). The page is still rendered
once, after the full set is merged and trust-sorted, so browse's
official-first ordering and pagination contract are untouched.

tests/hermes_cli/test_skills_hub.py

@@ -653,6 +653,44 @@ def test_browse_skills_dedup_uses_identifier_not_name(monkeypatch):
     )
 
 
+def test_do_browse_reports_live_per_source_progress():
+    """do_browse must pass an on_source_done callback so the status line ticks
+    off each source as it resolves, instead of showing a frozen spinner while
+    a slow source blocks. The page is still rendered once, after the full
+    result set is merged and trust-sorted."""
+    from hermes_cli.skills_hub import do_browse
+    from tools.skills_hub import SkillMeta
+
+    meta = SkillMeta(
+        name="demo", description="d", source="official",
+        identifier="official/demo", trust_level="builtin",
+    )
+
+    captured = {}
+
+    def fake_parallel(sources, query="", per_source_limits=None,
+                      source_filter="all", overall_timeout=30,
+                      on_source_done=None):
+        # Simulate two sources completing — the callback must be wired through.
+        assert on_source_done is not None, "do_browse must pass on_source_done"
+        on_source_done("official", 1)
+        on_source_done("clawhub", 0)
+        captured["called"] = True
+        return [meta], {"official": 1, "clawhub": 0}, []
+
+    sink = StringIO()
+    console = Console(file=sink, force_terminal=False, color_system=None, width=120)
+
+    with patch("tools.skills_hub.create_source_router", return_value=[]), \
+         patch("tools.skills_hub.GitHubAuth"), \
+         patch("tools.skills_hub.parallel_search_sources", side_effect=fake_parallel):
+        do_browse(page=1, page_size=20, console=console)
+
+    assert captured.get("called"), "parallel_search_sources was not invoked"
+    # The rendered page still shows the (single) merged result.
+    assert "demo" in sink.getvalue()
+
+
 # ---------------------------------------------------------------------------
 # Regression: full identifier must be recoverable from `hermes skills search`
 # even when the slug is too long to fit the terminal width (issue #33674).