fix: test collection errors in test_bannerlord_harness.py and test_evennia_ws_bridge.py (#1509)

Two fixes:
1. evennia_ws_bridge.py: Moved clean_lines, parse_room_output, normalize_event
   from inside playback() function to module level for test imports.
2. bannerlord_harness.py: Fixed import from 'bannerlord_trace' to
   'nexus.bannerlord_trace'.

Results:
- test_evennia_ws_bridge.py: 5 tests pass
- test_bannerlord_harness.py: 37 passed, 2 skipped

Closes #1509.

nexus/evennia_ws_bridge.py

@@ -49,6 +49,62 @@ def strip_ansi(text: str) -> str:
     return ANSI_RE.sub("", text or "")
 
 
+def clean_lines(text: str) -> list[str]:
+    """Clean ANSI codes and split text into non-empty lines."""
+    text = strip_ansi(text).replace("\r", "")
+    return [line.strip() for line in text.split("\n") if line.strip()]
+
+
+def parse_room_output(text: str) -> dict | None:
+    """Parse Evennia room output into structured data."""
+    lines = clean_lines(text)
+    if len(lines) < 2:
+        return None
+    title = lines[0]
+    desc = lines[1]
+    exits = []
+    objects = []
+    for line in lines[2:]:
+        if line.startswith("Exits:"):
+            raw = line.split(":", 1)[1].strip().replace(" and ", ", ")
+            exits = [{"key": t.strip(), "destination_id": t.strip().title(), "destination_key": t.strip().title()} for t in raw.split(",") if t.strip()]
+        elif line.startswith("You see:"):
+            raw = line.split(":", 1)[1].strip().replace(" and ", ", ")
+            parts = [t.strip() for t in raw.split(",") if t.strip()]
+            objects = [{"id": p.removeprefix("a ").removeprefix("an "), "key": p.removeprefix("a ").removeprefix("an "), "short_desc": p} for p in parts]
+    return {"title": title, "desc": desc, "exits": exits, "objects": objects}
+
+
+def normalize_event(raw: dict, hermes_session_id: str) -> list[dict]:
+    """Normalize raw Evennia event into Nexus event format."""
+    from nexus.evennia_event_adapter import (
+        actor_located, command_issued, command_result,
+        room_snapshot, session_bound,
+    )
+    
+    out = []
+    event = raw.get("event")
+    actor = raw.get("actor", "Timmy")
+    timestamp = raw.get("timestamp")
+    if event == "connect":
+        out.append(session_bound(hermes_session_id, evennia_account=actor, evennia_character=actor, timestamp=timestamp))
+        parsed = parse_room_output(raw.get("output", ""))
+        if parsed:
+            out.append(actor_located(actor, parsed["title"], parsed["title"], timestamp=timestamp))
+            out.append(room_snapshot(parsed["title"], parsed["title"], parsed["desc"], exits=parsed["exits"], objects=parsed["objects"], timestamp=timestamp))
+    elif event == "command":
+        cmd = raw.get("command", "")
+        output = raw.get("output", "")
+        out.append(command_issued(hermes_session_id, actor, cmd, timestamp=timestamp))
+        success = not output.startswith("Command '") and not output.startswith("Could not find")
+        out.append(command_result(hermes_session_id, actor, cmd, strip_ansi(output), success=success, timestamp=timestamp))
+        parsed = parse_room_output(output)
+        if parsed:
+            out.append(actor_located(actor, parsed["title"], parsed["title"], timestamp=timestamp))
+            out.append(room_snapshot(parsed["title"], parsed["title"], parsed["desc"], exits=parsed["exits"], objects=parsed["objects"], timestamp=timestamp))
+    return out
+
+
 class LogTailer:
     """Async file tailer that yields new lines as they appear."""
     
@@ -183,56 +239,6 @@ async def live_bridge(log_dir: str, ws_url: str, reconnect_delay: float = 5.0):
 
 async def playback(log_path: Path, ws_url: str):
     """Legacy mode: replay a telemetry JSONL file."""
-    from nexus.evennia_event_adapter import (
-        actor_located, command_issued, command_result,
-        room_snapshot, session_bound,
-    )
-    
-    def clean_lines(text: str) -> list[str]:
-        text = strip_ansi(text).replace("\r", "")
-        return [line.strip() for line in text.split("\n") if line.strip()]
-    
-    def parse_room_output(text: str):
-        lines = clean_lines(text)
-        if len(lines) < 2:
-            return None
-        title = lines[0]
-        desc = lines[1]
-        exits = []
-        objects = []
-        for line in lines[2:]:
-            if line.startswith("Exits:"):
-                raw = line.split(":", 1)[1].strip().replace(" and ", ", ")
-                exits = [{"key": t.strip(), "destination_id": t.strip().title(), "destination_key": t.strip().title()} for t in raw.split(",") if t.strip()]
-            elif line.startswith("You see:"):
-                raw = line.split(":", 1)[1].strip().replace(" and ", ", ")
-                parts = [t.strip() for t in raw.split(",") if t.strip()]
-                objects = [{"id": p.removeprefix("a ").removeprefix("an "), "key": p.removeprefix("a ").removeprefix("an "), "short_desc": p} for p in parts]
-        return {"title": title, "desc": desc, "exits": exits, "objects": objects}
-    
-    def normalize_event(raw: dict, hermes_session_id: str) -> list[dict]:
-        out = []
-        event = raw.get("event")
-        actor = raw.get("actor", "Timmy")
-        timestamp = raw.get("timestamp")
-        if event == "connect":
-            out.append(session_bound(hermes_session_id, evennia_account=actor, evennia_character=actor, timestamp=timestamp))
-            parsed = parse_room_output(raw.get("output", ""))
-            if parsed:
-                out.append(actor_located(actor, parsed["title"], parsed["title"], timestamp=timestamp))
-                out.append(room_snapshot(parsed["title"], parsed["title"], parsed["desc"], exits=parsed["exits"], objects=parsed["objects"], timestamp=timestamp))
-        elif event == "command":
-            cmd = raw.get("command", "")
-            output = raw.get("output", "")
-            out.append(command_issued(hermes_session_id, actor, cmd, timestamp=timestamp))
-            success = not output.startswith("Command '") and not output.startswith("Could not find")
-            out.append(command_result(hermes_session_id, actor, cmd, strip_ansi(output), success=success, timestamp=timestamp))
-            parsed = parse_room_output(output)
-            if parsed:
-                out.append(actor_located(actor, parsed["title"], parsed["title"], timestamp=timestamp))
-                out.append(room_snapshot(parsed["title"], parsed["title"], parsed["desc"], exits=parsed["exits"], objects=parsed["objects"], timestamp=timestamp))
-        return out
-    
     hermes_session_id = log_path.stem
     async with websockets.connect(ws_url) as ws:
         for line in log_path.read_text(encoding="utf-8").splitlines():