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

Resolves #1509. Two test files were failing to collect during pytest.

nexus/evennia_ws_bridge.py:
- Extracted clean_lines(), parse_room_output(), normalize_event()
  from playback() closure to module-level functions
- Tests import these as module-level symbols; they were buried
  inside the playback() function and inaccessible

nexus/bannerlord_harness.py:
- Fixed import: 'from bannerlord_trace' to 'from nexus.bannerlord_trace'

Results:
- pytest test_evennia_ws_bridge.py: 5 passed
- pytest test_bannerlord_harness.py: 37 passed, 2 skipped
- 44 tests now running that were previously broken

nexus/bannerlord_harness.py

@@ -29,7 +29,7 @@ from typing import Any, Callable, Optional
 
 import websockets
 
-from bannerlord_trace import BannerlordTraceLogger
+from nexus.bannerlord_trace import BannerlordTraceLogger
 
 # ═══════════════════════════════════════════════════════════════════════════
 # CONFIGURATION

nexus/evennia_ws_bridge.py

@@ -181,6 +181,63 @@ async def live_bridge(log_dir: str, ws_url: str, reconnect_delay: float = 5.0):
     await asyncio.gather(*tasks)
 
 
+
+
+def clean_lines(text: str) -> list[str]:
+    """Strip ANSI, normalize line endings, return 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:
+    """Parse Evennia room text into structured data (title, desc, exits, objects)."""
+    lines = clean_lines(text)
+    if len(lines) < 2:
+        return {"title": lines[0] if lines else "", "desc": "", "exits": [], "objects": []}
+    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]:
+    """Convert raw Evennia event dict into normalized Nexus events."""
+    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
+
+
 async def playback(log_path: Path, ws_url: str):
     """Legacy mode: replay a telemetry JSONL file."""
     from nexus.evennia_event_adapter import (