diff --git a/src/praisonaiui/datastore.py b/src/praisonaiui/datastore.py
index 55627cd..b13ce4d 100644
--- a/src/praisonaiui/datastore.py
+++ b/src/praisonaiui/datastore.py
@@ -591,7 +591,7 @@ class SQLAlchemyDataStore(BaseDataStore):
         base = Path(os.environ.get("AIUI_DATA_DIR", str(Path.home() / ".praisonaiui")))
         base.mkdir(parents=True, exist_ok=True)
         db_path = base / "aiui.db"
-        return f"sqlite+aiosqlite:///{db_path}"
+        return f"sqlite+aiosqlite:///{db_path.as_posix()}"
 
     async def _ensure_initialized(self) -> None:
         """Lazy initialization of SQLAlchemy engine and tables."""
diff --git a/src/praisonaiui/features/lifecycle.py b/src/praisonaiui/features/lifecycle.py
index 3618032..3557f07 100644
--- a/src/praisonaiui/features/lifecycle.py
+++ b/src/praisonaiui/features/lifecycle.py
@@ -175,7 +175,7 @@ async def run_startup_hooks() -> None:
         return
 
     _log.info(f"Running {len(_startup_hooks)} startup hooks")
-    start_time = time.time()
+    start_time = time.perf_counter()
 
     for hook in _startup_hooks:
         try:
@@ -187,7 +187,7 @@ async def run_startup_hooks() -> None:
             _log.error(f"Startup hook failed: {getattr(hook, '__name__', str(hook))}: {e}")
             # Continue with other hooks - individual failures shouldn't break startup
 
-    execution_time = time.time() - start_time
+    execution_time = time.perf_counter() - start_time
     _lifecycle_state.update(
         {
             "startup_completed": True,
@@ -209,7 +209,7 @@ async def run_shutdown_hooks() -> None:
 
     _lifecycle_state["shutdown_initiated"] = True
     _log.info(f"Running {len(_shutdown_hooks)} shutdown hooks")
-    start_time = time.time()
+    start_time = time.perf_counter()
 
     # Get shutdown timeout from environment
     timeout = float(os.environ.get("AIUI_SHUTDOWN_TIMEOUT", "30.0"))
@@ -227,7 +227,7 @@ async def run_shutdown_hooks() -> None:
 
     try:
         await asyncio.wait_for(_execute_hooks(), timeout=timeout)
-        execution_time = time.time() - start_time
+        execution_time = time.perf_counter() - start_time
         _lifecycle_state["shutdown_time"] = execution_time
         _log.info(f"Shutdown hooks completed in {execution_time:.3f}s")
     except asyncio.TimeoutError:
diff --git a/tests/unit/test_audio_hooks.py b/tests/unit/test_audio_hooks.py
index b0bb9d3..c259d22 100644
--- a/tests/unit/test_audio_hooks.py
+++ b/tests/unit/test_audio_hooks.py
@@ -305,7 +305,7 @@ class TestAudioSessionManagement:
         session = _audio_sessions[session_id]
         assert session["chunks_received"] == 1
         assert session["bytes_received"] == len(test_data)
-        assert session["last_chunk_at"] > session["started_at"]
+        assert session["last_chunk_at"] >= session["started_at"]
 
         # Check global stats were updated
         assert _audio_stats["total_chunks"] == 1
diff --git a/tests/unit/test_sqlalchemy_datastore.py b/tests/unit/test_sqlalchemy_datastore.py
index 5572fef..c4dc13b 100644
--- a/tests/unit/test_sqlalchemy_datastore.py
+++ b/tests/unit/test_sqlalchemy_datastore.py
@@ -95,7 +95,7 @@ async def test_default_sqlite_url():
 
     with patch.dict(os.environ, {}, clear=True):
         store = SQLAlchemyDataStore()
-        expected = str(Path.home() / ".praisonaiui" / "aiui.db")
+        expected = (Path.home() / ".praisonaiui" / "aiui.db").as_posix()
         assert expected in store._database_url
         assert store._database_url.startswith("sqlite+aiosqlite:///")
 
@@ -108,7 +108,7 @@ async def test_respects_aiui_data_dir_env():
     with tempfile.TemporaryDirectory() as tmpdir:
         with patch.dict(os.environ, {"AIUI_DATA_DIR": tmpdir}):
             store = SQLAlchemyDataStore()
-            expected = str(Path(tmpdir) / "aiui.db")
+            expected = (Path(tmpdir) / "aiui.db").as_posix()
             assert expected in store._database_url
 
 
diff --git a/tests/unit/test_unified_naming.py b/tests/unit/test_unified_naming.py
index 93df3fd..ef95700 100644
--- a/tests/unit/test_unified_naming.py
+++ b/tests/unit/test_unified_naming.py
@@ -151,17 +151,32 @@ class TestCompetitorScrub:
     """The peer framework's name must never reappear in the source tree."""
 
     def test_zero_matches_in_source(self):
-        import subprocess
-        r = subprocess.run(
-            ["grep", "-rn", "-i", "chainlit",
-             "src/praisonaiui", "docs", "examples", "tests",
-             "--include=*.py", "--include=*.md", "--include=*.yaml",
-             "--include=*.yml", "--include=*.ts", "--include=*.tsx"],
-            capture_output=True, text=True, cwd=_repo_root(),
-        )
-        hits = [line for line in r.stdout.splitlines()
-                if ".pyc" not in line
-                and "tests/unit/test_unified_naming" not in line]
+        import pathlib
+
+        root = pathlib.Path(_repo_root())
+        needle = "chainlit"
+        suffixes = {".py", ".md", ".yaml", ".yml", ".ts", ".tsx"}
+        search_dirs = ["src/praisonaiui", "docs", "examples", "tests"]
+
+        hits = []
+        for rel in search_dirs:
+            base = root / rel
+            if not base.exists():
+                continue
+            for path in base.rglob("*"):
+                if not path.is_file() or path.suffix not in suffixes:
+                    continue
+                rel_path = path.relative_to(root).as_posix()
+                if "test_unified_naming" in rel_path:
+                    continue
+                try:
+                    text = path.read_text(encoding="utf-8", errors="ignore")
+                except OSError:
+                    continue
+                for lineno, line in enumerate(text.splitlines(), 1):
+                    if needle in line.lower():
+                        hits.append(f"{rel_path}:{lineno}:{line}")
+
         assert not hits, f"Competitor name reappeared: {hits}"