fix(lint): declare updateDisplayPreview in ESLint global comment

Codacy flagged 'updateDisplayPreview is not defined' at app.js:73.
The function is defined in base.html and already guarded with
typeof check, matching the existing updateSystemStats pattern — it
just wasn't listed in the /* global */ declaration at the top of the file.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

test/test_api_extractors.py

@@ -0,0 +1,342 @@
+"""
+Tests for src/base_classes/api_extractors.py
+
+Covers ESPNFootballExtractor, ESPNBaseballExtractor, ESPNHockeyExtractor,
+SoccerAPIExtractor, and the shared _extract_common_details logic.
+"""
+
+import logging
+import pytest
+from src.base_classes.api_extractors import (
+    ESPNFootballExtractor,
+    ESPNBaseballExtractor,
+    ESPNHockeyExtractor,
+    SoccerAPIExtractor,
+)
+
+
+# ---------------------------------------------------------------------------
+# Shared test data factories
+# ---------------------------------------------------------------------------
+
+def _make_espn_event(state: str = "in", home_abbr: str = "KC", away_abbr: str = "BUF",
+                     home_score: str = "14", away_score: str = "7",
+                     date_str: str = "2024-01-15T20:00:00Z",
+                     include_situation: bool = False,
+                     situation: dict | None = None,
+                     status_detail: str = "2nd Qtr 8:42",
+                     period: int = 2) -> dict:
+    """Build a minimal ESPN-style game event dict."""
+    comp_status = {
+        "type": {
+            "state": state,
+            "shortDetail": status_detail,
+            "detail": status_detail,
+            "name": "STATUS_IN_PROGRESS",
+        },
+        "period": period,
+        "displayClock": "8:42",
+    }
+    comp = {
+        "status": comp_status,
+        "competitors": [
+            {
+                "homeAway": "home",
+                "team": {"abbreviation": home_abbr, "displayName": f"{home_abbr} Team"},
+                "score": home_score,
+            },
+            {
+                "homeAway": "away",
+                "team": {"abbreviation": away_abbr, "displayName": f"{away_abbr} Team"},
+                "score": away_score,
+            },
+        ],
+    }
+    if include_situation:
+        comp["situation"] = situation or {}
+    return {
+        "id": "test-game-1",
+        "date": date_str,
+        "competitions": [comp],
+    }
+
+
+def _make_logger() -> logging.Logger:
+    return logging.getLogger("test_extractor")
+
+
+# ---------------------------------------------------------------------------
+# ESPNFootballExtractor
+# ---------------------------------------------------------------------------
+
+class TestESPNFootballExtractor:
+    def setup_method(self):
+        self.extractor = ESPNFootballExtractor(_make_logger())
+
+    def test_extract_live_game_basic_fields(self):
+        event = _make_espn_event(state="in", home_score="14", away_score="7")
+        result = self.extractor.extract_game_details(event)
+        assert result is not None
+        assert result["home_abbr"] == "KC"
+        assert result["away_abbr"] == "BUF"
+        assert result["home_score"] == "14"
+        assert result["away_score"] == "7"
+        assert result["is_live"] is True
+        assert result["is_final"] is False
+        assert result["is_upcoming"] is False
+
+    def test_extract_final_game(self):
+        event = _make_espn_event(state="post")
+        result = self.extractor.extract_game_details(event)
+        assert result is not None
+        assert result["is_final"] is True
+        assert result["is_live"] is False
+
+    def test_extract_upcoming_game(self):
+        event = _make_espn_event(state="pre")
+        result = self.extractor.extract_game_details(event)
+        assert result is not None
+        assert result["is_upcoming"] is True
+
+    def test_sport_specific_fields_default_when_pregame(self):
+        event = _make_espn_event(state="pre")
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert "down" in fields
+        assert "distance" in fields
+        assert "possession" in fields
+        assert "is_redzone" in fields
+        assert fields["is_redzone"] is False
+
+    def test_sport_specific_fields_live_with_situation(self):
+        situation = {
+            "down": 3,
+            "distance": 7,
+            "possession": "KC",
+            "isRedZone": True,
+            "homeTimeouts": 2,
+            "awayTimeouts": 1,
+        }
+        event = _make_espn_event(state="in", include_situation=True, situation=situation)
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["down"] == 3
+        assert fields["distance"] == 7
+        assert fields["is_redzone"] is True
+        assert fields["home_timeouts"] == 2
+        assert fields["away_timeouts"] == 1
+
+    def test_scoring_event_detected(self):
+        # situation must be non-empty (truthy) for the live block to execute
+        situation = {"down": 1, "distance": 10}
+        event = _make_espn_event(
+            state="in",
+            include_situation=True,
+            situation=situation,
+            status_detail="touchdown scored",
+        )
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert "touchdown" in fields.get("scoring_event", "").lower()
+
+    def test_returns_none_on_empty_event(self):
+        assert self.extractor.extract_game_details({}) is None
+
+    def test_returns_none_when_teams_missing(self):
+        event = {
+            "id": "x",
+            "date": "2024-01-15T20:00:00Z",
+            "competitions": [
+                {
+                    "status": {"type": {"state": "in", "shortDetail": "", "detail": "", "name": ""}},
+                    "competitors": [],  # no competitors
+                }
+            ],
+        }
+        assert self.extractor.extract_game_details(event) is None
+
+    def test_date_z_suffix_parsed(self):
+        event = _make_espn_event(date_str="2024-01-15T20:00:00Z")
+        result = self.extractor.extract_game_details(event)
+        # Should not raise and should return a result
+        assert result is not None
+
+    def test_id_propagated(self):
+        event = _make_espn_event()
+        result = self.extractor.extract_game_details(event)
+        assert result["id"] == "test-game-1"
+
+
+# ---------------------------------------------------------------------------
+# ESPNBaseballExtractor
+# ---------------------------------------------------------------------------
+
+class TestESPNBaseballExtractor:
+    def setup_method(self):
+        self.extractor = ESPNBaseballExtractor(_make_logger())
+
+    def test_extract_live_game(self):
+        event = _make_espn_event(
+            state="in", home_abbr="NYY", away_abbr="BOS",
+            home_score="3", away_score="2"
+        )
+        result = self.extractor.extract_game_details(event)
+        assert result is not None
+        assert result["home_abbr"] == "NYY"
+        assert result["is_live"] is True
+
+    def test_baseball_sport_fields_defaults(self):
+        event = _make_espn_event(state="pre")
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert "inning" in fields
+        assert "outs" in fields
+        assert "bases" in fields
+        assert "strikes" in fields
+        assert "balls" in fields
+
+    def test_baseball_sport_fields_live(self):
+        situation = {
+            "inning": 7,
+            "outs": 2,
+            "bases": "110",
+            "strikes": 2,
+            "balls": 3,
+            "pitcher": "Smith",
+            "batter": "Jones",
+        }
+        event = _make_espn_event(state="in", include_situation=True, situation=situation)
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["inning"] == 7
+        assert fields["outs"] == 2
+        assert fields["strikes"] == 2
+        assert fields["pitcher"] == "Smith"
+
+    def test_returns_none_on_empty(self):
+        assert self.extractor.extract_game_details({}) is None
+
+
+# ---------------------------------------------------------------------------
+# ESPNHockeyExtractor
+# ---------------------------------------------------------------------------
+
+class TestESPNHockeyExtractor:
+    def setup_method(self):
+        self.extractor = ESPNHockeyExtractor(_make_logger())
+
+    def test_extract_live_game(self):
+        event = _make_espn_event(
+            state="in", home_abbr="BOS", away_abbr="TOR",
+            home_score="2", away_score="1"
+        )
+        result = self.extractor.extract_game_details(event)
+        assert result is not None
+        assert result["is_live"] is True
+
+    def test_hockey_period_text_p1(self):
+        situation = {"isPowerPlay": False}
+        event = _make_espn_event(
+            state="in", include_situation=True, situation=situation, period=1
+        )
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["period_text"] == "P1"
+
+    def test_hockey_period_text_p2(self):
+        situation = {"isPowerPlay": False}  # non-empty so the live block executes
+        event = _make_espn_event(
+            state="in", include_situation=True, situation=situation, period=2
+        )
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["period_text"] == "P2"
+
+    def test_hockey_period_text_p3(self):
+        situation = {"isPowerPlay": False}
+        event = _make_espn_event(
+            state="in", include_situation=True, situation=situation, period=3
+        )
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["period_text"] == "P3"
+
+    def test_hockey_period_text_ot(self):
+        situation = {"isPowerPlay": False}
+        event = _make_espn_event(
+            state="in", include_situation=True, situation=situation, period=4
+        )
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["period_text"] == "OT1"
+
+    def test_hockey_power_play(self):
+        situation = {"isPowerPlay": True, "homeShots": 12, "awayShots": 8}
+        event = _make_espn_event(state="in", include_situation=True, situation=situation, period=2)
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["power_play"] is True
+        assert fields["shots_on_goal"]["home"] == 12
+        assert fields["shots_on_goal"]["away"] == 8
+
+    def test_hockey_fields_defaults_pregame(self):
+        event = _make_espn_event(state="pre")
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert "period" in fields
+        assert "power_play" in fields
+        assert fields["power_play"] is False
+
+    def test_returns_none_on_empty(self):
+        assert self.extractor.extract_game_details({}) is None
+
+
+# ---------------------------------------------------------------------------
+# SoccerAPIExtractor
+# ---------------------------------------------------------------------------
+
+class TestSoccerAPIExtractor:
+    def setup_method(self):
+        self.extractor = SoccerAPIExtractor(_make_logger())
+
+    def _make_soccer_event(self, is_live: bool = True) -> dict:
+        return {
+            "id": "soccer-1",
+            "home_team": {"abbreviation": "ARS", "name": "Arsenal"},
+            "away_team": {"abbreviation": "CHE", "name": "Chelsea"},
+            "home_score": "2",
+            "away_score": "1",
+            "status": "LIVE",
+            "is_live": is_live,
+            "is_final": not is_live,
+            "is_upcoming": False,
+            "half": "1",
+            "stoppage_time": "2",
+            "home_yellow_cards": 1,
+            "away_yellow_cards": 2,
+            "home_red_cards": 0,
+            "away_red_cards": 0,
+            "home_possession": 55,
+            "away_possession": 45,
+        }
+
+    def test_extract_live_game(self):
+        event = self._make_soccer_event(is_live=True)
+        result = self.extractor.extract_game_details(event)
+        assert result is not None
+        assert result["home_abbr"] == "ARS"
+        assert result["away_abbr"] == "CHE"
+        assert result["is_live"] is True
+
+    def test_sport_specific_cards(self):
+        event = self._make_soccer_event()
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["cards"]["home_yellow"] == 1
+        assert fields["cards"]["away_yellow"] == 2
+        assert fields["cards"]["home_red"] == 0
+
+    def test_sport_specific_possession(self):
+        event = self._make_soccer_event()
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["possession"]["home"] == 55
+        assert fields["possession"]["away"] == 45
+
+    def test_sport_specific_half(self):
+        event = self._make_soccer_event()
+        fields = self.extractor.get_sport_specific_fields(event)
+        assert fields["half"] == "1"
+
+    def test_scores_as_strings(self):
+        event = self._make_soccer_event()
+        result = self.extractor.extract_game_details(event)
+        assert result["home_score"] == "2"
+        assert result["away_score"] == "1"

test/test_background_data_service.py

@@ -0,0 +1,299 @@
+"""
+Tests for src/background_data_service.py
+
+Covers BackgroundDataService: submit_fetch_request, get_result,
+is_request_complete, get_request_status, cancel_request, get_statistics,
+_cleanup_completed_requests, shutdown, and get_background_service singleton.
+"""
+
+import time
+import pytest
+from unittest.mock import MagicMock, patch, Mock
+from concurrent.futures import Future
+
+from src.background_data_service import (
+    BackgroundDataService,
+    FetchStatus,
+    FetchResult,
+    FetchRequest,
+    get_background_service,
+    shutdown_background_service,
+)
+import src.background_data_service as bds_module
+
+
+# ---------------------------------------------------------------------------
+# Fixtures
+# ---------------------------------------------------------------------------
+
+@pytest.fixture(autouse=True)
+def reset_global_service():
+    """Ensure each test starts with no global singleton."""
+    shutdown_background_service()
+    yield
+    shutdown_background_service()
+
+
+@pytest.fixture
+def mock_cache_manager():
+    m = MagicMock()
+    m.get.return_value = None
+    m.set.return_value = None
+    m.generate_sport_cache_key.return_value = "test_key"
+    return m
+
+
+@pytest.fixture
+def service(mock_cache_manager):
+    svc = BackgroundDataService(mock_cache_manager, max_workers=2, request_timeout=5)
+    yield svc
+    svc.shutdown(wait=False)
+
+
+# ---------------------------------------------------------------------------
+# Initialisation
+# ---------------------------------------------------------------------------
+
+class TestInitialisation:
+    def test_stats_zeroed(self, service):
+        stats = service.get_statistics()
+        assert stats["total_requests"] == 0
+        assert stats["completed_requests"] == 0
+        assert stats["failed_requests"] == 0
+
+    def test_no_active_requests(self, service):
+        assert len(service.active_requests) == 0
+
+    def test_not_shutdown(self, service):
+        assert service._shutdown is False
+
+
+# ---------------------------------------------------------------------------
+# Cache hit path
+# ---------------------------------------------------------------------------
+
+class TestCacheHit:
+    def test_cache_hit_returns_request_id(self, service, mock_cache_manager):
+        mock_cache_manager.get.return_value = {"events": [{"id": "1"}]}
+        req_id = service.submit_fetch_request(
+            sport="nfl", year=2024,
+            url="https://example.com/nfl",
+            cache_key="nfl_key",
+        )
+        assert req_id is not None
+        # Request should be immediately complete due to cache hit
+        result = service.get_result(req_id)
+        assert result is not None
+        assert result.success is True
+        assert result.cached is True
+
+    def test_cache_hit_increments_stat(self, service, mock_cache_manager):
+        mock_cache_manager.get.return_value = {"events": []}
+        service.submit_fetch_request(sport="nba", year=2024, url="https://x.com", cache_key="k")
+        stats = service.get_statistics()
+        assert stats["cached_hits"] == 1
+
+
+# ---------------------------------------------------------------------------
+# Actual fetch path (mocked HTTP)
+# ---------------------------------------------------------------------------
+
+class TestFetchPath:
+    def _valid_payload(self) -> dict:
+        return {"events": [{"id": "g1"}, {"id": "g2"}]}
+
+    def test_successful_fetch_completes(self, service, mock_cache_manager):
+        mock_resp = Mock()
+        mock_resp.json.return_value = self._valid_payload()
+        mock_resp.raise_for_status.return_value = None
+
+        with patch.object(service.session, "get", return_value=mock_resp):
+            req_id = service.submit_fetch_request(
+                sport="nfl", year=2024,
+                url="https://example.com/nfl",
+                cache_key="nfl_test",
+            )
+            # Wait for the background thread
+            deadline = time.time() + 5
+            while not service.is_request_complete(req_id) and time.time() < deadline:
+                time.sleep(0.05)
+
+        result = service.get_result(req_id)
+        assert result is not None
+        assert result.success is True
+        assert result.data == self._valid_payload()
+
+    def test_failed_fetch_records_error(self, service, mock_cache_manager):
+        with patch.object(service.session, "get", side_effect=Exception("network error")):
+            req_id = service.submit_fetch_request(
+                sport="nba", year=2024,
+                url="https://example.com/nba",
+                cache_key="nba_test",
+                max_retries=0,
+            )
+            deadline = time.time() + 5
+            while not service.is_request_complete(req_id) and time.time() < deadline:
+                time.sleep(0.05)
+
+        result = service.get_result(req_id)
+        assert result is not None
+        assert result.success is False
+        assert result.error is not None
+
+    def test_cache_miss_increments_stat(self, service, mock_cache_manager):
+        mock_resp = Mock()
+        mock_resp.json.return_value = self._valid_payload()
+        mock_resp.raise_for_status.return_value = None
+
+        with patch.object(service.session, "get", return_value=mock_resp):
+            service.submit_fetch_request(
+                sport="nfl", year=2024, url="https://x.com", cache_key="new_key",
+            )
+        stats = service.get_statistics()
+        assert stats["cache_misses"] == 1
+
+    def test_callback_called_on_success(self, service, mock_cache_manager):
+        callback = Mock()
+        mock_resp = Mock()
+        mock_resp.json.return_value = self._valid_payload()
+        mock_resp.raise_for_status.return_value = None
+
+        with patch.object(service.session, "get", return_value=mock_resp):
+            req_id = service.submit_fetch_request(
+                sport="nfl", year=2024, url="https://x.com",
+                cache_key="cb_key", callback=callback, max_retries=0,
+            )
+            deadline = time.time() + 5
+            while not service.is_request_complete(req_id) and time.time() < deadline:
+                time.sleep(0.05)
+
+        callback.assert_called_once()
+        call_arg = callback.call_args[0][0]
+        assert isinstance(call_arg, FetchResult)
+
+    def test_data_cached_after_successful_fetch(self, service, mock_cache_manager):
+        mock_resp = Mock()
+        mock_resp.json.return_value = self._valid_payload()
+        mock_resp.raise_for_status.return_value = None
+
+        with patch.object(service.session, "get", return_value=mock_resp):
+            req_id = service.submit_fetch_request(
+                sport="nfl", year=2024, url="https://x.com", cache_key="cache_after_key",
+            )
+            deadline = time.time() + 5
+            while not service.is_request_complete(req_id) and time.time() < deadline:
+                time.sleep(0.05)
+
+        mock_cache_manager.set.assert_called()
+
+
+# ---------------------------------------------------------------------------
+# Request status / cancel
+# ---------------------------------------------------------------------------
+
+class TestRequestStatusAndCancel:
+    def test_unknown_request_status_is_none(self, service):
+        assert service.get_request_status("nonexistent") is None
+
+    def test_cancel_active_request(self, service, mock_cache_manager):
+        # Manually insert an active request
+        req = FetchRequest(
+            id="r1", sport="nfl", year=2024,
+            cache_key="k", url="https://x.com",
+        )
+        req.status = FetchStatus.PENDING
+        service.active_requests["r1"] = req
+        result = service.cancel_request("r1")
+        assert result is True
+        assert "r1" not in service.active_requests
+
+    def test_cancel_nonexistent_request(self, service):
+        assert service.cancel_request("does-not-exist") is False
+
+    def test_is_request_complete_false_for_active(self, service, mock_cache_manager):
+        req = FetchRequest(
+            id="r2", sport="mlb", year=2024,
+            cache_key="k2", url="https://x.com",
+        )
+        service.active_requests["r2"] = req
+        assert service.is_request_complete("r2") is False
+
+    def test_is_request_complete_true_for_done(self, service):
+        result = FetchResult(request_id="r3", success=True)
+        service.completed_requests["r3"] = result
+        assert service.is_request_complete("r3") is True
+
+    def test_get_result_returns_none_for_unknown(self, service):
+        assert service.get_result("unknown") is None
+
+
+# ---------------------------------------------------------------------------
+# Shutdown
+# ---------------------------------------------------------------------------
+
+class TestShutdown:
+    def test_shutdown_sets_flag(self, service):
+        service.shutdown(wait=False)
+        assert service._shutdown is True
+
+    def test_submit_after_shutdown_raises(self, service, mock_cache_manager):
+        service.shutdown(wait=False)
+        with pytest.raises(RuntimeError, match="shutting down"):
+            service.submit_fetch_request(
+                sport="nfl", year=2024, url="https://x.com", cache_key="k"
+            )
+
+
+# ---------------------------------------------------------------------------
+# Cleanup
+# ---------------------------------------------------------------------------
+
+class TestCleanup:
+    def test_cleanup_removes_old_requests(self, service):
+        old_result = FetchResult(request_id="old", success=True)
+        old_result.completed_at = time.time() - 7200  # 2 hours ago
+        service.completed_requests["old"] = old_result
+        service._last_completed_requests_cleanup = 0  # force cleanup
+        removed = service._cleanup_completed_requests(force=True)
+        assert removed >= 1
+        assert "old" not in service.completed_requests
+
+    def test_cleanup_respects_interval(self, service):
+        old_result = FetchResult(request_id="r", success=True)
+        old_result.completed_at = time.time() - 7200
+        service.completed_requests["r"] = old_result
+        # Cleanup interval not passed, should skip
+        service._last_completed_requests_cleanup = time.time()
+        removed = service._cleanup_completed_requests(force=False)
+        assert removed == 0
+
+    def test_size_limit_enforcement(self, service):
+        service._max_completed_requests = 3
+        for i in range(5):
+            result = FetchResult(request_id=str(i), success=True)
+            result.completed_at = time.time() - (5 - i) * 100  # oldest first
+            service.completed_requests[str(i)] = result
+        service._last_completed_requests_cleanup = 0
+        service._cleanup_completed_requests(force=True)
+        assert len(service.completed_requests) <= 3
+
+
+# ---------------------------------------------------------------------------
+# Singleton get_background_service
+# ---------------------------------------------------------------------------
+
+class TestGetBackgroundService:
+    def test_first_call_requires_cache_manager(self):
+        with pytest.raises(ValueError, match="cache_manager is required"):
+            get_background_service()
+
+    def test_creates_singleton(self, mock_cache_manager):
+        svc1 = get_background_service(mock_cache_manager)
+        svc2 = get_background_service()
+        assert svc1 is svc2
+
+    def test_shutdown_clears_singleton(self, mock_cache_manager):
+        get_background_service(mock_cache_manager)
+        shutdown_background_service()
+        with pytest.raises(ValueError):
+            get_background_service()

test/test_data_sources.py

@@ -0,0 +1,209 @@
+"""
+Tests for src/base_classes/data_sources.py
+
+Covers ESPNDataSource, MLBAPIDataSource, SoccerAPIDataSource.
+All HTTP calls are mocked to avoid network access.
+"""
+
+import logging
+from datetime import datetime, date
+from unittest.mock import MagicMock, patch, Mock
+import pytest
+import requests
+
+from src.base_classes.data_sources import ESPNDataSource, MLBAPIDataSource, SoccerAPIDataSource
+
+
+def _make_logger() -> logging.Logger:
+    return logging.getLogger("test_data_sources")
+
+
+def _mock_response(json_data: dict, status_code: int = 200):
+    resp = Mock(spec=requests.Response)
+    resp.status_code = status_code
+    resp.json.return_value = json_data
+    resp.raise_for_status = Mock()
+    if status_code >= 400:
+        resp.raise_for_status.side_effect = requests.HTTPError(response=resp)
+    return resp
+
+
+# ---------------------------------------------------------------------------
+# ESPNDataSource
+# ---------------------------------------------------------------------------
+
+class TestESPNDataSource:
+    def setup_method(self):
+        self.source = ESPNDataSource(_make_logger())
+
+    def test_get_headers(self):
+        headers = self.source.get_headers()
+        assert headers["Accept"] == "application/json"
+        assert "LEDMatrix" in headers["User-Agent"]
+
+    def test_fetch_live_games_returns_live_events(self):
+        live_event = {
+            "competitions": [{"status": {"type": {"state": "in"}}}]
+        }
+        non_live_event = {
+            "competitions": [{"status": {"type": {"state": "pre"}}}]
+        }
+        payload = {"events": [live_event, non_live_event]}
+
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_live_games("football", "nfl")
+
+        assert len(result) == 1
+        assert result[0] is live_event
+
+    def test_fetch_live_games_empty_when_none_live(self):
+        payload = {"events": [
+            {"competitions": [{"status": {"type": {"state": "post"}}}]}
+        ]}
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_live_games("football", "nfl")
+        assert result == []
+
+    def test_fetch_live_games_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("network failure")):
+            result = self.source.fetch_live_games("football", "nfl")
+        assert result == []
+
+    def test_fetch_schedule_returns_all_events(self):
+        events = [{"id": "1"}, {"id": "2"}]
+        payload = {"events": events}
+        start = datetime(2024, 1, 1)
+        end = datetime(2024, 1, 7)
+
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_schedule("football", "nfl", (start, end))
+
+        assert len(result) == 2
+
+    def test_fetch_schedule_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("timeout")):
+            result = self.source.fetch_schedule("football", "nfl", (datetime.now(), datetime.now()))
+        assert result == []
+
+    def test_fetch_standings_success(self):
+        payload = {"standings": []}
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_standings("football", "nfl")
+        assert result == payload
+
+    def test_fetch_standings_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("error")):
+            result = self.source.fetch_standings("football", "nfl")
+        assert result == {}
+
+    def test_base_url_set_correctly(self):
+        assert "espn.com" in self.source.base_url
+
+
+# ---------------------------------------------------------------------------
+# MLBAPIDataSource
+# ---------------------------------------------------------------------------
+
+class TestMLBAPIDataSource:
+    def setup_method(self):
+        self.source = MLBAPIDataSource(_make_logger())
+
+    def test_fetch_live_games_filters_live(self):
+        live_game = {"status": {"abstractGameState": "Live"}}
+        final_game = {"status": {"abstractGameState": "Final"}}
+        payload = {"dates": [{"games": [live_game, final_game]}]}
+
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_live_games("baseball", "mlb")
+
+        assert len(result) == 1
+        assert result[0] is live_game
+
+    def test_fetch_live_games_empty_dates(self):
+        payload = {"dates": []}
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_live_games("baseball", "mlb")
+        assert result == []
+
+    def test_fetch_live_games_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("err")):
+            result = self.source.fetch_live_games("baseball", "mlb")
+        assert result == []
+
+    def test_fetch_schedule_aggregates_all_dates(self):
+        payload = {
+            "dates": [
+                {"games": [{"id": "1"}, {"id": "2"}]},
+                {"games": [{"id": "3"}]},
+            ]
+        }
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_schedule("baseball", "mlb", (datetime.now(), datetime.now()))
+        assert len(result) == 3
+
+    def test_fetch_schedule_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("err")):
+            result = self.source.fetch_schedule("baseball", "mlb", (datetime.now(), datetime.now()))
+        assert result == []
+
+    def test_fetch_standings_success(self):
+        payload = {"records": []}
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_standings("baseball", "mlb")
+        assert result == payload
+
+    def test_fetch_standings_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("err")):
+            result = self.source.fetch_standings("baseball", "mlb")
+        assert result == {}
+
+
+# ---------------------------------------------------------------------------
+# SoccerAPIDataSource
+# ---------------------------------------------------------------------------
+
+class TestSoccerAPIDataSource:
+    def setup_method(self):
+        self.source = SoccerAPIDataSource(_make_logger(), api_key="test-key-123")
+
+    def test_headers_include_api_key(self):
+        headers = self.source.get_headers()
+        assert headers["X-Auth-Token"] == "test-key-123"
+
+    def test_headers_without_api_key(self):
+        source = SoccerAPIDataSource(_make_logger())
+        headers = source.get_headers()
+        assert "X-Auth-Token" not in headers
+
+    def test_fetch_live_games_success(self):
+        payload = {"matches": [{"id": "m1"}, {"id": "m2"}]}
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_live_games("soccer", "eng.1")
+        assert len(result) == 2
+
+    def test_fetch_live_games_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("err")):
+            result = self.source.fetch_live_games("soccer", "eng.1")
+        assert result == []
+
+    def test_fetch_schedule_success(self):
+        payload = {"matches": [{"id": "m1"}]}
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_schedule("soccer", "eng.1", (datetime.now(), datetime.now()))
+        assert len(result) == 1
+
+    def test_fetch_schedule_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("err")):
+            result = self.source.fetch_schedule("soccer", "eng.1", (datetime.now(), datetime.now()))
+        assert result == []
+
+    def test_fetch_standings_success(self):
+        payload = {"standings": []}
+        with patch.object(self.source.session, "get", return_value=_mock_response(payload)):
+            result = self.source.fetch_standings("soccer", "PL")
+        assert result == payload
+
+    def test_fetch_standings_returns_empty_on_error(self):
+        with patch.object(self.source.session, "get", side_effect=Exception("err")):
+            result = self.source.fetch_standings("soccer", "PL")
+        assert result == {}

test/test_game_helper.py

@@ -0,0 +1,317 @@
+"""
+Tests for src/common/game_helper.py
+
+Covers GameHelper: extract_game_details, filter_*, sort_games_by_time,
+process_games, get_game_summary, and all private helpers.
+"""
+
+import logging
+import pytest
+from datetime import datetime, timezone, timedelta
+
+from src.common.game_helper import GameHelper
+
+
+def _make_logger() -> logging.Logger:
+    return logging.getLogger("test_game_helper")
+
+
+def _make_espn_event(
+    state: str = "in",
+    home_abbr: str = "LAL",
+    away_abbr: str = "BOS",
+    home_score: str = "105",
+    away_score: str = "98",
+    date_str: str = "2024-01-15T20:00:00Z",
+    period: int = 4,
+    status_name: str = "STATUS_IN_PROGRESS",
+    home_record: str = "30-10",
+    away_record: str = "25-15",
+    event_id: str = "game-1",
+) -> dict:
+    return {
+        "id": event_id,
+        "date": date_str,
+        "competitions": [
+            {
+                "status": {
+                    "type": {
+                        "state": state,
+                        "shortDetail": "Q4 2:30",
+                        "name": status_name,
+                    },
+                    "period": period,
+                    "displayClock": "2:30",
+                },
+                "competitors": [
+                    {
+                        "homeAway": "home",
+                        "id": "h1",
+                        "team": {"abbreviation": home_abbr, "displayName": f"{home_abbr} Team"},
+                        "score": home_score,
+                        "records": [{"summary": home_record}],
+                    },
+                    {
+                        "homeAway": "away",
+                        "id": "a1",
+                        "team": {"abbreviation": away_abbr, "displayName": f"{away_abbr} Team"},
+                        "score": away_score,
+                        "records": [{"summary": away_record}],
+                    },
+                ],
+            }
+        ],
+    }
+
+
+@pytest.fixture
+def helper():
+    return GameHelper(timezone_str="UTC", logger=_make_logger())
+
+
+# ---------------------------------------------------------------------------
+# extract_game_details
+# ---------------------------------------------------------------------------
+
+class TestExtractGameDetails:
+    def test_live_game(self, helper):
+        event = _make_espn_event(state="in")
+        result = helper.extract_game_details(event)
+        assert result is not None
+        assert result["is_live"] is True
+        assert result["is_final"] is False
+        assert result["is_upcoming"] is False
+
+    def test_final_game(self, helper):
+        event = _make_espn_event(state="post")
+        result = helper.extract_game_details(event)
+        assert result["is_final"] is True
+
+    def test_upcoming_game(self, helper):
+        event = _make_espn_event(state="pre")
+        result = helper.extract_game_details(event)
+        assert result["is_upcoming"] is True
+
+    def test_halftime_detection(self, helper):
+        event = _make_espn_event(state="halftime", status_name="STATUS_HALFTIME")
+        result = helper.extract_game_details(event)
+        assert result["is_halftime"] is True
+
+    def test_basic_fields_present(self, helper):
+        event = _make_espn_event()
+        result = helper.extract_game_details(event)
+        for key in ("id", "home_abbr", "away_abbr", "home_score", "away_score",
+                    "home_record", "away_record", "start_time_utc"):
+            assert key in result
+
+    def test_team_abbreviations(self, helper):
+        event = _make_espn_event(home_abbr="MIA", away_abbr="PHX")
+        result = helper.extract_game_details(event)
+        assert result["home_abbr"] == "MIA"
+        assert result["away_abbr"] == "PHX"
+
+    def test_scores_as_strings(self, helper):
+        event = _make_espn_event(home_score="110", away_score="99")
+        result = helper.extract_game_details(event)
+        assert result["home_score"] == "110"
+        assert result["away_score"] == "99"
+
+    def test_returns_none_on_empty(self, helper):
+        assert helper.extract_game_details({}) is None
+        assert helper.extract_game_details(None) is None
+
+    def test_returns_none_when_no_competitors(self, helper):
+        event = _make_espn_event()
+        event["competitions"][0]["competitors"] = []
+        assert helper.extract_game_details(event) is None
+
+    def test_date_z_suffix_parsed(self, helper):
+        event = _make_espn_event(date_str="2024-06-01T19:30:00Z")
+        result = helper.extract_game_details(event)
+        assert result["start_time_utc"] is not None
+        assert result["start_time_utc"].tzinfo is not None
+
+    def test_zero_zero_record_suppressed(self, helper):
+        event = _make_espn_event(home_record="0-0", away_record="0-0-0")
+        result = helper.extract_game_details(event)
+        assert result["home_record"] == ""
+        assert result["away_record"] == ""
+
+    def test_basketball_sport_fields(self, helper):
+        event = _make_espn_event(period=3)
+        result = helper.extract_game_details(event, sport="basketball")
+        assert result["period_text"] == "Q3"
+        assert "clock" in result
+
+    def test_basketball_overtime_period(self, helper):
+        event = _make_espn_event(period=5)
+        result = helper.extract_game_details(event, sport="basketball")
+        assert result["period_text"] == "OT1"
+
+    def test_football_sport_fields(self, helper):
+        event = _make_espn_event(period=2)
+        result = helper.extract_game_details(event, sport="football")
+        assert result["period_text"] == "Q2"
+
+    def test_hockey_sport_fields_period_1(self, helper):
+        event = _make_espn_event(period=1)
+        result = helper.extract_game_details(event, sport="hockey")
+        assert result["period_text"] == "P1"
+
+    def test_hockey_sport_fields_ot(self, helper):
+        event = _make_espn_event(period=4)
+        result = helper.extract_game_details(event, sport="hockey")
+        assert result["period_text"] == "OT1"
+
+    def test_baseball_sport_fields(self, helper):
+        event = _make_espn_event(period=7)
+        result = helper.extract_game_details(event, sport="baseball")
+        assert result["period_text"] == "INN 7"
+
+
+# ---------------------------------------------------------------------------
+# Filter methods
+# ---------------------------------------------------------------------------
+
+class TestFilterMethods:
+    def _make_games(self):
+        now = datetime.now(timezone.utc)
+        return [
+            {"is_live": True, "is_final": False, "is_upcoming": False, "home_abbr": "LAL", "away_abbr": "BOS", "start_time_utc": now},
+            {"is_live": False, "is_final": True, "is_upcoming": False, "home_abbr": "MIA", "away_abbr": "PHX", "start_time_utc": now - timedelta(hours=3)},
+            {"is_live": False, "is_final": False, "is_upcoming": True, "home_abbr": "DAL", "away_abbr": "CHI", "start_time_utc": now + timedelta(hours=2)},
+        ]
+
+    def test_filter_live_games(self, helper):
+        games = self._make_games()
+        result = helper.filter_live_games(games)
+        assert len(result) == 1
+        assert result[0]["home_abbr"] == "LAL"
+
+    def test_filter_final_games(self, helper):
+        games = self._make_games()
+        result = helper.filter_final_games(games)
+        assert len(result) == 1
+        assert result[0]["home_abbr"] == "MIA"
+
+    def test_filter_upcoming_games(self, helper):
+        games = self._make_games()
+        result = helper.filter_upcoming_games(games)
+        assert len(result) == 1
+        assert result[0]["home_abbr"] == "DAL"
+
+    def test_filter_favorite_teams_match(self, helper):
+        games = self._make_games()
+        result = helper.filter_favorite_teams(games, ["LAL"])
+        assert len(result) == 1
+        assert result[0]["home_abbr"] == "LAL"
+
+    def test_filter_favorite_teams_empty_list_returns_all(self, helper):
+        games = self._make_games()
+        result = helper.filter_favorite_teams(games, [])
+        assert len(result) == 3
+
+    def test_filter_favorite_teams_away_match(self, helper):
+        games = self._make_games()
+        result = helper.filter_favorite_teams(games, ["BOS"])
+        assert len(result) == 1
+
+    def test_filter_recent_games_within_window(self, helper):
+        now = datetime.now(timezone.utc)
+        games = [
+            {"start_time_utc": now - timedelta(days=2), "is_final": True},
+            {"start_time_utc": now - timedelta(days=10), "is_final": True},
+        ]
+        result = helper.filter_recent_games(games, days_back=7)
+        assert len(result) == 1
+
+    def test_filter_recent_games_all_within(self, helper):
+        now = datetime.now(timezone.utc)
+        games = [
+            {"start_time_utc": now - timedelta(days=1)},
+            {"start_time_utc": now - timedelta(days=3)},
+        ]
+        result = helper.filter_recent_games(games, days_back=7)
+        assert len(result) == 2
+
+    def test_sort_games_ascending(self, helper):
+        now = datetime.now(timezone.utc)
+        games = [
+            {"start_time_utc": now + timedelta(hours=2), "id": "late"},
+            {"start_time_utc": now + timedelta(hours=1), "id": "early"},
+        ]
+        result = helper.sort_games_by_time(games)
+        assert result[0]["id"] == "early"
+
+    def test_sort_games_descending(self, helper):
+        now = datetime.now(timezone.utc)
+        games = [
+            {"start_time_utc": now + timedelta(hours=1), "id": "early"},
+            {"start_time_utc": now + timedelta(hours=2), "id": "late"},
+        ]
+        result = helper.sort_games_by_time(games, reverse=True)
+        assert result[0]["id"] == "late"
+
+
+# ---------------------------------------------------------------------------
+# process_games
+# ---------------------------------------------------------------------------
+
+class TestProcessGames:
+    def test_processes_valid_events(self, helper):
+        events = [
+            _make_espn_event(event_id="1"),
+            _make_espn_event(event_id="2"),
+        ]
+        result = helper.process_games(events)
+        assert len(result) == 2
+
+    def test_skips_invalid_events(self, helper):
+        events = [
+            _make_espn_event(event_id="1"),
+            {},  # invalid
+        ]
+        result = helper.process_games(events)
+        assert len(result) == 1
+
+    def test_empty_events(self, helper):
+        assert helper.process_games([]) == []
+
+
+# ---------------------------------------------------------------------------
+# get_game_summary
+# ---------------------------------------------------------------------------
+
+class TestGetGameSummary:
+    def test_live_summary(self, helper):
+        game = {
+            "home_abbr": "LAL", "away_abbr": "BOS",
+            "home_score": "105", "away_score": "98",
+            "status_text": "Q4 2:30",
+            "is_live": True, "is_final": False,
+        }
+        summary = helper.get_game_summary(game)
+        assert "BOS" in summary
+        assert "LAL" in summary
+        assert "98" in summary
+        assert "105" in summary
+
+    def test_final_summary(self, helper):
+        game = {
+            "home_abbr": "LAL", "away_abbr": "BOS",
+            "home_score": "110", "away_score": "102",
+            "status_text": "Final",
+            "is_live": False, "is_final": True,
+        }
+        summary = helper.get_game_summary(game)
+        assert "Final" in summary
+
+    def test_upcoming_summary(self, helper):
+        game = {
+            "home_abbr": "LAL", "away_abbr": "BOS",
+            "home_score": "0", "away_score": "0",
+            "status_text": "7:30 PM",
+            "is_live": False, "is_final": False,
+        }
+        summary = helper.get_game_summary(game)
+        assert "7:30 PM" in summary

test/test_health_monitor.py

@@ -0,0 +1,307 @@
+"""
+Tests for src/plugin_system/health_monitor.py
+
+Covers PluginHealthMonitor: get_plugin_health_status, get_plugin_health_metrics,
+get_all_plugin_health, _get_recovery_suggestions, start/stop_monitoring,
+register_health_check.
+"""
+
+import pytest
+from unittest.mock import MagicMock, patch
+from datetime import datetime
+
+from src.plugin_system.health_monitor import (
+    PluginHealthMonitor,
+    HealthStatus,
+    HealthMetrics,
+)
+
+
+# ---------------------------------------------------------------------------
+# Fixtures
+# ---------------------------------------------------------------------------
+
+def _make_health_tracker(
+    summary: dict | None = None,
+    all_summaries: dict | None = None,
+):
+    """Return a mock PluginHealthTracker."""
+    tracker = MagicMock()
+    tracker.get_health_summary.return_value = summary
+    tracker.get_all_health_summaries.return_value = all_summaries or {}
+    return tracker
+
+
+def _healthy_summary() -> dict:
+    return {
+        "success_rate": 100.0,
+        "circuit_state": "closed",
+        "consecutive_failures": 0,
+        "total_failures": 0,
+        "total_successes": 50,
+        "last_success_time": datetime.now().isoformat(),
+        "last_error": None,
+    }
+
+
+def _degraded_summary() -> dict:
+    return {
+        "success_rate": 40.0,  # 60% error rate
+        "circuit_state": "closed",
+        "consecutive_failures": 3,
+        "total_failures": 6,
+        "total_successes": 4,
+        "last_success_time": None,
+        "last_error": "timeout occurred",
+    }
+
+
+def _unhealthy_summary() -> dict:
+    return {
+        "success_rate": 10.0,  # 90% error rate
+        "circuit_state": "open",
+        "consecutive_failures": 10,
+        "total_failures": 9,
+        "total_successes": 1,
+        "last_success_time": None,
+        "last_error": "ImportError: missing module",
+    }
+
+
+@pytest.fixture
+def monitor():
+    tracker = _make_health_tracker(_healthy_summary())
+    return PluginHealthMonitor(health_tracker=tracker)
+
+
+# ---------------------------------------------------------------------------
+# get_plugin_health_status
+# ---------------------------------------------------------------------------
+
+class TestGetPluginHealthStatus:
+    def test_healthy_status(self):
+        tracker = _make_health_tracker(_healthy_summary())
+        monitor = PluginHealthMonitor(tracker)
+        status = monitor.get_plugin_health_status("plugin_a")
+        assert status == HealthStatus.HEALTHY
+
+    def test_degraded_status(self):
+        tracker = _make_health_tracker(_degraded_summary())
+        monitor = PluginHealthMonitor(tracker, degraded_threshold=0.5, unhealthy_threshold=0.8)
+        status = monitor.get_plugin_health_status("plugin_b")
+        assert status == HealthStatus.DEGRADED
+
+    def test_unhealthy_status(self):
+        tracker = _make_health_tracker(_unhealthy_summary())
+        monitor = PluginHealthMonitor(tracker, unhealthy_threshold=0.8)
+        status = monitor.get_plugin_health_status("plugin_c")
+        assert status == HealthStatus.UNHEALTHY
+
+    def test_open_circuit_breaker_is_unhealthy(self):
+        summary = _healthy_summary()
+        summary["circuit_state"] = "open"
+        tracker = _make_health_tracker(summary)
+        monitor = PluginHealthMonitor(tracker)
+        status = monitor.get_plugin_health_status("plugin_d")
+        assert status == HealthStatus.UNHEALTHY
+
+    def test_unknown_when_no_tracker(self):
+        monitor = PluginHealthMonitor(health_tracker=None)
+        status = monitor.get_plugin_health_status("plugin_e")
+        assert status == HealthStatus.UNKNOWN
+
+    def test_unknown_when_no_summary(self):
+        tracker = _make_health_tracker(None)
+        monitor = PluginHealthMonitor(tracker)
+        status = monitor.get_plugin_health_status("plugin_f")
+        assert status == HealthStatus.UNKNOWN
+
+
+# ---------------------------------------------------------------------------
+# get_plugin_health_metrics
+# ---------------------------------------------------------------------------
+
+class TestGetPluginHealthMetrics:
+    def test_healthy_metrics(self):
+        tracker = _make_health_tracker(_healthy_summary())
+        monitor = PluginHealthMonitor(tracker)
+        metrics = monitor.get_plugin_health_metrics("plugin_a")
+        assert isinstance(metrics, HealthMetrics)
+        assert metrics.status == HealthStatus.HEALTHY
+        assert metrics.success_rate == pytest.approx(1.0)
+        assert metrics.error_rate == pytest.approx(0.0)
+
+    def test_degraded_metrics(self):
+        tracker = _make_health_tracker(_degraded_summary())
+        monitor = PluginHealthMonitor(tracker, degraded_threshold=0.5, unhealthy_threshold=0.8)
+        metrics = monitor.get_plugin_health_metrics("plugin_b")
+        assert metrics.status == HealthStatus.DEGRADED
+        assert metrics.consecutive_failures == 3
+
+    def test_unhealthy_metrics(self):
+        tracker = _make_health_tracker(_unhealthy_summary())
+        monitor = PluginHealthMonitor(tracker, unhealthy_threshold=0.8)
+        metrics = monitor.get_plugin_health_metrics("plugin_c")
+        assert metrics.status == HealthStatus.UNHEALTHY
+        assert metrics.circuit_breaker_state == "open"
+        assert metrics.last_error is not None
+
+    def test_metrics_without_tracker(self):
+        monitor = PluginHealthMonitor(health_tracker=None)
+        metrics = monitor.get_plugin_health_metrics("plugin_d")
+        assert metrics.status == HealthStatus.UNKNOWN
+        assert metrics.plugin_id == "plugin_d"
+
+    def test_metrics_without_summary(self):
+        tracker = _make_health_tracker(None)
+        monitor = PluginHealthMonitor(tracker)
+        metrics = monitor.get_plugin_health_metrics("plugin_e")
+        assert metrics.status == HealthStatus.UNKNOWN
+
+    def test_last_successful_update_parsed(self):
+        summary = _healthy_summary()
+        summary["last_success_time"] = "2024-06-01T12:00:00"
+        tracker = _make_health_tracker(summary)
+        monitor = PluginHealthMonitor(tracker)
+        metrics = monitor.get_plugin_health_metrics("plugin_a")
+        assert metrics.last_successful_update is not None
+        assert isinstance(metrics.last_successful_update, datetime)
+
+    def test_invalid_last_success_time_handled(self):
+        summary = _healthy_summary()
+        summary["last_success_time"] = "not-a-date"
+        tracker = _make_health_tracker(summary)
+        monitor = PluginHealthMonitor(tracker)
+        # Should not raise
+        metrics = monitor.get_plugin_health_metrics("plugin_a")
+        assert metrics.last_successful_update is None
+
+    def test_total_successes_failures(self):
+        tracker = _make_health_tracker(_degraded_summary())
+        monitor = PluginHealthMonitor(tracker, degraded_threshold=0.5, unhealthy_threshold=0.8)
+        metrics = monitor.get_plugin_health_metrics("plugin_b")
+        assert metrics.total_failures == 6
+        assert metrics.total_successes == 4
+
+
+# ---------------------------------------------------------------------------
+# get_all_plugin_health
+# ---------------------------------------------------------------------------
+
+class TestGetAllPluginHealth:
+    def test_returns_empty_without_tracker(self):
+        monitor = PluginHealthMonitor(health_tracker=None)
+        result = monitor.get_all_plugin_health()
+        assert result == {}
+
+    def test_returns_metrics_for_each_plugin(self):
+        all_summaries = {
+            "plugin_a": _healthy_summary(),
+            "plugin_b": _degraded_summary(),
+        }
+        tracker = MagicMock()
+        tracker.get_all_health_summaries.return_value = all_summaries
+        tracker.get_health_summary.side_effect = lambda pid: all_summaries.get(pid)
+        monitor = PluginHealthMonitor(tracker, degraded_threshold=0.5, unhealthy_threshold=0.8)
+        result = monitor.get_all_plugin_health()
+        assert "plugin_a" in result
+        assert "plugin_b" in result
+        assert isinstance(result["plugin_a"], HealthMetrics)
+
+    def test_returns_empty_when_no_summaries(self):
+        tracker = _make_health_tracker(all_summaries={})
+        monitor = PluginHealthMonitor(tracker)
+        result = monitor.get_all_plugin_health()
+        assert result == {}
+
+
+# ---------------------------------------------------------------------------
+# _get_recovery_suggestions
+# ---------------------------------------------------------------------------
+
+class TestGetRecoverySuggestions:
+    def test_healthy_plugin_suggestion(self):
+        tracker = _make_health_tracker(_healthy_summary())
+        monitor = PluginHealthMonitor(tracker)
+        suggestions = monitor._get_recovery_suggestions("p", _healthy_summary(), HealthStatus.HEALTHY)
+        assert any("healthy" in s.lower() for s in suggestions)
+
+    def test_unhealthy_suggestions(self):
+        tracker = _make_health_tracker(_unhealthy_summary())
+        monitor = PluginHealthMonitor(tracker, unhealthy_threshold=0.8)
+        suggestions = monitor._get_recovery_suggestions("p", _unhealthy_summary(), HealthStatus.UNHEALTHY)
+        assert len(suggestions) > 0
+        assert any("unhealthy" in s.lower() for s in suggestions)
+
+    def test_open_circuit_breaker_suggestion(self):
+        summary = _unhealthy_summary()
+        summary["circuit_state"] = "open"
+        tracker = _make_health_tracker(summary)
+        monitor = PluginHealthMonitor(tracker, unhealthy_threshold=0.8)
+        suggestions = monitor._get_recovery_suggestions("p", summary, HealthStatus.UNHEALTHY)
+        assert any("circuit" in s.lower() for s in suggestions)
+
+    def test_timeout_error_suggestion(self):
+        summary = _degraded_summary()
+        summary["last_error"] = "connection timeout occurred"
+        tracker = _make_health_tracker(summary)
+        monitor = PluginHealthMonitor(tracker, degraded_threshold=0.5, unhealthy_threshold=0.8)
+        suggestions = monitor._get_recovery_suggestions("p", summary, HealthStatus.DEGRADED)
+        assert any("timeout" in s.lower() for s in suggestions)
+
+    def test_import_error_suggestion(self):
+        summary = _unhealthy_summary()
+        summary["last_error"] = "ImportError: missing module"
+        tracker = _make_health_tracker(summary)
+        monitor = PluginHealthMonitor(tracker, unhealthy_threshold=0.8)
+        suggestions = monitor._get_recovery_suggestions("p", summary, HealthStatus.UNHEALTHY)
+        assert any("dependencies" in s.lower() or "import" in s.lower() or "missing" in s.lower()
+                   for s in suggestions)
+
+    def test_permission_error_suggestion(self):
+        summary = _unhealthy_summary()
+        summary["last_error"] = "permission denied to access resource"
+        tracker = _make_health_tracker(summary)
+        monitor = PluginHealthMonitor(tracker, unhealthy_threshold=0.8)
+        suggestions = monitor._get_recovery_suggestions("p", summary, HealthStatus.UNHEALTHY)
+        assert any("permission" in s.lower() for s in suggestions)
+
+    def test_degraded_suggestions_include_error_rate(self):
+        tracker = _make_health_tracker(_degraded_summary())
+        monitor = PluginHealthMonitor(tracker, degraded_threshold=0.5, unhealthy_threshold=0.8)
+        suggestions = monitor._get_recovery_suggestions("p", _degraded_summary(), HealthStatus.DEGRADED)
+        assert any("%" in s for s in suggestions)
+
+
+# ---------------------------------------------------------------------------
+# start / stop monitoring
+# ---------------------------------------------------------------------------
+
+class TestMonitorLifecycle:
+    def test_start_monitoring(self, monitor):
+        monitor.start_monitoring()
+        try:
+            assert monitor._monitor_thread is not None
+            assert monitor._monitor_thread.is_alive()
+        finally:
+            monitor.stop_monitoring()
+
+    def test_stop_monitoring(self, monitor):
+        monitor.start_monitoring()
+        monitor.stop_monitoring()
+        # Thread should no longer be alive
+        assert not monitor._monitor_thread.is_alive()
+
+    def test_double_start_no_duplicate_threads(self, monitor):
+        monitor.start_monitoring()
+        try:
+            thread1 = monitor._monitor_thread
+            monitor.start_monitoring()  # should be idempotent
+            assert monitor._monitor_thread is thread1
+        finally:
+            monitor.stop_monitoring()
+
+    def test_register_health_check(self, monitor):
+        callback = MagicMock()
+        monitor.register_health_check(callback)
+        assert callback in monitor._health_check_callbacks

test/test_logo_downloader.py

@@ -0,0 +1,129 @@
+"""
+Tests for src/logo_downloader.py
+
+Focuses on the pure/static methods that don't require network calls:
+normalize_abbreviation, get_logo_filename_variations, get_logo_directory,
+ensure_logo_directory, and the download_missing_logo function path
+(with HTTP mocked).
+"""
+
+import os
+import pytest
+from pathlib import Path
+from unittest.mock import patch, Mock, MagicMock
+
+from src.logo_downloader import LogoDownloader
+
+
+# ---------------------------------------------------------------------------
+# normalize_abbreviation
+# ---------------------------------------------------------------------------
+
+class TestNormalizeAbbreviation:
+    def test_basic_lowercase(self):
+        result = LogoDownloader.normalize_abbreviation("lal")
+        assert result == "LAL"
+
+    def test_uppercases(self):
+        result = LogoDownloader.normalize_abbreviation("bos")
+        assert result == "BOS"
+
+    def test_ampersand_replaced(self):
+        result = LogoDownloader.normalize_abbreviation("TA&M")
+        assert "&" not in result
+        assert "AND" in result
+
+    def test_forward_slash_replaced(self):
+        result = LogoDownloader.normalize_abbreviation("A/B")
+        assert "/" not in result
+
+    def test_empty_returns_empty(self):
+        result = LogoDownloader.normalize_abbreviation("")
+        assert result == ""
+
+
+# ---------------------------------------------------------------------------
+# get_logo_filename_variations
+# ---------------------------------------------------------------------------
+
+class TestGetLogoFilenameVariations:
+    def test_returns_list(self):
+        result = LogoDownloader.get_logo_filename_variations("LAL")
+        assert isinstance(result, list)
+        assert len(result) > 0
+
+    def test_includes_png(self):
+        result = LogoDownloader.get_logo_filename_variations("KC")
+        filenames = " ".join(result)
+        assert ".png" in filenames
+
+    def test_includes_original(self):
+        result = LogoDownloader.get_logo_filename_variations("LAL")
+        assert any("LAL" in f for f in result)
+
+    def test_ampersand_variation(self):
+        result = LogoDownloader.get_logo_filename_variations("TA&M")
+        # Should produce at least the normalized version
+        assert len(result) > 0
+
+    def test_empty_string_no_crash(self):
+        result = LogoDownloader.get_logo_filename_variations("")
+        assert isinstance(result, list)
+
+
+# ---------------------------------------------------------------------------
+# get_logo_directory
+# ---------------------------------------------------------------------------
+
+class TestGetLogoDirectory:
+    def test_known_sport_returns_string(self):
+        downloader = LogoDownloader()
+        result = downloader.get_logo_directory("nfl")
+        assert isinstance(result, str)
+        assert len(result) > 0
+
+    def test_known_sport_nba(self):
+        downloader = LogoDownloader()
+        result = downloader.get_logo_directory("nba")
+        assert "nba" in result.lower() or "sports" in result.lower()
+
+    def test_unknown_sport_returns_string(self):
+        downloader = LogoDownloader()
+        result = downloader.get_logo_directory("unknown_sport_xyz")
+        assert isinstance(result, str)
+
+
+# ---------------------------------------------------------------------------
+# ensure_logo_directory
+# ---------------------------------------------------------------------------
+
+class TestEnsureLogoDirectory:
+    def test_creates_writable_directory(self, tmp_path):
+        downloader = LogoDownloader()
+        test_dir = str(tmp_path / "logos" / "nfl")
+        result = downloader.ensure_logo_directory(test_dir)
+        assert result is True
+        assert Path(test_dir).is_dir()
+
+    def test_existing_writable_directory(self, tmp_path):
+        downloader = LogoDownloader()
+        test_dir = str(tmp_path)
+        result = downloader.ensure_logo_directory(test_dir)
+        assert result is True
+
+    def test_returns_false_when_write_test_fails(self, tmp_path):
+        """Simulate a directory that exists but raises PermissionError on write."""
+        downloader = LogoDownloader()
+        test_dir = str(tmp_path / "logos")
+
+        import builtins
+        original_open = builtins.open
+
+        def mock_open(path, *args, **kwargs):
+            if ".write_test" in str(path):
+                raise PermissionError("no write access")
+            return original_open(path, *args, **kwargs)
+
+        with patch("builtins.open", side_effect=mock_open):
+            result = downloader.ensure_logo_directory(test_dir)
+        assert result is False

test/test_scroll_helper.py

@@ -0,0 +1,317 @@
+"""
+Tests for src/common/scroll_helper.py
+
+Covers ScrollHelper: create_scrolling_image, update_scroll_position,
+get_visible_portion, calculate_dynamic_duration, set_* methods,
+reset_scroll, clear_cache, get_scroll_info.
+"""
+
+import pytest
+import time
+from unittest.mock import patch
+from PIL import Image
+
+from src.common.scroll_helper import ScrollHelper
+
+
+DISPLAY_W = 64
+DISPLAY_H = 32
+
+
+@pytest.fixture
+def helper():
+    return ScrollHelper(display_width=DISPLAY_W, display_height=DISPLAY_H)
+
+
+def _make_image(width: int = 64, height: int = 32, color=(255, 0, 0)) -> Image.Image:
+    img = Image.new("RGB", (width, height), color)
+    return img
+
+
+# ---------------------------------------------------------------------------
+# __init__ / initial state
+# ---------------------------------------------------------------------------
+
+class TestScrollHelperInit:
+    def test_initial_scroll_position(self, helper):
+        assert helper.scroll_position == 0.0
+
+    def test_initial_scroll_complete_false(self, helper):
+        assert helper.scroll_complete is False
+
+    def test_display_dimensions(self, helper):
+        assert helper.display_width == DISPLAY_W
+        assert helper.display_height == DISPLAY_H
+
+
+# ---------------------------------------------------------------------------
+# create_scrolling_image
+# ---------------------------------------------------------------------------
+
+class TestCreateScrollingImage:
+    def test_empty_content_returns_blank_image(self, helper):
+        result = helper.create_scrolling_image([])
+        assert isinstance(result, Image.Image)
+        assert helper.total_scroll_width == 0
+
+    def test_single_item_creates_image(self, helper):
+        img = _make_image(width=100)
+        result = helper.create_scrolling_image([img])
+        assert isinstance(result, Image.Image)
+        assert result.width > DISPLAY_W  # includes leading gap
+
+    def test_multiple_items_wider_image(self, helper):
+        items = [_make_image(width=50), _make_image(width=50)]
+        result = helper.create_scrolling_image(items)
+        # Should be wider than two items alone
+        assert result.width > 100
+
+    def test_scroll_position_reset(self, helper):
+        helper.scroll_position = 500.0
+        helper.create_scrolling_image([_make_image()])
+        assert helper.scroll_position == 0.0
+
+    def test_cached_array_set(self, helper):
+        helper.create_scrolling_image([_make_image()])
+        assert helper.cached_array is not None
+
+    def test_scroll_complete_reset(self, helper):
+        helper.scroll_complete = True
+        helper.create_scrolling_image([_make_image()])
+        assert helper.scroll_complete is False
+
+    def test_total_scroll_width_matches_image(self, helper):
+        img = _make_image(width=200)
+        result = helper.create_scrolling_image([img])
+        assert helper.total_scroll_width == result.width
+
+
+# ---------------------------------------------------------------------------
+# set_scrolling_image
+# ---------------------------------------------------------------------------
+
+class TestSetScrollingImage:
+    def test_sets_cached_image(self, helper):
+        img = _make_image(width=200)
+        helper.set_scrolling_image(img)
+        assert helper.cached_image is img
+
+    def test_sets_cached_array(self, helper):
+        img = _make_image(width=200)
+        helper.set_scrolling_image(img)
+        assert helper.cached_array is not None
+
+    def test_scroll_width_matches_image(self, helper):
+        img = _make_image(width=300)
+        helper.set_scrolling_image(img)
+        assert helper.total_scroll_width == 300
+
+    def test_none_clears_cache(self, helper):
+        helper.set_scrolling_image(_make_image())
+        helper.set_scrolling_image(None)
+        assert helper.cached_image is None
+
+
+# ---------------------------------------------------------------------------
+# update_scroll_position (time-based mode)
+# ---------------------------------------------------------------------------
+
+class TestUpdateScrollPosition:
+    def test_position_advances_over_time(self, helper):
+        helper.create_scrolling_image([_make_image(width=200)])
+        helper.scroll_speed = 100.0  # 100 px/s
+        helper.last_update_time = time.time() - 0.1  # pretend 100ms elapsed
+        initial = helper.scroll_position
+        helper.update_scroll_position()
+        assert helper.scroll_position > initial
+
+    def test_no_advance_without_image(self, helper):
+        helper.update_scroll_position()  # no image, should not crash
+        assert helper.scroll_position == 0.0
+
+    def test_zero_width_content_stays_zero(self, helper):
+        helper.create_scrolling_image([])  # empty → width 0
+        helper.update_scroll_position()
+        assert helper.scroll_position == 0.0
+
+    def test_scroll_complete_clamped(self, helper):
+        helper.create_scrolling_image([_make_image(width=100)])
+        # Force position past the end
+        helper.scroll_position = helper.total_scroll_width + 50
+        helper.total_distance_scrolled = helper.total_scroll_width + 50
+        helper.update_scroll_position()
+        assert helper.scroll_complete is True
+        assert helper.scroll_position <= helper.total_scroll_width
+
+
+# ---------------------------------------------------------------------------
+# get_visible_portion
+# ---------------------------------------------------------------------------
+
+class TestGetVisiblePortion:
+    def test_returns_none_without_image(self, helper):
+        assert helper.get_visible_portion() is None
+
+    def test_returns_image_sized_to_display(self, helper):
+        helper.create_scrolling_image([_make_image(width=200)])
+        visible = helper.get_visible_portion()
+        assert visible is not None
+        assert visible.width == DISPLAY_W
+        assert visible.height == DISPLAY_H
+
+    def test_different_positions_give_different_images(self, helper):
+        helper.create_scrolling_image([_make_image(width=300)])
+        img1 = helper.get_visible_portion()
+        helper.scroll_position = 50
+        img2 = helper.get_visible_portion()
+        # Images should differ (colour from scrolled content)
+        # Just verify both are valid PIL images with correct size
+        assert img1.width == img2.width == DISPLAY_W
+
+
+# ---------------------------------------------------------------------------
+# reset_scroll / clear_cache
+# ---------------------------------------------------------------------------
+
+class TestResetAndClear:
+    def test_reset_restores_position(self, helper):
+        helper.create_scrolling_image([_make_image(width=200)])
+        helper.scroll_position = 100.0
+        helper.reset_scroll()
+        assert helper.scroll_position == 0.0
+
+    def test_reset_clears_complete_flag(self, helper):
+        helper.scroll_complete = True
+        helper.reset_scroll()
+        assert helper.scroll_complete is False
+
+    def test_reset_alias(self, helper):
+        helper.scroll_position = 50.0
+        helper.reset()
+        assert helper.scroll_position == 0.0
+
+    def test_clear_cache(self, helper):
+        helper.create_scrolling_image([_make_image()])
+        helper.clear_cache()
+        assert helper.cached_image is None
+        assert helper.cached_array is None
+        assert helper.total_scroll_width == 0
+
+
+# ---------------------------------------------------------------------------
+# calculate_dynamic_duration
+# ---------------------------------------------------------------------------
+
+class TestCalculateDynamicDuration:
+    def test_returns_min_when_disabled(self, helper):
+        helper.dynamic_duration_enabled = False
+        helper.min_duration = 30
+        result = helper.calculate_dynamic_duration()
+        assert result == 30
+
+    def test_returns_min_when_no_content(self, helper):
+        helper.total_scroll_width = 0
+        helper.min_duration = 30
+        result = helper.calculate_dynamic_duration()
+        assert result == 30
+
+    def test_respects_min_duration(self, helper):
+        helper.create_scrolling_image([_make_image(width=50)])
+        helper.min_duration = 60
+        helper.max_duration = 300
+        helper.scroll_speed = 500.0  # very fast → very short time
+        result = helper.calculate_dynamic_duration()
+        assert result >= 60
+
+    def test_respects_max_duration(self, helper):
+        helper.create_scrolling_image([_make_image(width=5000)])
+        helper.min_duration = 10
+        helper.max_duration = 60
+        helper.scroll_speed = 1.0  # very slow → very long time
+        result = helper.calculate_dynamic_duration()
+        assert result <= 60
+
+    def test_time_based_calculation(self, helper):
+        helper.create_scrolling_image([_make_image(width=200)])
+        helper.scroll_speed = 100.0
+        helper.min_duration = 1
+        helper.max_duration = 600
+        helper.frame_based_scrolling = False
+        result = helper.calculate_dynamic_duration()
+        assert isinstance(result, int)
+        assert result > 0
+
+
+# ---------------------------------------------------------------------------
+# set_* configuration methods
+# ---------------------------------------------------------------------------
+
+class TestSetMethods:
+    def test_set_scroll_speed_time_based(self, helper):
+        helper.frame_based_scrolling = False
+        helper.set_scroll_speed(50.0)
+        assert helper.scroll_speed == 50.0
+
+    def test_set_scroll_speed_clamped_low(self, helper):
+        helper.frame_based_scrolling = False
+        helper.set_scroll_speed(0.0)
+        assert helper.scroll_speed >= 1.0
+
+    def test_set_scroll_speed_clamped_high(self, helper):
+        helper.frame_based_scrolling = False
+        helper.set_scroll_speed(10000.0)
+        assert helper.scroll_speed <= 500.0
+
+    def test_set_scroll_delay(self, helper):
+        helper.set_scroll_delay(0.05)
+        assert helper.scroll_delay == 0.05
+
+    def test_set_scroll_delay_clamped(self, helper):
+        helper.set_scroll_delay(0.0001)
+        assert helper.scroll_delay >= 0.001
+
+    def test_set_target_fps(self, helper):
+        helper.set_target_fps(60.0)
+        assert helper.target_fps == 60.0
+
+    def test_set_target_fps_clamped(self, helper):
+        helper.set_target_fps(1000.0)
+        assert helper.target_fps <= 200.0
+
+    def test_set_sub_pixel_scrolling(self, helper):
+        helper.set_sub_pixel_scrolling(True)
+        assert helper.sub_pixel_scrolling is True
+        helper.set_sub_pixel_scrolling(False)
+        assert helper.sub_pixel_scrolling is False
+
+    def test_set_frame_based_scrolling(self, helper):
+        helper.set_frame_based_scrolling(True)
+        assert helper.frame_based_scrolling is True
+
+    def test_set_dynamic_duration_settings(self, helper):
+        helper.set_dynamic_duration_settings(enabled=True, min_duration=20, max_duration=120, buffer=0.2)
+        assert helper.dynamic_duration_enabled is True
+        assert helper.min_duration == 20
+        assert helper.max_duration == 120
+        assert helper.duration_buffer == pytest.approx(0.2)
+
+
+# ---------------------------------------------------------------------------
+# get_scroll_info
+# ---------------------------------------------------------------------------
+
+class TestGetScrollInfo:
+    def test_returns_dict(self, helper):
+        info = helper.get_scroll_info()
+        assert isinstance(info, dict)
+
+    def test_required_keys(self, helper):
+        info = helper.get_scroll_info()
+        for key in ("scroll_position", "total_distance_scrolled", "scroll_speed",
+                    "scroll_complete", "dynamic_duration"):
+            assert key in info
+
+    def test_scroll_position_reflected(self, helper):
+        helper.scroll_position = 42.0
+        info = helper.get_scroll_info()
+        assert info["scroll_position"] == 42.0

test/test_utils.py

@@ -0,0 +1,329 @@
+"""
+Tests for src/common/utils.py
+
+Covers all pure utility functions: normalize_team_abbreviation, format_time,
+format_date, get_timezone, validate_dimensions, parse_team_abbreviation,
+format_score, format_period, is_live_game, is_final_game, is_upcoming_game,
+sanitize_filename, truncate_text, parse_boolean.
+"""
+
+import pytest
+from datetime import datetime, timezone
+import pytz
+
+from src.common.utils import (
+    normalize_team_abbreviation,
+    format_time,
+    format_date,
+    get_timezone,
+    validate_dimensions,
+    parse_team_abbreviation,
+    format_score,
+    format_period,
+    is_live_game,
+    is_final_game,
+    is_upcoming_game,
+    sanitize_filename,
+    truncate_text,
+    parse_boolean,
+)
+
+
+# ---------------------------------------------------------------------------
+# normalize_team_abbreviation
+# ---------------------------------------------------------------------------
+
+class TestNormalizeTeamAbbreviation:
+    def test_basic_uppercase(self):
+        assert normalize_team_abbreviation("lal") == "LAL"
+
+    def test_strips_spaces(self):
+        assert normalize_team_abbreviation("  KC  ") == "KC"
+
+    def test_replaces_ampersand(self):
+        assert normalize_team_abbreviation("TA&M") == "TAANDM"
+
+    def test_removes_internal_spaces(self):
+        assert normalize_team_abbreviation("A B") == "AB"
+
+    def test_removes_hyphens(self):
+        assert normalize_team_abbreviation("A-B") == "AB"
+
+    def test_empty_string_returns_empty(self):
+        assert normalize_team_abbreviation("") == ""
+
+    def test_none_returns_empty(self):
+        assert normalize_team_abbreviation(None) == ""
+
+
+# ---------------------------------------------------------------------------
+# format_time / format_date
+# ---------------------------------------------------------------------------
+
+class TestFormatTime:
+    def _utc_dt(self, hour=20, minute=30):
+        return datetime(2024, 1, 15, hour, minute, 0, tzinfo=timezone.utc)
+
+    def test_formats_utc_to_utc(self):
+        dt = self._utc_dt(20, 30)
+        result = format_time(dt, timezone_str="UTC")
+        # 20:30 UTC → "8:30PM" (leading zero stripped)
+        assert "8:30PM" in result or "8:30 PM" in result or result != ""
+
+    def test_naive_datetime_treated_as_utc(self):
+        dt = datetime(2024, 1, 15, 12, 0, 0)  # naive
+        result = format_time(dt, timezone_str="UTC")
+        assert result != ""
+
+    def test_invalid_timezone_returns_empty(self):
+        dt = self._utc_dt()
+        result = format_time(dt, timezone_str="Invalid/TZ")
+        assert result == ""
+
+    def test_eastern_timezone(self):
+        dt = self._utc_dt(20, 0)  # 8 PM UTC = 3 PM ET
+        result = format_time(dt, timezone_str="America/New_York")
+        assert result != ""
+
+
+class TestFormatDate:
+    def test_formats_date(self):
+        dt = datetime(2024, 6, 15, 18, 0, 0, tzinfo=timezone.utc)
+        result = format_date(dt, timezone_str="UTC")
+        assert "June" in result or "15" in result
+
+    def test_naive_datetime(self):
+        dt = datetime(2024, 3, 10, 12, 0, 0)
+        result = format_date(dt, timezone_str="UTC")
+        assert result != ""
+
+    def test_invalid_timezone_returns_empty(self):
+        dt = datetime(2024, 6, 15, 18, 0, 0, tzinfo=timezone.utc)
+        result = format_date(dt, timezone_str="BadZone/Here")
+        assert result == ""
+
+
+# ---------------------------------------------------------------------------
+# get_timezone
+# ---------------------------------------------------------------------------
+
+class TestGetTimezone:
+    def test_valid_timezone(self):
+        tz = get_timezone("America/New_York")
+        assert tz is not None
+
+    def test_utc(self):
+        tz = get_timezone("UTC")
+        assert tz is pytz.utc or str(tz) == "UTC"
+
+    def test_invalid_returns_utc(self):
+        tz = get_timezone("Not/ATimezone")
+        assert tz is pytz.utc
+
+
+# ---------------------------------------------------------------------------
+# validate_dimensions
+# ---------------------------------------------------------------------------
+
+class TestValidateDimensions:
+    def test_valid(self):
+        assert validate_dimensions(64, 32) is True
+
+    def test_zero_width(self):
+        assert validate_dimensions(0, 32) is False
+
+    def test_zero_height(self):
+        assert validate_dimensions(64, 0) is False
+
+    def test_negative(self):
+        assert validate_dimensions(-1, 32) is False
+
+    def test_too_large(self):
+        assert validate_dimensions(1001, 32) is False
+
+    def test_max_valid(self):
+        assert validate_dimensions(1000, 1000) is True
+
+    def test_non_integer(self):
+        assert validate_dimensions("64", 32) is False  # type: ignore[arg-type]
+
+
+# ---------------------------------------------------------------------------
+# parse_team_abbreviation
+# ---------------------------------------------------------------------------
+
+class TestParseTeamAbbreviation:
+    def test_empty_string(self):
+        assert parse_team_abbreviation("") == ""
+
+    def test_none_returns_empty(self):
+        assert parse_team_abbreviation(None) == ""
+
+    def test_extracts_uppercase(self):
+        result = parse_team_abbreviation("LAL")
+        assert result == "LAL"
+
+    def test_fallback_first_three(self):
+        # text without recognisable 2-4 char uppercase block
+        result = parse_team_abbreviation("ab")
+        assert len(result) <= 3
+
+
+# ---------------------------------------------------------------------------
+# format_score
+# ---------------------------------------------------------------------------
+
+class TestFormatScore:
+    def test_format_score(self):
+        assert format_score(14, 7) == "7-14"
+
+    def test_format_score_strings(self):
+        assert format_score("21", "14") == "14-21"
+
+    def test_zero_zero(self):
+        assert format_score(0, 0) == "0-0"
+
+
+# ---------------------------------------------------------------------------
+# format_period
+# ---------------------------------------------------------------------------
+
+class TestFormatPeriod:
+    def test_basketball_q1(self):
+        assert format_period(1, "basketball") == "Q1"
+
+    def test_basketball_q4(self):
+        assert format_period(4, "basketball") == "Q4"
+
+    def test_basketball_ot1(self):
+        assert format_period(5, "basketball") == "OT1"
+
+    def test_basketball_ot2(self):
+        assert format_period(6, "basketball") == "OT2"
+
+    def test_football_q1(self):
+        assert format_period(1, "football") == "Q1"
+
+    def test_football_ot(self):
+        assert format_period(5, "football") == "OT1"
+
+    def test_hockey_p1(self):
+        assert format_period(1, "hockey") == "P1"
+
+    def test_hockey_p3(self):
+        assert format_period(3, "hockey") == "P3"
+
+    def test_hockey_ot(self):
+        assert format_period(4, "hockey") == "OT1"
+
+    def test_baseball_inning(self):
+        assert format_period(7, "baseball") == "INN 7"
+
+    def test_unknown_sport(self):
+        result = format_period(2, "unknown")
+        assert "2" in result
+
+
+# ---------------------------------------------------------------------------
+# is_live_game / is_final_game / is_upcoming_game
+# ---------------------------------------------------------------------------
+
+class TestGameStatusHelpers:
+    def test_is_live_game_true(self):
+        assert is_live_game("In Progress") is True
+        assert is_live_game("halftime") is True
+        assert is_live_game("overtime") is True
+
+    def test_is_live_game_false(self):
+        assert is_live_game("Final") is False
+        assert is_live_game("Scheduled") is False
+
+    def test_is_final_game_true(self):
+        assert is_final_game("Final") is True
+        assert is_final_game("COMPLETED") is True
+
+    def test_is_final_game_false(self):
+        assert is_final_game("In Progress") is False
+
+    def test_is_upcoming_game_true(self):
+        assert is_upcoming_game("Scheduled") is True
+        assert is_upcoming_game("upcoming") is True
+
+    def test_is_upcoming_game_false(self):
+        assert is_upcoming_game("Final") is False
+        assert is_upcoming_game("In Progress") is False
+
+
+# ---------------------------------------------------------------------------
+# sanitize_filename
+# ---------------------------------------------------------------------------
+
+class TestSanitizeFilename:
+    def test_removes_invalid_chars(self):
+        result = sanitize_filename('file<>:"/\\|?*.txt')
+        assert "<" not in result
+        assert ">" not in result
+        assert ":" not in result
+
+    def test_collapses_underscores(self):
+        result = sanitize_filename("file___name")
+        assert "__" not in result
+
+    def test_strips_leading_trailing(self):
+        result = sanitize_filename("_file_")
+        assert not result.startswith("_")
+        assert not result.endswith("_")
+
+    def test_normal_filename_unchanged(self):
+        result = sanitize_filename("my_logo")
+        assert result == "my_logo"
+
+
+# ---------------------------------------------------------------------------
+# truncate_text
+# ---------------------------------------------------------------------------
+
+class TestTruncateText:
+    def test_no_truncation_needed(self):
+        assert truncate_text("hello", 10) == "hello"
+
+    def test_truncation_adds_suffix(self):
+        result = truncate_text("hello world", 8)
+        assert result.endswith("...")
+        assert len(result) == 8
+
+    def test_exact_length(self):
+        assert truncate_text("hello", 5) == "hello"
+
+    def test_custom_suffix(self):
+        result = truncate_text("hello world", 8, suffix="~")
+        assert result.endswith("~")
+
+
+# ---------------------------------------------------------------------------
+# parse_boolean
+# ---------------------------------------------------------------------------
+
+class TestParseBoolean:
+    def test_true_bool(self):
+        assert parse_boolean(True) is True
+
+    def test_false_bool(self):
+        assert parse_boolean(False) is False
+
+    def test_int_1(self):
+        assert parse_boolean(1) is True
+
+    def test_int_0(self):
+        assert parse_boolean(0) is False
+
+    def test_string_true(self):
+        for val in ("true", "True", "TRUE", "1", "yes", "on", "enabled"):
+            assert parse_boolean(val) is True, f"Expected True for {val!r}"
+
+    def test_string_false(self):
+        for val in ("false", "False", "0", "no", "off", "disabled"):
+            assert parse_boolean(val) is False, f"Expected False for {val!r}"
+
+    def test_none_returns_false(self):
+        assert parse_boolean(None) is False  # type: ignore[arg-type]

test/test_vegas_config.py

@@ -0,0 +1,310 @@
+"""
+Tests for src/vegas_mode/config.py
+
+Covers VegasModeConfig: from_config, to_dict, get_frame_interval,
+is_plugin_included, get_ordered_plugins, validate, update.
+"""
+
+import pytest
+from src.vegas_mode.config import VegasModeConfig
+
+
+# ---------------------------------------------------------------------------
+# Default construction
+# ---------------------------------------------------------------------------
+
+class TestVegasModeConfigDefaults:
+    def test_default_disabled(self):
+        cfg = VegasModeConfig()
+        assert cfg.enabled is False
+
+    def test_default_scroll_speed(self):
+        cfg = VegasModeConfig()
+        assert cfg.scroll_speed == 50.0
+
+    def test_default_separator_width(self):
+        cfg = VegasModeConfig()
+        assert cfg.separator_width == 32
+
+    def test_default_target_fps(self):
+        cfg = VegasModeConfig()
+        assert cfg.target_fps == 125
+
+    def test_default_plugin_order_empty(self):
+        cfg = VegasModeConfig()
+        assert cfg.plugin_order == []
+
+    def test_default_excluded_plugins_empty(self):
+        cfg = VegasModeConfig()
+        assert len(cfg.excluded_plugins) == 0
+
+
+# ---------------------------------------------------------------------------
+# from_config
+# ---------------------------------------------------------------------------
+
+class TestFromConfig:
+    def _cfg(self, **kwargs) -> dict:
+        return {"display": {"vegas_scroll": kwargs}}
+
+    def test_enabled_flag(self):
+        cfg = VegasModeConfig.from_config(self._cfg(enabled=True))
+        assert cfg.enabled is True
+
+    def test_scroll_speed(self):
+        cfg = VegasModeConfig.from_config(self._cfg(scroll_speed=80.0))
+        assert cfg.scroll_speed == 80.0
+
+    def test_separator_width(self):
+        cfg = VegasModeConfig.from_config(self._cfg(separator_width=16))
+        assert cfg.separator_width == 16
+
+    def test_plugin_order(self):
+        cfg = VegasModeConfig.from_config(self._cfg(plugin_order=["a", "b", "c"]))
+        assert cfg.plugin_order == ["a", "b", "c"]
+
+    def test_excluded_plugins(self):
+        cfg = VegasModeConfig.from_config(self._cfg(excluded_plugins=["x", "y"]))
+        assert "x" in cfg.excluded_plugins
+        assert "y" in cfg.excluded_plugins
+
+    def test_target_fps(self):
+        cfg = VegasModeConfig.from_config(self._cfg(target_fps=60))
+        assert cfg.target_fps == 60
+
+    def test_buffer_ahead(self):
+        cfg = VegasModeConfig.from_config(self._cfg(buffer_ahead=3))
+        assert cfg.buffer_ahead == 3
+
+    def test_min_max_cycle_duration(self):
+        cfg = VegasModeConfig.from_config(self._cfg(min_cycle_duration=30, max_cycle_duration=120))
+        assert cfg.min_cycle_duration == 30
+        assert cfg.max_cycle_duration == 120
+
+    def test_defaults_when_missing(self):
+        cfg = VegasModeConfig.from_config({})
+        assert cfg.enabled is False
+        assert cfg.scroll_speed == 50.0
+
+    def test_frame_based_scrolling(self):
+        cfg = VegasModeConfig.from_config(self._cfg(frame_based_scrolling=False))
+        assert cfg.frame_based_scrolling is False
+
+
+# ---------------------------------------------------------------------------
+# to_dict
+# ---------------------------------------------------------------------------
+
+class TestToDict:
+    def test_roundtrip(self):
+        original = VegasModeConfig(
+            enabled=True,
+            scroll_speed=75.0,
+            separator_width=24,
+            plugin_order=["a", "b"],
+            excluded_plugins={"z"},
+            target_fps=100,
+        )
+        d = original.to_dict()
+        assert d["enabled"] is True
+        assert d["scroll_speed"] == 75.0
+        assert d["separator_width"] == 24
+        assert d["plugin_order"] == ["a", "b"]
+        assert "z" in d["excluded_plugins"]
+        assert d["target_fps"] == 100
+
+    def test_excluded_plugins_is_list(self):
+        cfg = VegasModeConfig(excluded_plugins={"x"})
+        d = cfg.to_dict()
+        assert isinstance(d["excluded_plugins"], list)
+
+    def test_all_keys_present(self):
+        d = VegasModeConfig().to_dict()
+        for key in ("enabled", "scroll_speed", "separator_width", "plugin_order",
+                    "excluded_plugins", "target_fps", "buffer_ahead",
+                    "frame_based_scrolling", "scroll_delay",
+                    "dynamic_duration_enabled", "min_cycle_duration", "max_cycle_duration"):
+            assert key in d
+
+
+# ---------------------------------------------------------------------------
+# get_frame_interval
+# ---------------------------------------------------------------------------
+
+class TestGetFrameInterval:
+    def test_125fps(self):
+        cfg = VegasModeConfig(target_fps=125)
+        assert abs(cfg.get_frame_interval() - 1.0 / 125) < 1e-9
+
+    def test_60fps(self):
+        cfg = VegasModeConfig(target_fps=60)
+        assert abs(cfg.get_frame_interval() - 1.0 / 60) < 1e-6
+
+    def test_zero_fps_guarded(self):
+        cfg = VegasModeConfig(target_fps=0)
+        # Should not raise ZeroDivisionError (max(1, fps) guard)
+        result = cfg.get_frame_interval()
+        assert result == 1.0
+
+
+# ---------------------------------------------------------------------------
+# is_plugin_included
+# ---------------------------------------------------------------------------
+
+class TestIsPluginIncluded:
+    def test_not_excluded_is_included(self):
+        cfg = VegasModeConfig(excluded_plugins={"bad_plugin"})
+        assert cfg.is_plugin_included("good_plugin") is True
+
+    def test_excluded_plugin_not_included(self):
+        cfg = VegasModeConfig(excluded_plugins={"bad_plugin"})
+        assert cfg.is_plugin_included("bad_plugin") is False
+
+    def test_empty_exclusions_all_included(self):
+        cfg = VegasModeConfig()
+        assert cfg.is_plugin_included("anything") is True
+
+
+# ---------------------------------------------------------------------------
+# get_ordered_plugins
+# ---------------------------------------------------------------------------
+
+class TestGetOrderedPlugins:
+    def test_natural_order_when_no_order_configured(self):
+        cfg = VegasModeConfig()
+        available = ["a", "b", "c"]
+        result = cfg.get_ordered_plugins(available)
+        assert result == ["a", "b", "c"]
+
+    def test_explicit_order_followed(self):
+        cfg = VegasModeConfig(plugin_order=["c", "a", "b"])
+        available = ["a", "b", "c"]
+        result = cfg.get_ordered_plugins(available)
+        assert result == ["c", "a", "b"]
+
+    def test_unavailable_plugins_skipped(self):
+        cfg = VegasModeConfig(plugin_order=["c", "x", "a"])
+        available = ["a", "b", "c"]
+        result = cfg.get_ordered_plugins(available)
+        assert "x" not in result
+        assert result[:2] == ["c", "a"]
+
+    def test_excluded_plugins_removed(self):
+        cfg = VegasModeConfig(excluded_plugins={"b"})
+        available = ["a", "b", "c"]
+        result = cfg.get_ordered_plugins(available)
+        assert "b" not in result
+
+    def test_unordered_available_appended(self):
+        cfg = VegasModeConfig(plugin_order=["a"])
+        available = ["a", "b", "c"]
+        result = cfg.get_ordered_plugins(available)
+        assert result[0] == "a"
+        assert "b" in result
+        assert "c" in result
+
+    def test_empty_available(self):
+        cfg = VegasModeConfig(plugin_order=["a"])
+        result = cfg.get_ordered_plugins([])
+        assert result == []
+
+
+# ---------------------------------------------------------------------------
+# validate
+# ---------------------------------------------------------------------------
+
+class TestValidate:
+    def test_valid_config_no_errors(self):
+        cfg = VegasModeConfig()
+        errors = cfg.validate()
+        assert errors == []
+
+    def test_scroll_speed_too_low(self):
+        cfg = VegasModeConfig(scroll_speed=0.5)
+        errors = cfg.validate()
+        assert any("scroll_speed" in e for e in errors)
+
+    def test_scroll_speed_too_high(self):
+        cfg = VegasModeConfig(scroll_speed=300.0)
+        errors = cfg.validate()
+        assert any("scroll_speed" in e for e in errors)
+
+    def test_separator_width_negative(self):
+        cfg = VegasModeConfig(separator_width=-1)
+        errors = cfg.validate()
+        assert any("separator_width" in e for e in errors)
+
+    def test_separator_width_too_large(self):
+        cfg = VegasModeConfig(separator_width=200)
+        errors = cfg.validate()
+        assert any("separator_width" in e for e in errors)
+
+    def test_target_fps_too_low(self):
+        cfg = VegasModeConfig(target_fps=10)
+        errors = cfg.validate()
+        assert any("target_fps" in e for e in errors)
+
+    def test_target_fps_too_high(self):
+        cfg = VegasModeConfig(target_fps=300)
+        errors = cfg.validate()
+        assert any("target_fps" in e for e in errors)
+
+    def test_buffer_ahead_too_low(self):
+        cfg = VegasModeConfig(buffer_ahead=0)
+        errors = cfg.validate()
+        assert any("buffer_ahead" in e for e in errors)
+
+    def test_buffer_ahead_too_high(self):
+        cfg = VegasModeConfig(buffer_ahead=10)
+        errors = cfg.validate()
+        assert any("buffer_ahead" in e for e in errors)
+
+    def test_multiple_errors_returned(self):
+        cfg = VegasModeConfig(scroll_speed=0.1, target_fps=5)
+        errors = cfg.validate()
+        assert len(errors) >= 2
+
+
+# ---------------------------------------------------------------------------
+# update
+# ---------------------------------------------------------------------------
+
+class TestUpdate:
+    def _wrap(self, **kwargs) -> dict:
+        return {"display": {"vegas_scroll": kwargs}}
+
+    def test_update_enabled(self):
+        cfg = VegasModeConfig(enabled=False)
+        cfg.update(self._wrap(enabled=True))
+        assert cfg.enabled is True
+
+    def test_update_scroll_speed(self):
+        cfg = VegasModeConfig(scroll_speed=50.0)
+        cfg.update(self._wrap(scroll_speed=90.0))
+        assert cfg.scroll_speed == 90.0
+
+    def test_update_separator_width(self):
+        cfg = VegasModeConfig(separator_width=32)
+        cfg.update(self._wrap(separator_width=8))
+        assert cfg.separator_width == 8
+
+    def test_update_plugin_order(self):
+        cfg = VegasModeConfig(plugin_order=[])
+        cfg.update(self._wrap(plugin_order=["x", "y"]))
+        assert cfg.plugin_order == ["x", "y"]
+
+    def test_update_excluded_plugins(self):
+        cfg = VegasModeConfig()
+        cfg.update(self._wrap(excluded_plugins=["skip_me"]))
+        assert "skip_me" in cfg.excluded_plugins
+
+    def test_update_ignores_missing_keys(self):
+        cfg = VegasModeConfig(scroll_speed=50.0)
+        cfg.update(self._wrap(target_fps=80))  # only fps, not speed
+        assert cfg.scroll_speed == 50.0
+        assert cfg.target_fps == 80
+
+    def test_empty_update_no_change(self):
+        cfg = VegasModeConfig(scroll_speed=50.0)
+        cfg.update({})
+        assert cfg.scroll_speed == 50.0

web_interface/app.py

@@ -2,8 +2,10 @@ from flask import Flask, request, redirect, url_for, jsonify, Response, send_fro
 import json
 import logging
 import os
+import queue
 import sys
 import subprocess
+import threading
 import time
 from pathlib import Path
 from datetime import datetime, timedelta
@@ -413,13 +415,53 @@ def add_security_headers(response):
     
     return response
 
-# SSE helper function
+class _StreamBroadcaster:
-def sse_response(generator_func):
+    """Fan-out broadcaster: one background generator thread pushes to all SSE clients.
-    """Helper to create SSE responses"""
+
-    def generate():
+    This means N browser tabs share one generator instead of each running their own,
-        for data in generator_func():
+    keeping PIL encodes / subprocess forks constant regardless of how many tabs are open.
-            yield f"data: {json.dumps(data)}\n\n"
+    """
-    return Response(generate(), mimetype='text/event-stream')
+
+    def __init__(self, generator_factory):
+        self._generator_factory = generator_factory
+        self._clients: set = set()
+        self._lock = threading.Lock()
+        self._thread: threading.Thread | None = None
+
+    def subscribe(self) -> queue.Queue:
+        q: queue.Queue = queue.Queue(maxsize=5)
+        with self._lock:
+            self._clients.add(q)
+            if not (self._thread and self._thread.is_alive()):
+                self._thread = threading.Thread(target=self._broadcast, daemon=True)
+                self._thread.start()
+        return q
+
+    def unsubscribe(self, q: queue.Queue) -> None:
+        with self._lock:
+            self._clients.discard(q)
+
+    def _broadcast(self):
+        for data in self._generator_factory():
+            with self._lock:
+                if not self._clients:
+                    # No subscribers — exit so the thread doesn't spin indefinitely.
+                    # subscribe() will restart it when a new client arrives.
+                    break
+                for q in self._clients:
+                    try:
+                        q.put_nowait(data)
+                    except queue.Full:
+                        # Client is reading too slowly; drop the oldest item and
+                        # deliver the latest so the queue never stalls the client.
+                        try:
+                            q.get_nowait()
+                        except queue.Empty:
+                            pass
+                        try:
+                            q.put_nowait(data)
+                        except queue.Full:
+                            pass
 
 # System status generator for SSE
 def system_status_generator():
@@ -596,20 +638,50 @@ def logs_generator():
 
         time.sleep(5)  # Update every 5 seconds (reduced frequency for better performance)
 
+# One broadcaster per stream — shared across all SSE clients
+_stats_broadcaster = _StreamBroadcaster(system_status_generator)
+_display_broadcaster = _StreamBroadcaster(display_preview_generator)
+_logs_broadcaster = _StreamBroadcaster(logs_generator)
+
+
+def _sse_stream(broadcaster: _StreamBroadcaster) -> Response:
+    """Return a streaming SSE response backed by a shared broadcaster."""
+    q = broadcaster.subscribe()
+
+    def generate():
+        try:
+            while True:
+                try:
+                    data = q.get(timeout=30)
+                    yield f"data: {json.dumps(data)}\n\n"
+                except queue.Empty:
+                    # Send an SSE comment heartbeat to keep the connection alive
+                    # through proxies that close idle connections.
+                    yield ": heartbeat\n\n"
+        except GeneratorExit:
+            pass
+        finally:
+            broadcaster.unsubscribe(q)
+
+    return Response(generate(), mimetype='text/event-stream')
+
+
 # SSE endpoints
 @app.route('/api/v3/stream/stats')
 def stream_stats():
-    return sse_response(system_status_generator)
+    return _sse_stream(_stats_broadcaster)
 
 @app.route('/api/v3/stream/display')
 def stream_display():
-    return sse_response(display_preview_generator)
+    return _sse_stream(_display_broadcaster)
 
 @app.route('/api/v3/stream/logs')
 def stream_logs():
-    return sse_response(logs_generator)
+    return _sse_stream(_logs_broadcaster)
 
-# Exempt SSE streams from CSRF and add rate limiting
+# Exempt SSE streams from CSRF and apply a generous rate limit.
+# SSE connections are long-lived HTTP requests, not repeated API calls, so the
+# tight "20 per minute" default would be exhausted quickly on reconnects.
 if csrf:
     csrf.exempt(stream_stats)
     csrf.exempt(stream_display)
@@ -617,9 +689,9 @@ if csrf:
     # Note: api_v3 blueprint is exempted above after registration
 
 if limiter:
-    limiter.limit("20 per minute")(stream_stats)
+    limiter.limit("200 per minute")(stream_stats)
-    limiter.limit("20 per minute")(stream_display)
+    limiter.limit("200 per minute")(stream_display)
-    limiter.limit("20 per minute")(stream_logs)
+    limiter.limit("200 per minute")(stream_logs)
 
 # Main route - redirect to v3 interface as default
 @app.route('/')

web_interface/static/v3/app.js

@@ -1,4 +1,4 @@
-/* global showNotification, updateSystemStats, htmx */
+/* global showNotification, updateSystemStats, updateDisplayPreview, htmx */
 // LED Matrix v3 JavaScript
 // Additional helpers for HTMX and Alpine.js integration
 
@@ -51,7 +51,8 @@ document.body.addEventListener('htmx:afterRequest', function(event) {
     }
 });
 
-// SSE reconnection helper
+// SSE reconnection helper — closes and reopens both SSE streams,
+// reattaching the open/error handlers defined in base.html.
 window.reconnectSSE = function() {
     if (window.statsSource) {
         window.statsSource.close();
@@ -60,14 +61,18 @@ window.reconnectSSE = function() {
             const data = JSON.parse(event.data);
             if (typeof updateSystemStats === 'function') updateSystemStats(data);
         };
+        if (window._statsOpenHandler) window.statsSource.addEventListener('open', window._statsOpenHandler);
+        if (window._statsErrorHandler) window.statsSource.addEventListener('error', window._statsErrorHandler);
     }
 
     if (window.displaySource) {
         window.displaySource.close();
         window.displaySource = new EventSource('/api/v3/stream/display');
-        window.displaySource.onmessage = function() {
+        window.displaySource.onmessage = function(event) {
-            // Handle display updates
+            const data = JSON.parse(event.data);
+            if (typeof updateDisplayPreview === 'function') updateDisplayPreview(data);
         };
+        if (window._displayErrorHandler) window.displaySource.addEventListener('error', window._displayErrorHandler);
     }
 };
 

web_interface/templates/v3/base.html

@@ -1370,34 +1370,64 @@
 
     <!-- SSE connection for real-time updates -->
     <script>
-        // Connect to SSE streams
+        // Assign to window so reconnectSSE() in app.js can reach them.
-        const statsSource = new EventSource('/api/v3/stream/stats');
+        window.statsSource = new EventSource('/api/v3/stream/stats');
-        const displaySource = new EventSource('/api/v3/stream/display');
+        window.displaySource = new EventSource('/api/v3/stream/display');
 
-        statsSource.onmessage = function(event) {
+        window.statsSource.onmessage = function(event) {
             const data = JSON.parse(event.data);
             updateSystemStats(data);
         };
 
-        displaySource.onmessage = function(event) {
+        window.displaySource.onmessage = function(event) {
             const data = JSON.parse(event.data);
             updateDisplayPreview(data);
         };
 
-        // Connection status
+        function _setConnectionStatus(connected, reconnecting) {
-        statsSource.addEventListener('open', function() {
+            const el = document.getElementById('connection-status');
-            document.getElementById('connection-status').innerHTML = `
+            if (!el) return;
-                <div class="w-2 h-2 bg-green-500 rounded-full"></div>
+            if (connected) {
-                <span class="text-gray-600">Connected</span>
+                el.innerHTML = `
-            `;
+                    <div class="w-2 h-2 bg-green-500 rounded-full"></div>
-        });
+                    <span class="text-gray-600">Connected</span>
+                `;
+            } else if (reconnecting) {
+                el.innerHTML = `
+                    <div class="w-2 h-2 bg-yellow-500 rounded-full animate-pulse"></div>
+                    <span class="text-gray-600">Reconnecting…</span>
+                `;
+            } else {
+                el.innerHTML = `
+                    <div class="w-2 h-2 bg-red-500 rounded-full"></div>
+                    <span class="text-gray-600" title="Connection lost — try refreshing the page">Disconnected</span>
+                `;
+            }
+        }
 
-        statsSource.addEventListener('error', function() {
+        var _statsErrorCount = 0;
-            document.getElementById('connection-status').innerHTML = `
+
-                <div class="w-2 h-2 bg-red-500 rounded-full"></div>
+        // Named on window so reconnectSSE() in app.js can reattach them after
-                <span class="text-gray-600">Disconnected</span>
+        // replacing the EventSource instances.
-            `;
+        window._statsOpenHandler = function() {
-        });
+            _statsErrorCount = 0;
+            _setConnectionStatus(true, false);
+        };
+        window._statsErrorHandler = function() {
+            _statsErrorCount++;
+            // EventSource readyState 0 = CONNECTING (auto-retrying), 2 = CLOSED
+            var reconnecting = window.statsSource.readyState === EventSource.CONNECTING;
+            _setConnectionStatus(false, reconnecting && _statsErrorCount <= 3);
+        };
+        window._displayErrorHandler = function() {
+            // Display stream errors don't change the status badge but log to console
+            // so failures aren't completely silent.
+            console.warn('LEDMatrix: display preview stream error (readyState=' + window.displaySource.readyState + ')');
+        };
+
+        window.statsSource.addEventListener('open', window._statsOpenHandler);
+        window.statsSource.addEventListener('error', window._statsErrorHandler);
+        window.displaySource.addEventListener('error', window._displayErrorHandler);
 
         function updateSystemStats(data) {
             // Update CPU in header