feat(Q3): wildlife journal blueprint with API routes and template

Add wildlife_bp with sightings, stats, frequency, and CSV export
endpoints; Bootstrap 5 dark journal template with live-updating
summary cards, species bars, time-of-day frequency chart, and
paginated/filterable sightings table.

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

tests/unit/test_wildlife_api.py

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+import pytest
+from vigilar.config import VigilarConfig
+from vigilar.storage.queries import insert_wildlife_sighting
+from vigilar.web.app import create_app
+
+@pytest.fixture
+def wildlife_app(test_db):
+    cfg = VigilarConfig()
+    app = create_app(cfg)
+    app.config["TESTING"] = True
+    app.config["DB_ENGINE"] = test_db
+    for i in range(3):
+        insert_wildlife_sighting(test_db, species="deer", threat_level="PASSIVE",
+            camera_id="front", confidence=0.9)
+    insert_wildlife_sighting(test_db, species="bear", threat_level="PREDATOR",
+        camera_id="back", confidence=0.95)
+    return app
+
+def test_wildlife_sightings_api(wildlife_app):
+    with wildlife_app.test_client() as c:
+        rv = c.get("/wildlife/api/sightings")
+        assert rv.status_code == 200
+        assert len(rv.get_json()["sightings"]) == 4
+
+def test_wildlife_sightings_filter_species(wildlife_app):
+    with wildlife_app.test_client() as c:
+        rv = c.get("/wildlife/api/sightings?species=bear")
+        assert len(rv.get_json()["sightings"]) == 1
+
+def test_wildlife_stats_api(wildlife_app):
+    with wildlife_app.test_client() as c:
+        rv = c.get("/wildlife/api/stats")
+        data = rv.get_json()
+        assert data["total"] == 4
+        assert data["per_species"]["deer"] == 3
+
+def test_wildlife_frequency_api(wildlife_app):
+    with wildlife_app.test_client() as c:
+        rv = c.get("/wildlife/api/frequency")
+        assert rv.status_code == 200
+        assert len(rv.get_json()) == 6
+
+def test_wildlife_export_csv(wildlife_app):
+    with wildlife_app.test_client() as c:
+        rv = c.get("/wildlife/api/export")
+        assert rv.status_code == 200
+        assert "text/csv" in rv.content_type
+        lines = rv.data.decode().strip().split("\n")
+        assert len(lines) == 5  # header + 4 rows