Polish Data Map mobile layout

backend/tests/test_sprint74_data_map_mobile_polish.py

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+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def test_data_and_map_mobile_polish_css_contracts() -> None:
+    css = (ROOT / "frontend" / "src" / "styles" / "app.css").read_text(encoding="utf-8")
+
+    assert ".file-input-label input[type='file']" in css
+    assert ".dataset-upload-form label" in css
+    assert ".dataset-action-grid" in css
+    assert ".dataset-action-button" in css
+    assert ".map-toolbar" in css
+    assert ".layer-control-card input[type='range']" in css
+    assert ".map-empty-action-grid" in css
+    assert ".map-empty-action-grid button" in css
+    assert "minmax(7.25rem, 1fr)" in css
+    assert "touch-action: pan-x;" in css
+
+
+def test_data_and_map_components_keep_existing_workflow_markup() -> None:
+    dataset_panel = (ROOT / "frontend" / "src" / "components" / "datasets" / "DatasetPanel.tsx").read_text(
+        encoding="utf-8"
+    )
+    map_workspace = (ROOT / "frontend" / "src" / "components" / "map" / "MapWorkspace.tsx").read_text(
+        encoding="utf-8"
+    )
+
+    assert 'className="dataset-upload-form"' in dataset_panel
+    assert 'className="file-input-label"' in dataset_panel
+    assert "dataset-action-grid" in dataset_panel
+    assert "dataset-action-button" in dataset_panel
+    assert "map-toolbar" in map_workspace
+    assert "layer-control-card" in map_workspace
+    assert "map-empty-action-grid" in map_workspace