fix planner toggle active state, improve space defaults

- Toggle buttons (Indoor/Outdoor, Rent/Buy) now visually update
  their active state on click
- Space requirement sliders start from minimum court size
  (200m² double, 120m² single) instead of 0
- Defaults updated to court + 2m buffer (336/240/312/216 m²)
- Reference dimensions panel shows standard court sizes
- Chart.js font updated from JetBrains Mono to Commit Mono

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

padelnomics/tests/test_calculator.py

@@ -179,7 +179,7 @@ class TestCalcDefaultScenario:
 
     def test_sqm_is_hall(self, d):
         # Indoor venue → sqm is hallSqm
-        expected = 4 * 330 + 2 * 220 + 200 + 6 * 20
+        expected = 4 * 336 + 2 * 240 + 200 + 6 * 20
         assert d["hallSqm"] == expected
         assert d["sqm"] == expected
 
@@ -377,7 +377,7 @@ class TestCalcOutdoorRent:
         return calc(default_state(venue="outdoor", own="rent"))
 
     def test_sqm_is_outdoor_land(self, d):
-        expected = 4 * 300 + 2 * 200 + 100
+        expected = 4 * 312 + 2 * 216 + 100
         assert d["outdoorLandSqm"] == expected
         assert d["sqm"] == expected
 
@@ -764,8 +764,8 @@ class TestCalcRegression:
         assert d["totalCourts"] == 6
 
     def test_hall_sqm(self, d):
-        # 4*330 + 2*220 + 200 + 6*20 = 2080
-        assert d["hallSqm"] == 2080
+        # 4*336 + 2*240 + 200 + 6*20 = 2144
+        assert d["hallSqm"] == 2144
 
     def test_opex_value(self, d):
         # Rent + Insurance + Electricity + Heating + Water + Maintenance +