Extract climb detection into a dedicated climb package

Move climb detection, slope, and Cotacol scoring out of ride into a new
climb package that operates on a geometry-only Route (distances, elevations,
coords). Ride embeds climb.Route and keeps its timing and telemetry columns.

- climb.Detect returns []DetectedClimb (Climb + ride-absolute Start).
- Climb owns its sliced geometry; indices are local, with Start reported at
  the detection boundary for absolute position.
- Detected bounds use core.Interval; freeRegions claim suppression fixed.
- ride no longer builds slices: ClimbFromDist/ClimbFromIndexes/climbFrom and
  ride.Climb/Interval/Range are removed; rideanalysis, mountain_pass MatchClimb,
  and web views are rewired to climb types.
- New internal/routetest builds climb.Route from the ride DSL; ridetest reuses
  it and adds timestamps and telemetry.
- Tests moved to climb (synthetic detection and difficulty) and kept in ride
  for GPX-example integration; ride.comparison detection coverage retained.
- mountain_pass.nearestCrossing now reuses geo.Nearest.

1 files changed, 24 insertions, 24 deletions

diff --git a/internal/ridetest/ride_test.go b/internal/ridetest/ride_test.go
index 65483f2..46bd632 100644
--- a/internal/ridetest/ride_test.go
+++ b/internal/ridetest/ride_test.go
@@ -12,30 +12,30 @@ func TestRideSingleSection(t *testing.T) {
 	r, err := Ride("1km at 10%")
 	require.NoError(t, err)
 
-	assert.Len(t, r.Distances(), 11)
-	assert.Equal(t, 0.0, r.Distances()[0])
-	assert.Equal(t, 1000.0, r.Distances()[10])
-	assert.Equal(t, 0.0, r.Elevations()[0])
-	assert.Equal(t, 100.0, r.Elevations()[10])
+	assert.Len(t, r.Distances, 11)
+	assert.Equal(t, 0.0, r.Distances[0])
+	assert.Equal(t, 1000.0, r.Distances[10])
+	assert.Equal(t, 0.0, r.Elevations[0])
+	assert.Equal(t, 100.0, r.Elevations[10])
 }
 
 func TestRideSectionsWithDescentAndFlat(t *testing.T) {
 	r, err := Ride("0.5km at 10% | 0.5km at -10%")
 	require.NoError(t, err)
 
-	assert.Len(t, r.Distances(), 11)
-	assert.Equal(t, 1000.0, r.Distances()[10])
-	assert.Equal(t, 50.0, r.Elevations()[5]) // top of the first section
-	assert.Equal(t, 0.0, r.Elevations()[10]) // back to start elevation
+	assert.Len(t, r.Distances, 11)
+	assert.Equal(t, 1000.0, r.Distances[10])
+	assert.Equal(t, 50.0, r.Elevations[5]) // top of the first section
+	assert.Equal(t, 0.0, r.Elevations[10]) // back to start elevation
 }
 
 func TestRideSamplingOption(t *testing.T) {
 	r, err := Ride("1km at 10%", Sampling(50))
 	require.NoError(t, err)
 
-	assert.Len(t, r.Distances(), 21)
-	assert.Equal(t, 1000.0, r.Distances()[20])
-	assert.Equal(t, 5.0, r.Elevations()[1])
+	assert.Len(t, r.Distances, 21)
+	assert.Equal(t, 1000.0, r.Distances[20])
+	assert.Equal(t, 5.0, r.Elevations[1])
 }
 
 func TestRideStartCoordHeading(t *testing.T) {
@@ -44,13 +44,13 @@ func TestRideStartCoordHeading(t *testing.T) {
 
 	// Coordinates advance northeast by 0.01° per km; float64 literals like
 	// 43.11 drift in the last bits, so compare with a small tolerance.
-	require.Len(t, r.Coords(), 3)
-	assert.InDelta(t, 43.10, r.Coords()[0].Lat, 1e-9)
-	assert.InDelta(t, 5.10, r.Coords()[0].Lon, 1e-9)
-	assert.InDelta(t, 43.11, r.Coords()[1].Lat, 1e-9)
-	assert.InDelta(t, 5.11, r.Coords()[1].Lon, 1e-9)
-	assert.InDelta(t, 43.12, r.Coords()[2].Lat, 1e-9)
-	assert.InDelta(t, 5.12, r.Coords()[2].Lon, 1e-9)
+	require.Len(t, r.Coords, 3)
+	assert.InDelta(t, 43.10, r.Coords[0].Lat, 1e-9)
+	assert.InDelta(t, 5.10, r.Coords[0].Lon, 1e-9)
+	assert.InDelta(t, 43.11, r.Coords[1].Lat, 1e-9)
+	assert.InDelta(t, 5.11, r.Coords[1].Lon, 1e-9)
+	assert.InDelta(t, 43.12, r.Coords[2].Lat, 1e-9)
+	assert.InDelta(t, 5.12, r.Coords[2].Lon, 1e-9)
 }
 
 func TestRideHeadingOption(t *testing.T) {
@@ -59,9 +59,9 @@ func TestRideHeadingOption(t *testing.T) {
 
 	// A single kilometer at 0.1°/km ends at (43.1, 5.1), matching rides whose
 	// points are spaced 0.1° apart over a kilometer.
-	require.Len(t, r.Coords(), 2)
-	assert.InDelta(t, 43.1, r.Coords()[1].Lat, 1e-9)
-	assert.InDelta(t, 5.1, r.Coords()[1].Lon, 1e-9)
+	require.Len(t, r.Coords, 2)
+	assert.InDelta(t, 43.1, r.Coords[1].Lat, 1e-9)
+	assert.InDelta(t, 5.1, r.Coords[1].Lon, 1e-9)
 }
 
 func TestRideStartTime(t *testing.T) {
@@ -79,8 +79,8 @@ func TestRideStartElevation(t *testing.T) {
 	r, err := Ride("1km at 0%", StartElevation(100))
 	require.NoError(t, err)
 
-	assert.Equal(t, 100.0, r.Elevations()[0])
-	assert.Equal(t, 100.0, r.Elevations()[10])
+	assert.Equal(t, 100.0, r.Elevations[0])
+	assert.Equal(t, 100.0, r.Elevations[10])
 }
 
 func TestRideMetricsCompleteColumns(t *testing.T) {