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, 7 insertions, 6 deletions

diff --git a/web/server_test.go b/web/server_test.go
index 6a1c13f..a60d742 100644
--- a/web/server_test.go
+++ b/web/server_test.go
@@ -15,6 +15,7 @@ import (
 	"time"
 
 	"github.com/jftuga/geodist"
+	"github.com/martinlehoux/biking_home/climb"
 	"github.com/martinlehoux/biking_home/config"
 	"github.com/martinlehoux/biking_home/internal/dbtest"
 	"github.com/martinlehoux/biking_home/internal/ridetest"
@@ -225,8 +226,8 @@ func TestBuildRideProfileIncludesOfficialClimbMatch(t *testing.T) {
 	profile := buildRideProfile(parsed, nil, []official_climb.OfficialClimb{{
 		ID:         42,
 		Name:       "Col de Test",
-		StartCoord: parsed.Coords()[0],
-		EndCoord:   parsed.Coords()[1],
+		StartCoord: parsed.Coords[0],
+		EndCoord:   parsed.Coords[1],
 	}}, official_climb.DefaultMatchPolicy())
 
 	require.Len(t, profile.Climbs, 1)
@@ -242,8 +243,8 @@ func TestBuildRideProfileUsesOfficialClimbBoundaries(t *testing.T) {
 	profile := buildRideProfile(parsed, nil, []official_climb.OfficialClimb{{
 		ID:         42,
 		Name:       "Col de Test",
-		StartCoord: parsed.Coords()[0],
-		EndCoord:   parsed.Coords()[2],
+		StartCoord: parsed.Coords[0],
+		EndCoord:   parsed.Coords[2],
 	}}, official_climb.DefaultMatchPolicy())
 
 	require.Len(t, profile.Climbs, 1)
@@ -370,7 +371,7 @@ func TestHandlerRendersAnalyticsChart(t *testing.T) {
 		SET cotacol_score = CASE external_id WHEN ? THEN 20 ELSE 120 END,
 			cotacol_algo_version = ?,
 			average_speed_mps = CASE external_id WHEN ? THEN 7.0 ELSE 4.0 END
-	`, first.ExternalID, ride.CotacolAlgorithmVersion, second.ExternalID)
+	`, first.ExternalID, climb.CotacolAlgorithmVersion, second.ExternalID)
 	require.NoError(t, err)
 
 	req := httptest.NewRequest(http.MethodGet, "/analytics", nil)
@@ -416,7 +417,7 @@ func TestHandlerFiltersAnalyticsByDistance(t *testing.T) {
 		SET cotacol_score = CASE external_id WHEN ? THEN 20 ELSE 120 END,
 			cotacol_algo_version = ?,
 			average_speed_mps = CASE external_id WHEN ? THEN 7.0 ELSE 5.0 END
-	`, short.ExternalID, ride.CotacolAlgorithmVersion, long.ExternalID)
+	`, short.ExternalID, climb.CotacolAlgorithmVersion, long.ExternalID)
 	require.NoError(t, err)
 
 	req := httptest.NewRequest(http.MethodGet, "/analytics?distance_min=60", nil)