feat: bound climb detection by matched official climbs

Detected climbs no longer absorb an official climb's range: official climbs
matched to the route by coordinates claim their stored start/end range, and
climb detection now runs only in the free regions around them. On ride 263 a
single absorbed Cat 2 ascent is split so creating a first-half official climb
lets the second half be detected on its own.

- ride: add Range, freeRegions, and DetectClimbs(claimed); exclude claimed
  ranges so a climb never overlaps one
- official_climb: MatchClimb now bounds-matches purely by coordinates without
  needing a detected climb; extract geo.Nearest shared helper
- rideanalysis: Analyze builds claimed climbs from matched official climbs and
  detects only in free regions; render official vs unmatched climbs separately

1 files changed, 2 insertions, 2 deletions

diff --git a/ride/difficulty_test.go b/ride/difficulty_test.go
index 5773376..05b60f9 100644
--- a/ride/difficulty_test.go
+++ b/ride/difficulty_test.go
@@ -44,7 +44,7 @@ func TestCotacolExampleRide(t *testing.T) {
 
 func TestCotacolClimbNotAtStart(t *testing.T) {
 	r := RideBuilder{precision: 100}.WithSection("1km at 0%").WithSection("2km at 7%").Build()
-	climbs := r.AllClimbs()
+	climbs := r.DetectClimbs(nil)
 	assert.Len(t, climbs, 1)
 	assert.InDelta(t, 98.0, climbs[0].DifficultyScore(), 1e-9)
 }
@@ -78,7 +78,7 @@ func TestCategoryOfBoundaries(t *testing.T) {
 func TestCotacolHautacamClimbfinderReference(t *testing.T) {
 	r, err := ride.ParseFile(parser, "../examples/2022-07-21.Pogacar.gpx")
 	assert.NoError(t, err)
-	climbs := r.AllClimbs()
+	climbs := r.DetectClimbs(nil)
 	assert.Len(t, climbs, 6)
 	hautacam := climbs[5]
 	assert.InDelta(t, 128.6, hautacam.StartDistanceM()/1000, 0.1)