Merge develop into feature/50-upload-soundtrack

The API spec is now formatted like before (2-space indents, sorted keys):
develop's spec with the upload paths and types added, so the diff to
develop is only the upload API.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/integration/test_scene_split.gd

@@ -226,7 +226,7 @@ func test_click_on_top_bar_while_quiz_popup_is_open_only_closes_it() -> void:
 
 func test_sync_disables_quiz_buttons_until_finished() -> void:
 	_server.respond_bytes("/sync", PackedByteArray())
-	_server.respond_json("/sync/progress", {"progress": 10, "time_spent": "00:00:01"})
+	_server.respond_json("/sync/progress", {"progress": 10, "time_spent": "00:01"})
 	var sync_popup: BasePopup = _window.get_node("SyncPopup")
 
 	_top_bar_button("SyncButton").pressed.emit()

tests/integration/test_sync_popup.gd

@@ -10,6 +10,8 @@ var _window: Control
 func before_test() -> void:
 	_snapshot = AutoloadSnapshot.take([Settings])
 	Settings.currently_syncing = false
+	# The bar jumps to its values and the result shows at once
+	Settings.reduce_animations = true
 	_server = FakeHttpTransport.new().install()
 	_server.respond_bytes("/sync", PackedByteArray())
 	_runner = scene_runner("res://popups/SyncPopup.tscn")
@@ -38,7 +40,7 @@ func _empty_result() -> Dictionary:
 		"soundtracks_changed_content": [],
 		"soundtracks_removed": [],
 		"catched_errors": [],
-		"total_time": "00:00:03",
+		"total_time": "00:03",
 	}
 
 
@@ -64,12 +66,29 @@ func test_start_sync_does_nothing_while_already_syncing() -> void:
 
 func test_progress_updates_progress_bar() -> void:
 	_runner.invoke("start_sync")
-	_server.respond_json("/sync/progress", {"progress": "42", "time_spent": "00:00:12"})
+	_server.respond_json("/sync/progress", {"progress": "42", "time_spent": "00:12"})
 
 	_runner.invoke("_on_sync_timeout")
 
 	assert_float(_node("SyncProgressBar").value).is_equal(42.0)
-	assert_str(_node("SyncTime").text).is_equal("00:00:12")
+	assert_str(_node("SyncTime").text).is_equal("00:12")
+
+
+func test_finished_sync_fills_the_bar_before_the_result() -> void:
+	Settings.reduce_animations = false
+	_runner.invoke("start_sync")
+	var bar: AnimatedProgressBar = _node("SyncProgressBar")
+	assert_bool(bar.indeterminate).is_true()
+
+	_finish_sync(_empty_result())
+
+	assert_bool(_node("ProgressHBoxContainer").visible).is_true()
+	await await_millis(int(Anim.SLOW * 1000) + 100)
+	assert_float(bar.value).is_equal(100.0)
+	assert_bool(_node("ProgressHBoxContainer").visible).is_true()
+	await await_millis(int(Anim.SLOW * 1000) + 100)
+	assert_bool(_node("ProgressHBoxContainer").visible).is_false()
+	assert_str(_node("SyncTitleLabel").text).is_equal("Sync Result")
 
 
 func test_finished_sync_shows_only_sections_with_changes() -> void:
@@ -88,7 +107,7 @@ func test_finished_sync_shows_only_sections_with_changes() -> void:
 	assert_bool(_node("NoChangesLabel").visible).is_false()
 	# Header plus one label per soundtrack
 	assert_int(_node("SoundtracksAddedVBox").get_child_count()).is_equal(3)
-	assert_str(_node("SyncTime").text).is_equal("Total time: 00:00:03")
+	assert_str(_node("SyncTime").text).is_equal("Total time: 00:03")
 	assert_bool(Settings.currently_syncing).is_false()
 	await assert_signal(_window).is_emitted("sync_finished")
 

tests/integration/test_theme.gd

@@ -48,6 +48,9 @@ const STYLES: Dictionary = {
 	"PlayerTime": "Label",
 	"PlayerIcon": "Button",
 	"UpdateButton": "Button",
+	"SyncProgressBar": "ProgressBar",
+	"SyncProgressBarFill": "Panel",
+	"SyncProgressBarText": "Label",
 	"ProgressSlider": "HSlider",
 	"VolumeBar": "HSlider",
 	"StatisticsCard": "PanelContainer",
@@ -67,6 +70,7 @@ const STYLES: Dictionary = {
 ## Theme types that only scripts read from, so they are not styles a node can pick.
 const CODE_ONLY_TYPES: Dictionary = {
 	"Palette": ["backdrop", "first_point", "match_point", "flash"],
+	"SyncProgressBar": ["shine"],
 	"ScoreGraph": [
 		"player_1", "player_2", "player_3", "player_4", "player_5", "player_6", "player_7",
 		"grid", "axis_text", "winning_line",