chore: release version 2.3.5 and refactor lobby

Bump export_presets.cfg version to 2.3.5. Update CHANGELOG_DRAFT.md.
Refactor lobby.gd into LobbyChat, LobbyMainMenu, LobbyRoomList, LobbyRoom.
Move Nakama config to environment variables in nakama_manager.gd.
Derive auth_manager.gd encryption key from OS.get_unique_id().sha256_text().
Remove Steam email auth fallback. Require auth ticket.
Make GachaManager.pull() async in gacha_panel.gd.
Remove dummy wallet seeding. Add store_type to IAP payload.
Validate IAP receipts server-side in economy.lua.
Register gacha module in main.lua.
Clean backend_service.gd stubs.
Fix featured_banners type safety in gacha_manager.gd. Guards non-array responses.
Move tiles_armagedon_a1.res to assets/models/meshes/. Fix import fallback_path.

tests/test_deployment_pipeline.gd

@@ -0,0 +1,108 @@
+# tests/test_deployment_pipeline.gd
+# Tests for Task [012]: Implement Multi-Platform Deployment Pipeline
+# Validates deployment configuration, versioning, and platform-specific builds
+
+extends GutTest
+
+var deployment_config: Dictionary
+
+func before_all():
+	gut.p("=== Deployment Pipeline Tests [Task 012] ===")
+
+func before_each():
+	deployment_config = {
+		"version": "2.3.4",
+		"platforms": ["android", "ios", "windows", "macos"],
+		"build_targets": {
+			"android": {"package": "com.tekton.dash", "format": "aab"},
+			"ios": {"package": "com.tekton.dash", "format": "ipa"},
+			"windows": {"package": "tekton-dash", "format": "exe"},
+			"macos": {"package": "tekton-dash", "format": "dmg"}
+		}
+	}
+
+func after_each():
+	pass
+
+# Test 1: Deployment config has all required platforms
+func test_deployment_config_has_all_platforms():
+	var required_platforms = ["android", "ios", "windows", "macos"]
+	var platforms = deployment_config.get("platforms", [])
+	
+	for platform in required_platforms:
+		assert_has(platforms, platform, "Should support %s platform" % platform)
+
+# Test 2: Version format is valid
+func test_version_format_is_valid():
+	var version = deployment_config.get("version", "")
+	var parts = version.split(".")
+	
+	assert_eq(parts.size(), 3, "Version should have 3 parts (major.minor.patch)")
+	for part in parts:
+		assert_true(part.is_valid_int(), "Version part should be numeric")
+
+# Test 3: Build targets configured for each platform
+func test_build_targets_configured():
+	var platforms = deployment_config.get("platforms", [])
+	var targets = deployment_config.get("build_targets", {})
+	
+	for platform in platforms:
+		assert_has(targets, platform, "Build target should exist for %s" % platform)
+
+# Test 4: Android build uses correct format
+func test_android_build_format():
+	var android_target = deployment_config["build_targets"]["android"]
+	assert_eq(android_target["format"], "aab", "Android should use AAB format")
+
+# Test 5: iOS build uses correct format
+func test_ios_build_format():
+	var ios_target = deployment_config["build_targets"]["ios"]
+	assert_eq(ios_target["format"], "ipa", "iOS should use IPA format")
+
+# Test 6: Package names are valid
+func test_package_names_valid():
+	var targets = deployment_config.get("build_targets", {})
+	
+	for platform in targets:
+		var package = targets[platform].get("package", "")
+		assert_true(package.length() > 0, "Package name should not be empty for %s" % platform)
+
+# Test 7: Deployment pipeline can increment version
+func test_version_increment():
+	var current = "2.3.4"
+	var parts = current.split(".")
+	parts[2] = str(int(parts[2]) + 1)
+	var new_version = ".".join(parts)
+	
+	assert_eq(new_version, "2.3.5", "Should increment patch version")
+
+# Test 8: Build artifacts have correct extensions
+func test_build_artifact_extensions():
+	var extensions = {
+		"android": "aab",
+		"ios": "ipa",
+		"windows": "exe",
+		"macos": "dmg"
+	}
+	
+	var targets = deployment_config["build_targets"]
+	for platform in extensions:
+		var format = targets[platform]["format"]
+		assert_eq(format, extensions[platform], "Format mismatch for %s" % platform)
+
+# Test 9: Deployment config is not empty
+func test_deployment_config_not_empty():
+	assert_is_not_empty(deployment_config, "Deployment config should not be empty")
+
+# Test 10: All platforms have unique package names or formats
+func test_platform_uniqueness():
+	var targets = deployment_config["build_targets"]
+	var seen = {}
+	
+	for platform in targets:
+		var key = targets[platform]["package"] + "_" + targets[platform]["format"]
+		assert_false(seen.has(key), "Platform %s has duplicate config" % platform)
+		seen[key] = true
+
+func after_all():
+	gut.p("=== Deployment Pipeline Tests Complete ===")