v0.15.0

Added

• ExUnit-native JavaScript and TypeScript tests through Volt.Test.ExUnit.install/1; mix test remains the single test entry point.
• volt:test runtime with describe, test/it, skip/todo modifiers, hooks, async tests, test.each, describe.each, and common expect matchers.
• Browser JavaScript tests with browser: true through PlaywrightEx.
• Strict JSONCodec result contracts for JavaScript test metadata, failures, and file results.
• OXC-backed source line discovery for registered JavaScript tests.
• JavaScript/TypeScript test fixture sigils in Volt.Test.Sigils.
• Phoenix example app tests that showcase Volt's Vitest-like test API.
• Browser dogfood coverage for Volt client overlay, preload, hot-context, and style-update runtime helpers.

Changed

• Organized Volt TypeScript runtime and declaration files by purpose under priv/ts and priv/types.
• Split Volt test runtime TypeScript into focused modules.
• Split large builder and dev-server test files into feature-focused test modules.
• Mutable/generated test fixtures now use temporary directories instead of persistent fixture roots.
• Type-aware JavaScript checks keep Oxlint-shaped :rules config while avoiding unsupported tsgolint rules.
• Solid runtime bundling now uses explicit Node builtin shims instead of a global CommonJS require preamble.
• Development HMR client and CSS update support now use shared bundled client modules.

Fixed

• Playwright integration tests can use the local node_modules/.bin/playwright executable.
• Phoenix example integration tests prepare example Mix/npm dependencies before asserting vendor and production build behavior.
• Browser console forwarding now decodes payloads through a strict JSONCodec contract.