feat(config): unify mpv plugin options under main config and add CSS/Ani

- Replace subminer.conf plugin config with mpv.* fields in config.jsonc
- Add socketPath, backend, autoStartSubMiner, pauseUntilOverlayReady, aniskipEnabled/buttonKey, subminerBinaryPath to mpv config
- Add subtitleSidebar.css field; migrate legacy sidebar appearance fields
- Add paintOrder and WebkitTextStroke to subtitle style options
- Update default subtitle/sidebar fontFamily to CJK-first stack
- Fix overlay visible state surviving mpv y-r restart
- Fix live config saves applying subtitle CSS immediately to open overlays
- Migrate legacy primary/secondary subtitle appearance into subtitleStyle.css on load
- Switch AniSkip button key setting to click-to-learn key capture

plugin/subminer/options.lua

@@ -27,16 +27,16 @@ function M.load(options_lib, default_socket_path)
 	local opts = {
 		binary_path = "",
 		socket_path = default_socket_path,
-		texthooker_enabled = true,
+		texthooker_enabled = false,
 		texthooker_port = 5174,
 		backend = "auto",
-		auto_start = true,
-		auto_start_visible_overlay = true,
+		auto_start = false,
+		auto_start_visible_overlay = false,
 		auto_start_pause_until_ready = true,
 		auto_start_pause_until_ready_timeout_seconds = 15,
 		osd_messages = true,
 		log_level = "info",
-		aniskip_enabled = true,
+		aniskip_enabled = false,
 		aniskip_title = "",
 		aniskip_season = "",
 		aniskip_mal_id = "",