feat: inject bundled mpv plugin for managed launches, remove legacy glob (#62)

* feat: inject bundled mpv plugin for managed launches, remove legacy glob

- SubMiner-managed launcher and Windows shortcut launches inject the bundled plugin when no global plugin is detected
- First-run setup detects and removes legacy global plugin files via OS trash before managed playback starts
- Makefile `install-plugin` target and Windows config-rewrite script removed; Linux/macOS install now copies plugin to app data dir
- AniList stats search and post-watch tracking now go through the shared rate limiter
- Stats cover-art lookup reuses cached AniList data before issuing a new request
- Closing mpv in a launcher-managed session now terminates the background Electron app

* harden bootstrap version load and clean plugin on uninstall

- Use pcall for version.lua in bootstrap.lua so missing version module does not crash plugin startup
- Remove plugin/subminer from app-data dirs in uninstall-linux and uninstall-macos targets
- Add Lua compat test asserting bootstrap uses defensive pcall for version load
- Add release-workflow test asserting uninstall targets clean bundled plugin dirs
- Delete completed planning document

scripts/test-plugin-lua-compat.lua

@@ -1,6 +1,8 @@
 local MODULE_PATHS = {
+	"plugin/subminer/bootstrap.lua",
 	"plugin/subminer/hover.lua",
 	"plugin/subminer/environment.lua",
+	"plugin/subminer/version.lua",
 }
 
 local LEGACY_PARSER_CANDIDATES = {
@@ -48,6 +50,12 @@ local function assert_loadfile_ok(path)
 	assert_true(chunk ~= nil, "loadfile failed for " .. path .. ": " .. tostring(err))
 end
 
+local function assert_bootstrap_uses_defensive_version_load()
+	local source = read_file("plugin/subminer/bootstrap.lua")
+	assert_true(not source:find('require%("version"%)'), "bootstrap.lua must not hard-require version.lua")
+	assert_true(source:find('pcall%(require, "version"%)') ~= nil, "bootstrap.lua must load version.lua with pcall")
+end
+
 local function normalize_execute_result(ok, why, code)
 	if type(ok) == "number" then
 		return ok == 0, ok
@@ -128,6 +136,7 @@ for _, path in ipairs(MODULE_PATHS) do
 	assert_no_legacy_incompatible_continue(path)
 	assert_loadfile_ok(path)
 end
+assert_bootstrap_uses_defensive_version_load()
 
 local parser = find_legacy_parser()
 if parser then