docs: refine homepage copy and changelog

docs: improve README navigation and compatibility guidance

docs: clarify recommended firmware range and support expectations

fix: avoid stale global URL leaking into OpenClash package download

refactor: reduce OpenClash install side effects and soften GitHub API failures

fix: detect installed opkg packages via list-installed

fix: fail uninstall when main packages remain installed

fix: add cache-busting query when downloading child scripts

fix: keep direct ipk path output clean for opkg install

refactor: install PassWall packages from direct ipk downloads

fix: try curl and wget for PassWall key download

fix: add fallback sources for PassWall pubkey download

refactor: slim plugin install flows toward official behavior

chore: simplify uninstall menu labels

refactor: remove full uninstall flow