Remove synchronous Env.get/Env.all calls in provider, tool registry,
and model-cache modules, replacing them with effect-yielded env
lookups or direct process.env reads where appropriate. Thread resolved
env through patchCustomLoaderResult and kiloCustomLoaders dependency
type. Drop unused paste-summary import from prompt component, fix
createResource action call in session list dialog, add bell toggle KV
signal, and rewrite config-gitignore test to use proper Effect layers
instead of mocked AppRuntime. Update remaining import paths and test
module mocks to align with barrel re-exports.