Align lint fixes with main and resolve merge conflicts

- Convert biome-ignore to oxlint-disable-next-line across client app
- Fix no-base-to-string with type narrowing instead of suppressions
- Fix no-floating-promises with fireAndForget() in proxy app
- Fix restrict-template-expressions with String() wrapping
- Resolve leftover merge conflict markers in manager.rs
- Remove duplicate cmd_plugin_init_errors from lib.rs
- Add graphql as explicit dependency in yaak-client

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/tailwind-config/index.cjs

@@ -125,6 +125,7 @@ module.exports = {
   },
   plugins: [
     require("@tailwindcss/container-queries"),
+    // oxlint-disable-next-line unbound-method -- destructured from plugin API
     plugin(({ addVariant }) => {
       addVariant("hocus", ["&:hover", "&:focus-visible", "&.focus:focus"]);
       addVariant("focus-visible-or-class", ["&:focus-visible", "&.focus:focus"]);