Migrate from Deno/JSR to npm publishing

- @sveltejs/package builds dist/ for @eeeooolll/graphiql with three entry
  points (./, ./component, ./splitter)
- Vitest + svelte-check replace Deno test/check; runes shim no longer
  needed since the Svelte plugin compiles .svelte.ts at runtime
- Drop $app/environment dep in Editor.svelte to support non-SvelteKit
  consumers
- Refactor TabBar tab element from nested <button> to role=tab <div> per
  PLAN.md gotcha; svelte-check flagged the invalid HTML
- README now documents npm install, integration patterns for Yoga,
  Apollo, graphql-modules, Hono/Bun/Deno, plus APQ + keyboard table

1 files changed, 60 insertions, 19 deletions

diff --git a/tests/storage.test.ts b/tests/storage.test.ts
index 7d6ba73..434a67d 100644
--- a/tests/storage.test.ts
+++ b/tests/storage.test.ts
@@ -1,9 +1,10 @@
 
 
 
+
 /*** IMPORT ------------------------------------------- ***/
 
-import { assertEquals } from "jsr:@std/assert@^1.0.0";
+import { beforeAll, expect, test } from "vitest";
 
 /*** UTILITY ------------------------------------------ ***/
 
@@ -12,34 +13,74 @@ import {
   createMemoryStorage
 } from "../source/library/state/storage.ts";
 
+/*** HELPERS ------------------------------------------ ***/
+
+function installLocalStorage(): void {
+  if (typeof globalThis.localStorage !== "undefined")
+    return;
+
+  const store = new Map<string, string>();
+
+  const shim: Storage = {
+    clear(): void {
+      store.clear();
+    },
+    getItem(key: string): string | null {
+      return store.has(key) ? store.get(key) ?? null : null;
+    },
+    key(index: number): string | null {
+      return Array.from(store.keys())[index] ?? null;
+    },
+    get length(): number {
+      return store.size;
+    },
+    removeItem(key: string): void {
+      store.delete(key);
+    },
+    setItem(key: string, value: string): void {
+      store.set(key, String(value));
+    }
+  };
+
+  Object.defineProperty(globalThis, "localStorage", {
+    configurable: true,
+    value: shim,
+    writable: true
+  });
+}
+
+beforeAll(() => {
+  installLocalStorage();
+});
+
 /*** TESTS -------------------------------------------- ***/
 
-Deno.test("memory storage round-trips objects", () => {
+test("memory storage round-trips objects", () => {
   const storage = createMemoryStorage();
   storage.set("k", { hello: "world" });
-  assertEquals(storage.get<{ hello: string }>("k"), { hello: "world" });
+  expect(storage.get<{ hello: string }>("k")).toEqual({ hello: "world" });
 });
 
-Deno.test("memory storage returns null for missing keys", () => {
+test("memory storage returns null for missing keys", () => {
   const storage = createMemoryStorage();
-  assertEquals(storage.get("missing"), null);
+  expect(storage.get("missing")).toEqual(null);
 });
 
-Deno.test("memory storage remove clears a key", () => {
+test("memory storage remove clears a key", () => {
   const storage = createMemoryStorage();
   storage.set("k", 42);
   storage.remove("k");
-  assertEquals(storage.get("k"), null);
+  expect(storage.get("k")).toEqual(null);
 });
 
-Deno.test("memory storage instances are isolated", () => {
+test("memory storage instances are isolated", () => {
   const a = createMemoryStorage();
   const b = createMemoryStorage();
   a.set("shared", 1);
-  assertEquals(b.get("shared"), null);
+  expect(b.get("shared")).toEqual(null);
 });
 
-Deno.test("local storage namespaces keys", () => {
+test("local storage namespaces keys", () => {
   globalThis.localStorage.clear();
 
   const alpha = createLocalStorage("alpha");
@@ -48,15 +89,15 @@ Deno.test("local storage namespaces keys", () => {
   alpha.set("shared", { tag: "a" });
   beta.set("shared", { tag: "b" });
 
-  assertEquals(alpha.get<{ tag: string }>("shared"), { tag: "a" });
-  assertEquals(beta.get<{ tag: string }>("shared"), { tag: "b" });
-  assertEquals(globalThis.localStorage.getItem("alpha:shared"), JSON.stringify({ tag: "a" }));
-  assertEquals(globalThis.localStorage.getItem("beta:shared"), JSON.stringify({ tag: "b" }));
+  expect(alpha.get<{ tag: string }>("shared")).toEqual({ tag: "a" });
+  expect(beta.get<{ tag: string }>("shared")).toEqual({ tag: "b" });
+  expect(globalThis.localStorage.getItem("alpha:shared")).toEqual(JSON.stringify({ tag: "a" }));
+  expect(globalThis.localStorage.getItem("beta:shared")).toEqual(JSON.stringify({ tag: "b" }));
 
   globalThis.localStorage.clear();
 });
 
-Deno.test("local storage remove respects the namespace", () => {
+test("local storage remove respects the namespace", () => {
   globalThis.localStorage.clear();
 
   const alpha = createLocalStorage("alpha");
@@ -66,18 +107,18 @@ Deno.test("local storage remove respects the namespace", () => {
   beta.set("k", 2);
 
   alpha.remove("k");
-  assertEquals(alpha.get("k"), null);
-  assertEquals(beta.get<number>("k"), 2);
+  expect(alpha.get("k")).toEqual(null);
+  expect(beta.get<number>("k")).toEqual(2);
 
   globalThis.localStorage.clear();
 });
 
-Deno.test("local storage returns null on malformed JSON", () => {
+test("local storage returns null on malformed JSON", () => {
   globalThis.localStorage.clear();
   globalThis.localStorage.setItem("alpha:bad", "not-json");
 
   const alpha = createLocalStorage("alpha");
-  assertEquals(alpha.get("bad"), null);
+  expect(alpha.get("bad")).toEqual(null);
 
   globalThis.localStorage.clear();
 });