Initial commit: @eol/graphiql v0.3

Svelte 5 GraphiQL alternative for JSR. Covers:
- HTTP fetcher with injectable fetch; SSE/WS stubs
- Session store with tabs, auto-titling, persistence, rename
- Operation detection via graphql parse(); Toolbar picker
- CodeMirror 6 editor via cm6-graphql with theme prop
- Light theme preset (hand-rolled EditorView.theme)
- Doc explorer with breadcrumb nav and type guards
- History panel with 100-entry cap, favorite pinning
- Deno tests for operations, storage, and history eviction

1 files changed, 77 insertions, 0 deletions

diff --git a/source/library/state/storage.ts b/source/library/state/storage.ts
new file mode 100644
index 0000000..a24096a
--- /dev/null
+++ b/source/library/state/storage.ts
@@ -0,0 +1,77 @@
+
+
+
+/*** EXPORT ------------------------------------------- ***/
+
+export type Storage = {
+  get<T>(key: string): T | null;
+  remove(key: string): void;
+  set<T>(key: string, value: T): void;
+};
+
+export function createLocalStorage(namespace: string): Storage {
+  const prefix = `${namespace}:`;
+
+  function available(): boolean {
+    try {
+      return typeof globalThis.localStorage !== "undefined";
+    } catch {
+      return false;
+    }
+  }
+
+  return {
+    get<T>(key: string): T | null {
+      if (!available())
+        return null;
+
+      const raw = globalThis.localStorage.getItem(prefix + key);
+
+      if (raw === null)
+        return null;
+
+      try {
+        return JSON.parse(raw) as T;
+      } catch {
+        return null;
+      }
+    },
+    remove(key: string): void {
+      if (!available())
+        return;
+
+      globalThis.localStorage.removeItem(prefix + key);
+    },
+    set<T>(key: string, value: T): void {
+      if (!available())
+        return;
+
+      globalThis.localStorage.setItem(prefix + key, JSON.stringify(value));
+    }
+  };
+}
+
+export function createMemoryStorage(): Storage {
+  const store = new Map<string, string>();
+
+  return {
+    get<T>(key: string): T | null {
+      const raw = store.get(key);
+
+      if (raw === undefined)
+        return null;
+
+      try {
+        return JSON.parse(raw) as T;
+      } catch {
+        return null;
+      }
+    },
+    remove(key: string): void {
+      store.delete(key);
+    },
+    set<T>(key: string, value: T): void {
+      store.set(key, JSON.stringify(value));
+    }
+  };
+}