fix(#105): corrige le contexte plugin pour hello-plugin

Ajoute logger, subscriptions et commandes scindées au contexte plugin
activé. Les plugins full-trust s'attendent à ce shape public.

frontend/src/plugins/runtime/loader.test.ts

@@ -117,6 +117,47 @@ describe("loadPlugins", () => {
     expect((globalThis as Record<string, unknown>).__ranCommand).toBe(true);
   });
 
+  it("loads plugins built against the public SDK context shape", async () => {
+    const bundle = dataUrl(`
+      export function activate(ctx) {
+        ctx.logger.info("hello");
+        const disposable = ctx.commands.registerCommand("hello-plugin.sayHello", () => {
+          globalThis.__helloCommandRan = true;
+          return "Hello from IdeA";
+        });
+        ctx.subscriptions.push(disposable);
+      }
+    `);
+    const { registry, failures } = await loadPlugins(
+      [
+        entry({
+          id: "com.example.hello-plugin",
+          displayName: "Hello Plugin",
+          bundleUrl: bundle,
+          contributes: {
+            ...emptyContributes(),
+            menuItems: [
+              {
+                id: "hello-plugin.sayHello.item",
+                targetMenuId: "plugin:hello-plugin.menu",
+                label: "Say Hello",
+                command: "hello-plugin.sayHello",
+              },
+            ],
+          },
+        }),
+      ],
+      gateways,
+    );
+
+    expect(failures).toEqual([]);
+    await registry.runCommand("com.example.hello-plugin", "hello-plugin.sayHello");
+    expect((globalThis as Record<string, unknown>).__helloCommandRan).toBe(true);
+
+    await registry.remove("com.example.hello-plugin");
+    expect(registry.get("com.example.hello-plugin")).toBeUndefined();
+  });
+
   it("calls dispose() on removal (best-effort)", async () => {
     const bundle = dataUrl(`
       export function activate(ctx) {