fix: livrable tickets #70 #100 #102 — UX surface scoping

- #70: implémentation suppression modèles locaux téléchargés
- #100: correction scroll OpenCode
- #102: correction fit TUI après switch/layout
- memory note scoping UX

frontend/src/features/git/git.test.tsx

@@ -59,8 +59,8 @@ describe("GitPanel (with MockGitGateway)", () => {
     renderPanel(git);
     await waitForPanel();
 
-    expect(screen.getByText("Staged")).toBeTruthy();
-    expect(screen.getByText("Unstaged")).toBeTruthy();
+    await screen.findByText("Staged");
+    await screen.findByText("Unstaged");
     // src/main.rs is staged → Unstage button exists
     expect(
       screen.getByRole("button", { name: "unstage src/main.rs" }),