v3: dependencies upgraded and deno audit clean, every API response typed end to end, no explicit any left — and the site search stops handing out password hashes — deno audit reported 19 advisories (11 high); none remain. nodemailer 9 → 10.0.10 closes four of them (a quadratic address parser, two recipient-domain allow-list bypasses, resolveContent ignoring disableFileAccess/disableUrlAccess); 10's one break is Node ≥ 20, and 10.0.11 is a day too young for the minimum release age. react-router 8.0.1 → 8.4.0 closes the RSC-mode CSRF bypass. Refreshing the lockfile clears the transitive ones that came in through Vite, ESLint and Lingui: postcss, nanoid, picomatch, browserslist, brace-expansion and baseline-browser-mapping. Everything else moves to its latest too — Lingui 6.8 (its SWC plugin 6.7), React 19.3, Vite 8.3.1, react-hook-form 7.89, marked, jose, ESLint 10.11, typescript-eslint 8.70, the @types — and frimousse 0.3 → 0.4, whose declarations only add (custom emoji data resolvers, a cache). TypeScript stays on 6.0: typescript-eslint supports < 6.1, so 7.0 would stop the lint. allowScripts names @swc/core 1.16.2 and drops esbuild, which Vite 8 no longer installs.

Search: GET /api/search sent each matching user's full row — password hash and email included — to anyone, signed in or not, because searchUsersGlobal returned User[] and the route passed it through. It returns profiles only now, stripped where the rows are read, and the search test fails on the old code. Types alone wouldn't have caught it (a User is structurally a PublicUser), so the strip is explicit and tested.

Typed routes. Every JSON response is declared as APIResponse<T>, the way the typed routes already did, with the missing shapes named in api/model/interfaces.ts: PublicUser (no hash, no email) and SelfUser (your own profile, with email) plus toPublicUser/toSelfUser in place of ten hand-written destructurings, AuthTokens, AuthResponse, MediaTokenResponse, InviteResponse, AttachmentResponse, SearchResults, LinkPreview, UserSuggestion and Invitee. Request bodies are `unknown` and narrowed by the existing guards, or by a new fieldOf(obj, key) where a route reads one field — no more reading off Oak's `any` or casting to Record<string, unknown>. The password-reset routes answer `{ success: true, data: null }` rather than a bare `{ success: true }`, so every success fits the envelope; the frontend only reads `success`.

Socket protocol: routes/ws.ts had its own send() taking Record<string, unknown>, so nothing checked what it sent. It takes ServerToClientMessage now, which turned up two mismatches: `pong` was missing from the union although the server answers every client ping with one, and vote_ack carried a `success: true` no type declares and no client reads. The union has PongMessage and vote_ack lost the field.

No explicit any. The YouTube playlist parse reads ytInitialData as `unknown` through a small at(node, …path) that checks each step, instead of `type Json = any`. The backend test helpers type the response body as the server's envelope: request<T>() and get/post/put/patch/del<T>() name what `data` holds, res.data throws with the server's message when the call didn't succeed and res.error when it didn't fail, and each test says which API type it expects, so a test reading a field the route doesn't send no longer compiles. Assertions that a field is absent are `assertFalse("passwordHash" in …)` rather than reading a field the type says isn't there. The socket tests' messages are ServerToClientMessage, with next()/all() keyed by type so each returns that message's shape.

No double casts in src/ either. window.YT and onYouTubeIframeAPIReady are declared on Window; the test's fake player is a class forwarding to the spies the tests inspect. WSContext, FollowContext and PlayerContext export their defaults (defaultWSValue, defaultFollowValue, defaultPlayerValue), which the tests import instead of reading React's private _currentValue. handleMentionKeyDown takes a MentionKey — the key fields it reads — so the test builds a plain object; useUserDumpFeed declares sentinelRef as the callback ref it is. In src/test/setup.ts the IntersectionObserver fake implements IntersectionObserver, and report(isIntersecting, top?) builds complete entries in place of partial ones cast in five files; the Animation fake implements Animation; the canvas getContext stub goes in through defineProperty. The XHR fake's last request is optional behind a getter that fails if none was made, the keyframes are checked with matchers, and the roleless legacy session is built by leaving the role out. One test changes meaning slightly: "leaving the view…" relied on entries with no position at all, and now leaves and re-enters at the same height, which is what it describes. The one cast left is in api/test/ws.test.ts: deno.json's "dom" lib hides Deno's WebSocket overload that takes handshake headers, and dropping that lib would break the editor's view of src/; it's commented and names the real signature.

Also: the notifications test answered a Response-typed promise with a plain object, which failed `tsc -b`; it uses the fetch stub's deferred() now. ESLint didn't read the `deno-lint-ignore no-explicit-any` comments, so `eslint .` failed on three files; those anys are gone. `deno fmt` over api/ and src/ (not the compiled src/locales/*.js); the reflow left all 332 message ids intact, and the .po files only have their source line references updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/test/pages/PlaylistDetail.test.tsx

@@ -1,5 +1,11 @@
 import { describe, expect, test, vi } from "vitest";
-import { act, fireEvent, screen, waitFor, within } from "@testing-library/react";
+import {
+  act,
+  fireEvent,
+  screen,
+  waitFor,
+  within,
+} from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import { Route } from "react-router";
 import { PlaylistDetail } from "../../pages/PlaylistDetail.tsx";
@@ -19,7 +25,11 @@ const dumps = () => [
 ];
 
 function open(
-  { session = owner as ReturnType<typeof makeSession> | null, playlist = {} as Partial<Playlist>, items = dumps() as Dump[] } = {},
+  {
+    session = owner as ReturnType<typeof makeSession> | null,
+    playlist = {} as Partial<Playlist>,
+    items = dumps() as Dump[],
+  } = {},
 ) {
   const pl = makePlaylist({
     id: "p1",
@@ -44,30 +54,44 @@ function open(
 }
 
 const titles = () =>
-  Array.from(document.querySelectorAll(".dump-card-title")).map((a) => a.textContent);
+  Array.from(document.querySelectorAll(".dump-card-title")).map((a) =>
+    a.textContent
+  );
 
 describe("PlaylistDetail", () => {
   test("shows the playlist and its dumps in order", async () => {
     open({ session: null });
-    expect(await screen.findByRole("heading", { name: "Mix" })).toBeInTheDocument();
+    expect(await screen.findByRole("heading", { name: "Mix" }))
+      .toBeInTheDocument();
     expect(screen.getByText("tunes").tagName).toBe("STRONG");
-    expect(screen.getByRole("link", { name: "@owner" })).toHaveAttribute("href", "/users/owner");
+    expect(screen.getByRole("link", { name: "@owner" })).toHaveAttribute(
+      "href",
+      "/users/owner",
+    );
     expect(titles()).toEqual(["Alpha", "Bravo", "Charlie"]);
     await waitFor(() => expect(document.title).toMatch(/^Mix · /));
-    expect(screen.queryByRole("button", { name: "Edit" })).not.toBeInTheDocument();
+    expect(screen.queryByRole("button", { name: "Edit" })).not
+      .toBeInTheDocument();
   });
 
   test("not found", async () => {
     route("GET /api/playlists/:id", () => fail("nope", 404));
-    renderApp(<PlaylistDetail />, { route: "/playlists/x", path: "/playlists/:playlistId" });
-    expect(await screen.findByRole("alert")).toHaveTextContent("Playlist not found");
+    renderApp(<PlaylistDetail />, {
+      route: "/playlists/x",
+      path: "/playlists/:playlistId",
+    });
+    expect(await screen.findByRole("alert")).toHaveTextContent(
+      "Playlist not found",
+    );
   });
 
   test("a visitor can follow a public playlist, not edit it", async () => {
     open({ session: visitor });
     await screen.findByRole("heading", { name: "Mix" });
-    expect(screen.getByRole("button", { name: "Follow playlist" })).toBeInTheDocument();
-    expect(screen.queryByRole("button", { name: "Remove from playlist" })).not.toBeInTheDocument();
+    expect(screen.getByRole("button", { name: "Follow playlist" }))
+      .toBeInTheDocument();
+    expect(screen.queryByRole("button", { name: "Remove from playlist" })).not
+      .toBeInTheDocument();
   });
 
   test("the cover is versioned on the last edit", async () => {
@@ -80,8 +104,19 @@ describe("PlaylistDetail", () => {
   });
 
   test("editing the description shows at once, without waiting for the socket", async () => {
-    route("PUT /api/playlists/:id", () =>
-      wire(makePlaylist({ id: "p1", slug: "mix", title: "Mix", userId: "owner", description: "Better tunes" })));
+    route(
+      "PUT /api/playlists/:id",
+      () =>
+        wire(
+          makePlaylist({
+            id: "p1",
+            slug: "mix",
+            title: "Mix",
+            userId: "owner",
+            description: "Better tunes",
+          }),
+        ),
+    );
     const { user } = open();
     await user.click(await screen.findByRole("button", { name: "Edit" }));
     const box = screen.getByPlaceholderText("Description (optional)");
@@ -89,13 +124,26 @@ describe("PlaylistDetail", () => {
     await user.type(box, "Better tunes");
     await user.click(screen.getByRole("button", { name: "Save" }));
     expect(await screen.findByText("Better tunes")).toBeInTheDocument();
-    expect(calls("PUT /api/playlists/:id")[0].body).toEqual({ description: "Better tunes", isPublic: true });
+    expect(calls("PUT /api/playlists/:id")[0].body).toEqual({
+      description: "Better tunes",
+      isPublic: true,
+    });
     expect(currentPath()).toBe("/playlists/mix");
   });
 
   test("a new title moves to the new slug", async () => {
-    route("PUT /api/playlists/:id", () =>
-      wire(makePlaylist({ id: "p1", slug: "remix", title: "Remix", userId: "owner" })));
+    route(
+      "PUT /api/playlists/:id",
+      () =>
+        wire(
+          makePlaylist({
+            id: "p1",
+            slug: "remix",
+            title: "Remix",
+            userId: "owner",
+          }),
+        ),
+    );
     const { user } = open();
     await user.click(await screen.findByRole("button", { name: "Edit" }));
     const title = screen.getByPlaceholderText("Playlist title");
@@ -107,14 +155,44 @@ describe("PlaylistDetail", () => {
 
   test("a new cover shows once saved; a refused one says why", async () => {
     vi.spyOn(URL, "createObjectURL").mockReturnValue("blob:preview");
-    route("PUT /api/playlists/:id", () => wire(makePlaylist({ id: "p1", slug: "mix", title: "Mix", userId: "owner" })));
-    route("POST /api/playlists/:id/image", () => fail("Not an image", 400), { once: true });
-    route("POST /api/playlists/:id/image", () =>
-      wire(makePlaylist({ id: "p1", slug: "mix", title: "Mix", userId: "owner", imageMime: "image/png", updatedAt: new Date(9000) })));
+    route(
+      "PUT /api/playlists/:id",
+      () =>
+        wire(
+          makePlaylist({
+            id: "p1",
+            slug: "mix",
+            title: "Mix",
+            userId: "owner",
+          }),
+        ),
+    );
+    route("POST /api/playlists/:id/image", () => fail("Not an image", 400), {
+      once: true,
+    });
+    route(
+      "POST /api/playlists/:id/image",
+      () =>
+        wire(
+          makePlaylist({
+            id: "p1",
+            slug: "mix",
+            title: "Mix",
+            userId: "owner",
+            imageMime: "image/png",
+            updatedAt: new Date(9000),
+          }),
+        ),
+    );
     const { user } = open();
     await user.click(await screen.findByRole("button", { name: "Edit" }));
-    const picker = document.querySelector<HTMLInputElement>('.img-picker input[type="file"]')!;
-    await user.upload(picker, new File([new Uint8Array(3)], "c.png", { type: "image/png" }));
+    const picker = document.querySelector<HTMLInputElement>(
+      '.img-picker input[type="file"]',
+    )!;
+    await user.upload(
+      picker,
+      new File([new Uint8Array(3)], "c.png", { type: "image/png" }),
+    );
     await user.click(screen.getByRole("button", { name: "Save" }));
     expect(await screen.findByRole("alert")).toHaveTextContent("Not an image");
     await user.click(screen.getByRole("button", { name: "Save" }));
@@ -136,19 +214,36 @@ describe("PlaylistDetail", () => {
   test("removing a dump fades it out, with an undo", async () => {
     vi.useFakeTimers({ shouldAdvanceTime: true });
     try {
-      route("DELETE /api/playlists/:pid/dumps/:did", () => new Response(null, { status: 204 }));
+      route(
+        "DELETE /api/playlists/:pid/dumps/:did",
+        () => new Response(null, { status: 204 }),
+      );
       route("POST /api/playlists/:pid/dumps/:did", () => ({}));
       route("PUT /api/playlists/:pid/order", () => ({}));
       const { user } = open();
       await screen.findByText("Bravo");
-      const bravo = screen.getByText("Bravo").closest(".playlist-dump-item") as HTMLElement;
-      await user.click(within(bravo).getByRole("button", { name: "Remove from playlist" }));
-      expect(calls("DELETE /api/playlists/:pid/dumps/:did")[0].path).toBe("/api/playlists/mix/dumps/b");
-      await user.click(within(bravo).getByRole("button", { name: "Cancel removal" }));
-      await waitFor(() => expect(calls("PUT /api/playlists/:pid/order")).toHaveLength(1));
-      expect(calls("PUT /api/playlists/:pid/order")[0].body).toEqual({ dumpIds: ["a", "b", "c"] });
+      const bravo = screen.getByText("Bravo").closest(
+        ".playlist-dump-item",
+      ) as HTMLElement;
+      await user.click(
+        within(bravo).getByRole("button", { name: "Remove from playlist" }),
+      );
+      expect(calls("DELETE /api/playlists/:pid/dumps/:did")[0].path).toBe(
+        "/api/playlists/mix/dumps/b",
+      );
+      await user.click(
+        within(bravo).getByRole("button", { name: "Cancel removal" }),
+      );
+      await waitFor(() =>
+        expect(calls("PUT /api/playlists/:pid/order")).toHaveLength(1)
+      );
+      expect(calls("PUT /api/playlists/:pid/order")[0].body).toEqual({
+        dumpIds: ["a", "b", "c"],
+      });
 
-      await user.click(within(bravo).getByRole("button", { name: "Remove from playlist" }));
+      await user.click(
+        within(bravo).getByRole("button", { name: "Remove from playlist" }),
+      );
       act(() => vi.advanceTimersByTime(2_400));
       expect(screen.queryByText("Bravo")).not.toBeInTheDocument();
     } finally {
@@ -157,20 +252,31 @@ describe("PlaylistDetail", () => {
   });
 
   test("a refused removal puts the dump back and says so", async () => {
-    route("DELETE /api/playlists/:pid/dumps/:did", () => fail("Forbidden", 403));
+    route(
+      "DELETE /api/playlists/:pid/dumps/:did",
+      () => fail("Forbidden", 403),
+    );
     const { user } = open();
     await screen.findByText("Bravo");
-    const bravo = screen.getByText("Bravo").closest(".playlist-dump-item") as HTMLElement;
-    await user.click(within(bravo).getByRole("button", { name: "Remove from playlist" }));
-    expect(await screen.findByRole("alert")).toHaveTextContent("couldn't be removed");
-    expect(within(bravo).getByRole("button", { name: "Remove from playlist" })).toBeInTheDocument();
+    const bravo = screen.getByText("Bravo").closest(
+      ".playlist-dump-item",
+    ) as HTMLElement;
+    await user.click(
+      within(bravo).getByRole("button", { name: "Remove from playlist" }),
+    );
+    expect(await screen.findByRole("alert")).toHaveTextContent(
+      "couldn't be removed",
+    );
+    expect(within(bravo).getByRole("button", { name: "Remove from playlist" }))
+      .toBeInTheDocument();
   });
 
   test("dragging reorders, and a refused reorder reloads the real order", async () => {
     route("PUT /api/playlists/:pid/order", () => fail("Forbidden", 403));
     open();
     await screen.findByText("Charlie");
-    const items = () => Array.from(document.querySelectorAll<HTMLElement>(".playlist-dump-item"));
+    const items = () =>
+      Array.from(document.querySelectorAll<HTMLElement>(".playlist-dump-item"));
     for (const el of items()) {
       el.getBoundingClientRect = () => ({ top: 0, height: 100 }) as DOMRect;
     }
@@ -179,18 +285,33 @@ describe("PlaylistDetail", () => {
     fireEvent.dragOver(c, { clientY: 90 });
     expect(titles()).toEqual(["Bravo", "Charlie", "Alpha"]);
     fireEvent.dragEnd(items()[2]);
-    await waitFor(() => expect(calls("PUT /api/playlists/:pid/order")).toHaveLength(1));
-    expect(calls("PUT /api/playlists/:pid/order")[0].body).toEqual({ dumpIds: ["b", "c", "a"] });
-    await waitFor(() => expect(calls("GET /api/playlists/:id")).toHaveLength(2));
-    await waitFor(() => expect(titles()).toEqual(["Alpha", "Bravo", "Charlie"]));
+    await waitFor(() =>
+      expect(calls("PUT /api/playlists/:pid/order")).toHaveLength(1)
+    );
+    expect(calls("PUT /api/playlists/:pid/order")[0].body).toEqual({
+      dumpIds: ["b", "c", "a"],
+    });
+    await waitFor(() =>
+      expect(calls("GET /api/playlists/:id")).toHaveLength(2)
+    );
+    await waitFor(() =>
+      expect(titles()).toEqual(["Alpha", "Bravo", "Charlie"])
+    );
   });
 
   test("deleting the playlist asks, then goes home", async () => {
-    route("DELETE /api/playlists/:id", () => new Response(null, { status: 204 }));
+    route(
+      "DELETE /api/playlists/:id",
+      () => new Response(null, { status: 204 }),
+    );
     const { user } = open();
     await user.click(await screen.findByRole("button", { name: "Edit" }));
     await user.click(screen.getByRole("button", { name: "Delete" }));
-    await user.click(within(screen.getByRole("alertdialog")).getByRole("button", { name: "Delete playlist" }));
+    await user.click(
+      within(screen.getByRole("alertdialog")).getByRole("button", {
+        name: "Delete playlist",
+      }),
+    );
     expect(await screen.findByText("home")).toBeInTheDocument();
   });
 
@@ -199,22 +320,44 @@ describe("PlaylistDetail", () => {
     const { user } = open();
     await user.click(await screen.findByRole("button", { name: "Edit" }));
     await user.click(screen.getByRole("button", { name: "Delete" }));
-    await user.click(within(screen.getByRole("alertdialog")).getByRole("button", { name: "Delete playlist" }));
+    await user.click(
+      within(screen.getByRole("alertdialog")).getByRole("button", {
+        name: "Delete playlist",
+      }),
+    );
     expect(await screen.findByRole("alert")).toHaveTextContent("Forbidden");
     expect(currentPath()).toBe("/playlists/mix");
   });
 
   test("live: added dumps appear, removed ones fade, a deleted playlist sends you home", async () => {
-    route("GET /api/dumps/:id", () => wire(makeDump({ id: "d", title: "Delta" })));
+    route(
+      "GET /api/dumps/:id",
+      () => wire(makeDump({ id: "d", title: "Delta" })),
+    );
     const { socket } = open({ session: visitor });
     await screen.findByText("Alpha");
-    socket.receive({ type: "playlist_dumps_updated", playlistId: "p1", dumpIds: ["d", "a", "b", "c"], dumpCount: 4 });
+    socket.receive({
+      type: "playlist_dumps_updated",
+      playlistId: "p1",
+      dumpIds: ["d", "a", "b", "c"],
+      dumpCount: 4,
+    });
     expect(await screen.findByText("Delta")).toBeInTheDocument();
-    socket.receive({ type: "playlist_updated", playlist: wire(makePlaylist({ id: "p1", title: "Renamed", userId: "owner" })) });
-    expect(screen.getByRole("heading", { name: "Renamed" })).toBeInTheDocument();
+    socket.receive({
+      type: "playlist_updated",
+      playlist: wire(
+        makePlaylist({ id: "p1", title: "Renamed", userId: "owner" }),
+      ),
+    });
+    expect(screen.getByRole("heading", { name: "Renamed" }))
+      .toBeInTheDocument();
     socket.receive({ type: "dump_deleted", dumpId: "a" });
     expect(screen.queryByText("Alpha")).not.toBeInTheDocument();
-    socket.receive({ type: "playlist_deleted", playlistId: "p1", userId: "owner" });
+    socket.receive({
+      type: "playlist_deleted",
+      playlistId: "p1",
+      userId: "owner",
+    });
     expect(await screen.findByText("home")).toBeInTheDocument();
   });
 });