diff --git a/apps/web/src/app.css b/apps/web/src/app.css
index 2e00c37c..f44313b9 100644
--- a/apps/web/src/app.css
+++ b/apps/web/src/app.css
@@ -12,6 +12,21 @@
 @import "@corbits/tasks-ui/styles.css";
 @import "@corbits/plugins-ui/styles.css";
 
+/* react-ui's `.corbits-toast` ships a hardcoded horizontal-center transform
+   (`left: 50%; transform: translateX(-50%) !important`) regardless of the
+   `position` prop passed to `<Toaster>` — main.tsx now mounts it
+   bottom-right, and without this the toast would still visually sit
+   centered while claiming to be on the right. Sonner itself already
+   right-aligns the toast via its own `[data-x-position="right"]` rule
+   (injected at runtime, unrelated to this stylesheet); this just stops
+   react-ui's override from fighting it. Higher specificity than that rule
+   wins the cascade on its own, so this is safe regardless of load order. */
+[data-sonner-toaster][data-x-position="right"]
+  [data-sonner-toast].corbits-toast {
+  left: auto !important;
+  transform: none !important;
+}
+
 /* Mock chrome: 15px root so rem-based density matches the interactive mock. */
 html {
   font-size: 15px;
diff --git a/apps/web/src/main.tsx b/apps/web/src/main.tsx
index 96f591d2..bca0b99d 100644
--- a/apps/web/src/main.tsx
+++ b/apps/web/src/main.tsx
@@ -114,7 +114,7 @@ function Root() {
         provisioningErrorRefId={provisioningError?.refId}
         onRetryProvisioning={handleRetryProvisioning}
       />
-      <Toaster />
+      <Toaster position="bottom-right" />
     </ThemeProvider>
   );
 }
diff --git a/apps/web/src/pages/library-page.tsx b/apps/web/src/pages/library-page.tsx
index 14e26c6b..7f6b8b43 100644
--- a/apps/web/src/pages/library-page.tsx
+++ b/apps/web/src/pages/library-page.tsx
@@ -251,7 +251,7 @@ function PreviewPane({
       ? artifactPreviewPath(tenantId, detail.id)
       : undefined;
   return (
-    <aside className="flex min-h-0 min-w-0 flex-col border-l border-border bg-card">
+    <aside className="flex h-full min-h-0 min-w-0 flex-col border-l border-border bg-card">
       <div className="flex items-center justify-between gap-2 border-b border-border px-4 py-3">
         <div className="min-w-0">
           <p className="truncate text-sm font-semibold">
@@ -443,15 +443,24 @@ export function LibraryPage({
         actions={
           <>
             {selectedSummary !== null ? (
-              <Button variant="outline" size="sm" onClick={() => select(null)}>
-                All
+              // This clears the open file and returns to the list — an
+              // action, not a filter. It used to say bare "All", which read
+              // as a third option in the scope group right beside it ("All"
+              // vs. "All workbenches"); this label can't be mistaken for
+              // that.
+              <Button variant="ghost" size="sm" onClick={() => select(null)}>
+                Back to files
               </Button>
             ) : null}
             {workbenchScope !== null && onScopeChange !== undefined ? (
+              // One control, two states — answers exactly one question
+              // ("whose files"), styled as the bordered segmented group
+              // `ViewToggle` already uses for rows/grid in this same bar, so
+              // it reads as one control rather than two stray chips.
               <div
                 role="group"
                 aria-label="Files scope"
-                className="hidden items-center gap-1 lg:flex"
+                className="hidden items-center gap-0.5 rounded-md border border-border p-0.5 lg:flex"
               >
                 <Button
                   type="button"
@@ -770,11 +779,23 @@ export function LibraryRoute({ path }: { readonly path: string }) {
                 setUploading(true);
                 setUploadError(null);
                 try {
-                  await uploadArtifactFiles(selectedTenantId, files);
+                  const uploaded = await uploadArtifactFiles(
+                    selectedTenantId,
+                    files,
+                  );
                   await queryClient.invalidateQueries({
                     queryKey: tenantKeys.artifacts(selectedTenantId),
                   });
-                  toast(artifactUploadToast(files.map((file) => file.name)));
+                  // The confirmation names what the server actually stored
+                  // (its own titles), never the local `File` picked — the
+                  // two can differ (e.g. a collision rename), and a sibling
+                  // fix for empty content read-back means this toast must
+                  // only ever repeat the upload response, not assume it.
+                  toast(
+                    artifactUploadToast(
+                      uploaded.map((artifact) => artifact.title),
+                    ),
+                  );
                 } catch (err) {
                   setUploadError(
                     describeApiError(err, "uploading those files"),
diff --git a/apps/web/test/library-page-selection.test.tsx b/apps/web/test/library-page-selection.test.tsx
index 242c713e..a9f3753a 100644
--- a/apps/web/test/library-page-selection.test.tsx
+++ b/apps/web/test/library-page-selection.test.tsx
@@ -314,4 +314,54 @@ describe("LibraryPage top-nav action placement", () => {
     });
     expect(container.querySelector('[data-slot="table"]')).not.toBeNull();
   });
+
+  test("the workbench-scope pair reads as one grouped control, distinct from the clear-selection action", () => {
+    act(() => {
+      root.render(
+        <LibraryPage
+          artifacts={artifacts}
+          selectedId="art_1"
+          onSelect={() => undefined}
+          workbenchScope={{ title: "Launch plan" }}
+          scope="all"
+          onScopeChange={() => undefined}
+        />,
+      );
+    });
+    const topBarActions = container.querySelector(
+      '[data-testid="stage-top-bar-actions"]',
+    );
+    // The two-state scope toggle is visually one control (a bordered
+    // segmented group, the same idiom `ViewToggle` already uses in this
+    // bar) rather than two stray buttons that read as independent chips.
+    const scopeGroup = topBarActions?.querySelector(
+      '[aria-label="Files scope"]',
+    );
+    expect(scopeGroup?.className).toContain("border");
+    expect(scopeGroup?.textContent).toContain("Launch plan");
+    expect(scopeGroup?.textContent).toContain("All workbenches");
+
+    // The clear-selection action is not a filter and must not read as one:
+    // no button labelled bare "All" sits beside "All workbenches".
+    const buttons = [...(topBarActions?.querySelectorAll("button") ?? [])];
+    expect(buttons.some((b) => b.textContent?.trim() === "All")).toBe(false);
+    expect(buttons.some((b) => b.textContent?.trim() === "Back to files")).toBe(
+      true,
+    );
+  });
+
+  test("the file detail pane fills the available height", () => {
+    act(() => {
+      root.render(
+        <LibraryPage
+          artifacts={artifacts}
+          selectedId="art_1"
+          onSelect={() => undefined}
+        />,
+      );
+    });
+    const pane = container.querySelector("aside");
+    expect(pane).not.toBeNull();
+    expect(pane?.className).toContain("h-full");
+  });
 });
diff --git a/apps/web/test/library-upload-confirmation.test.tsx b/apps/web/test/library-upload-confirmation.test.tsx
new file mode 100644
index 00000000..bf89a2c1
--- /dev/null
+++ b/apps/web/test/library-upload-confirmation.test.tsx
@@ -0,0 +1,169 @@
+// The owner reported uploading a file with no way to tell it worked. The
+// fix must be an honest confirmation: it names the file the server actually
+// stored, not the one the browser happened to send, and it stays silent
+// (surfacing the failure instead) when the upload endpoint reports one.
+// A sibling lane is fixing a real bug where uploaded content reads back
+// empty — this suite only pins that the toast is grounded in the upload
+// response, never a blind echo of the local `File` picked.
+
+import { afterEach, beforeEach, describe, expect, test } from "bun:test";
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+
+import { BenchProvider } from "../src/bench-context";
+import { NavigationProvider } from "../src/navigation";
+import { LibraryRoute } from "../src/pages/library-page";
+import { spyOnReactUiToast } from "./react-ui-toast-mock";
+import { TestQueryProvider } from "./test-query-provider";
+
+const toastMock = spyOnReactUiToast();
+const noop = () => undefined;
+const realFetch = globalThis.fetch;
+
+const membership = {
+  principalId: "prn_1",
+  tenantId: "tnt_1",
+  tenantName: "Test Bench",
+  tenantSlug: "test-bench",
+  kind: "user",
+  status: "active",
+  roles: [],
+};
+
+function jsonResponse(body: unknown, status = 200): Response {
+  return new Response(JSON.stringify(body), {
+    status,
+    headers: { "content-type": "application/json" },
+  });
+}
+
+function uploadFile(container: HTMLDivElement, file: File): void {
+  const input = container.querySelector(
+    'input[aria-label="Upload files"]',
+  ) as HTMLInputElement | null;
+  if (input === null) throw new Error("no upload input");
+  Object.defineProperty(input, "files", {
+    configurable: true,
+    value: [file],
+  });
+  act(() => {
+    input.dispatchEvent(new Event("change", { bubbles: true }));
+  });
+}
+
+describe("Files upload confirmation", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(() => {
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+    toastMock.mockClear();
+  });
+
+  afterEach(() => {
+    act(() => root.unmount());
+    container.remove();
+    globalThis.fetch = realFetch;
+    window.localStorage.clear();
+  });
+
+  async function settle(until: () => boolean): Promise<void> {
+    for (let i = 0; i < 30; i++) {
+      await act(async () => {
+        await new Promise((resolve) => setTimeout(resolve, 0));
+      });
+      if (until()) return;
+    }
+  }
+
+  function renderRoute(): void {
+    act(() => {
+      root.render(
+        <TestQueryProvider>
+          <NavigationProvider navigate={noop}>
+            <BenchProvider>
+              <LibraryRoute path="/files" />
+            </BenchProvider>
+          </NavigationProvider>
+        </TestQueryProvider>,
+      );
+    });
+  }
+
+  test("a completed upload confirms the title the server stored, not the local file name", async () => {
+    globalThis.fetch = ((input: RequestInfo | URL, init?: RequestInit) => {
+      const url = String(input);
+      if (url.includes("/api/me/principals")) {
+        return Promise.resolve(
+          jsonResponse({ data: [membership], nextCursor: null }),
+        );
+      }
+      if (url.includes("/artifacts/upload") && init?.method === "POST") {
+        return Promise.resolve(
+          jsonResponse({
+            data: [
+              {
+                id: "art_new",
+                kind: "document",
+                // The server renamed it on collision — the confirmation
+                // must say this, not the "draft.txt" the browser sent.
+                title: "draft (1).txt",
+                source: {},
+                version: 1,
+                ownerPrincipalId: null,
+                ownerName: null,
+                content: "",
+                archivedAt: null,
+                createdAt: "2026-08-01T00:00:00.000Z",
+                updatedAt: "2026-08-01T00:00:00.000Z",
+              },
+            ],
+          }),
+        );
+      }
+      if (url.includes("/artifacts")) {
+        return Promise.resolve(jsonResponse({ data: [], nextCursor: null }));
+      }
+      return Promise.reject(new Error(`unrouted fetch: ${url}`));
+    }) as typeof fetch;
+
+    renderRoute();
+    await settle(() => container.querySelector('input[type="file"]') !== null);
+
+    uploadFile(container, new File(["hi"], "draft.txt"));
+    await settle(() => toastMock.mock.calls.length > 0);
+
+    expect(toastMock).toHaveBeenCalledWith("Uploaded · draft (1).txt");
+    expect(container.textContent).not.toContain("draft.txt");
+  });
+
+  test("a failed upload surfaces the failure instead of a fake success toast", async () => {
+    globalThis.fetch = ((input: RequestInfo | URL, init?: RequestInit) => {
+      const url = String(input);
+      if (url.includes("/api/me/principals")) {
+        return Promise.resolve(
+          jsonResponse({ data: [membership], nextCursor: null }),
+        );
+      }
+      if (url.includes("/artifacts/upload") && init?.method === "POST") {
+        return Promise.resolve(jsonResponse({ error: "boom" }, 500));
+      }
+      if (url.includes("/artifacts")) {
+        return Promise.resolve(jsonResponse({ data: [], nextCursor: null }));
+      }
+      return Promise.reject(new Error(`unrouted fetch: ${url}`));
+    }) as typeof fetch;
+
+    renderRoute();
+    await settle(() => container.querySelector('input[type="file"]') !== null);
+
+    uploadFile(container, new File(["hi"], "draft.txt"));
+    await settle(() => container.querySelector('[role="alert"]') !== null);
+
+    expect(toastMock).not.toHaveBeenCalled();
+    const alert = container.querySelector('[role="alert"]');
+    expect(alert?.textContent).toBeTruthy();
+  });
+});
diff --git a/apps/web/test/toast-single-system.test.tsx b/apps/web/test/toast-single-system.test.tsx
index ecec0ac6..226e97b4 100644
--- a/apps/web/test/toast-single-system.test.tsx
+++ b/apps/web/test/toast-single-system.test.tsx
@@ -205,4 +205,36 @@ describe("the one toast system (CL-6372)", () => {
     });
     expect(visibleToasts().length).toBe(0);
   });
+
+  // The owner's earlier screenshots showed the toast bottom-center, easy to
+  // miss against page content. main.tsx (the app's one `<Toaster>` mount)
+  // now passes `position="bottom-right"` — asserted here the same way the
+  // house-styling test above asserts the default, so a regression back to
+  // center fails this instead of only showing up in a screenshot.
+  test("the app's Toaster mounts bottom-right, not the library default bottom-center", async () => {
+    stubFailingCreate();
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+    await act(async () => {
+      root?.render(
+        <TestQueryProvider>
+          <NavigationProvider navigate={() => undefined}>
+            <BenchProvider>
+              <NewWorkbenchPickerRoute />
+            </BenchProvider>
+          </NavigationProvider>
+          <Toaster position="bottom-right" />
+        </TestQueryProvider>,
+      );
+    });
+
+    act(() => toast("Uploaded · draft.txt"));
+    await settle();
+
+    const region = document.body.querySelector("[data-sonner-toaster]");
+    expect(region?.getAttribute("data-y-position")).toBe("bottom");
+    expect(region?.getAttribute("data-x-position")).toBe("right");
+    await waitForClear();
+  });
 });