From f1c066db6eaba4b2e76d9ffaf104579de365671d Mon Sep 17 00:00:00 2001
From: Logan <logan@ljones.me>
Date: Wed, 19 Aug 2026 13:18:55 -0400
Subject: [PATCH] fix(page-header): collapse the actions that do not fit into a
 menu
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Playlists slotted three buttons totalling 390px into a header that gets
700px at 900x600, so "New Smart Playlist" rendered 114 of its 162px
with the queue closed, and 158 of 162 at the 800x600 enforced minimum.
On a phone none of the three could be reached at all, which is what the
Android report said. Plan 018's size matrix promises the opposite: no
action is ever unreachable at any supported size.

The header could not fix that for slotted markup, and that is a fact
about the API rather than an effort estimate — a component cannot move
another component's light-DOM children into a dropdown and keep their
behaviour, and arbitrary markup offers nothing generic to render as a
menu item. So a host passes `PageAction[]` and the header chooses the
rendering; the slot survives for markup a data list cannot express, at
the stated cost that a slotted action does not collapse.

All three hosts that slot actions migrated, which also normalises the
plain-<button>/<wa-button> split between them onto one shape the header
styles — and lets it measure a button that has already upgraded, rather
than a wa-button whose shadow DOM arrives in its own first update.

Four things in it are load-bearing:

- Every measuring pass starts from all-visible, so the collapsed set is
  a pure function of the current width and an action comes back when
  the window grows. It flips `hidden` imperatively rather than
  re-rendering between steps, or the intermediate state paints and the
  fix flashes the overflow it exists to prevent.
- "Fits" means nothing is clipped, not that the header does not
  overflow. Once the title can ellipsis it absorbs the pressure and
  scrollWidth reports a perfect fit while the heading reads "Playlis…"
  — this bug moved from the button to the title, and invisible to the
  same measurement that missed it the first time.
- New Playlist has the highest priority because it is the drop target
  and a closed menu cannot be one. `PageAction.drop` therefore carries
  the host's own handlers; the affordance is absent from the overflow
  rather than approximated there.
- The overflow trigger is a named button with aria-expanded and an
  aria-controls naming a panel that is always in the DOM, and the
  keyboard model is the shared `MenuKeyboard`.

`layout-overflow.spec.ts` passes on the broken build — it asserts the
shell needs no sideways scrolling, and clipping inside a component is
invisible to it, which is why this defect survived a spec named for it.
The new spec measures each button against its own header at four
viewports and asserts buttons plus menu account for every declared
action, without which it would pass vacuously on a build rendering none.

Closes #69
---
 e2e/specs/header-action-overflow.spec.ts      | 318 +++++++++++
 .../src/assets/icons/fa/solid/ellipsis.svg    |   1 +
 .../downloads-view/downloads-view.ts          |  35 +-
 .../src/components/home-view/home-view.ts     |  38 +-
 .../src/components/page-header/page-header.ts | 536 +++++++++++++++++-
 .../components/playlist-view/playlist-view.ts | 135 ++---
 .../smart-playlist-details.ts                 |   3 +-
 frontend/src/icons/names.txt                  |   1 +
 frontend/src/utils/icon-language.ts           |  24 +
 frontend/test/components/home-view.test.ts    |  13 +-
 .../test/components/icon-language.test.ts     |   2 +
 frontend/test/components/page-header.test.ts  | 321 ++++++++++-
 12 files changed, 1304 insertions(+), 123 deletions(-)
 create mode 100644 e2e/specs/header-action-overflow.spec.ts
 create mode 100644 frontend/src/assets/icons/fa/solid/ellipsis.svg

diff --git a/e2e/specs/header-action-overflow.spec.ts b/e2e/specs/header-action-overflow.spec.ts
new file mode 100644
index 0000000..d37b823
--- /dev/null
+++ b/e2e/specs/header-action-overflow.spec.ts
@@ -0,0 +1,318 @@
+import { test, expect } from '../support/fixtures.js';
+
+/**
+ * #69: the Playlists header's buttons could not be reached.
+ *
+ * Three text buttons — Import (91px), New Playlist (122px), New Smart
+ * Playlist (162px), 390px in total — inside a header that gets 700px at
+ * 900×600. "New Smart Playlist" rendered **114 of its 162px**, and at
+ * phone width the Android report was the plain version of it: you
+ * cannot scroll to reach them, and scrolling is not how page controls
+ * should be exposed anyway.
+ *
+ * **`layout-overflow.spec.ts` passes on the broken build**, which is why
+ * this file exists rather than a case being added there. That spec
+ * asserts the *shell* needs no sideways scrolling; clipping *inside* a
+ * component is invisible to it. So the measurement here is per-button
+ * and per-header, against the widths the app promises.
+ *
+ * Plan 018's size matrix is the promise being kept: **no action is ever
+ * unreachable at any supported size.** These are its three bands.
+ */
+
+const VIEWPORTS = [
+  // Desktop's worst case, and not the enforced minimum: the sidebar
+  // collapses to icons *below* 900, so the content area is 843px at 899
+  // and 700px at 900. Testing "the minimum" and stopping misses it.
+  { name: '900×600 (widest sidebar, narrowest content)', width: 900, height: 600 },
+  { name: '800×600 (the enforced minimum)', width: 800, height: 600 },
+  { name: '390×780 (phone)', width: 390, height: 780 },
+  // WCAG 1.4.10's reflow target, which plan 018 promises the app fits.
+  { name: '320×600 (400% zoom)', width: 320, height: 600 },
+];
+
+/** Every action the Playlists header can offer, in declared order. */
+const ACTIONS = ['Import', 'New Playlist', 'New Smart Playlist'];
+
+/**
+ * What the header is actually rendering, measured rather than inferred.
+ *
+ * A shadow query is the wrong tool for *asserting* — that is what
+ * `getByRole` below is for — but it is the right one for a measurement,
+ * because the number this issue is about (a button 48px wider than the
+ * box holding it) is not in the accessibility tree at all.
+ */
+const headerFit = (page: import('@playwright/test').Page) =>
+  page.evaluate(() => {
+    const root = document
+      .querySelector('[data-testid="main-content"] playlist-view')
+      ?.shadowRoot?.querySelector('page-header')?.shadowRoot;
+
+    if (!root) return null;
+
+    const header = root.querySelector<HTMLElement>('.page-header')!;
+    const box = header.getBoundingClientRect();
+    const title = root.querySelector<HTMLElement>('h1')!;
+
+    const clipped = [
+      ...root.querySelectorAll<HTMLElement>('.action, .more-button'),
+    ]
+      .filter((b) => !b.hidden)
+      .filter((b) => {
+        const r = b.getBoundingClientRect();
+
+        return r.right > box.right + 1 || r.left < box.left - 1;
+      })
+      .map((b) => b.dataset['actionId'] ?? 'more');
+
+    return {
+      overflow: header.scrollWidth - header.clientWidth,
+      clipped,
+      titleTruncated: title.scrollWidth > title.clientWidth + 1,
+      buttons: [...root.querySelectorAll<HTMLElement>('.action')]
+        .filter((b) => !b.hidden)
+        .map((b) => b.textContent?.trim() ?? ''),
+      menu: [
+        ...root.querySelectorAll('#page-header-overflow wa-dropdown-item'),
+      ].map((i) => i.textContent?.trim() ?? ''),
+    };
+  });
+
+test.describe('the page header never clips an action', () => {
+  test.beforeEach(async ({ app }) => {
+    await app.getByTestId('nav-playlists').click();
+    await expect(app.getByTestId('main-content')).toHaveAttribute(
+      'data-active-view',
+      'playlists',
+    );
+  });
+
+  test.afterEach(async ({ app }) => {
+    await app.setViewportSize({ width: 1280, height: 800 });
+  });
+
+  for (const vp of VIEWPORTS) {
+    test(`every action is reachable at ${vp.name}`, async ({ app }) => {
+      await app.setViewportSize({ width: vp.width, height: vp.height });
+
+      // Polled: the fit is decided by a ResizeObserver, so it settles a
+      // frame after the resize rather than with it.
+      await expect
+        .poll(async () => (await headerFit(app))?.clipped)
+        .toEqual([]);
+
+      const fit = (await headerFit(app))!;
+
+      expect(fit.overflow).toBeLessThanOrEqual(0);
+
+      // Between them, buttons and menu account for all three. This is
+      // the assertion the issue asks for: not "it fits" but "nothing
+      // was dropped to make it fit".
+      expect([...fit.buttons, ...fit.menu].sort()).toEqual([...ACTIONS].sort());
+    });
+  }
+
+  /**
+   * The title gives way before an action does.
+   *
+   * Once the heading can ellipsis it absorbs the pressure, and
+   * `scrollWidth` then reports a header that fits perfectly while the
+   * heading reads "Playlis…" — this issue's own failure mode moved from
+   * the button to the title, and invisible to exactly the measurement
+   * that missed it the first time. At the desktop sizes there is always
+   * an action to collapse instead.
+   */
+  test('does not truncate the heading to keep a button', async ({ app }) => {
+    for (const vp of VIEWPORTS.slice(0, 2)) {
+      await app.setViewportSize({ width: vp.width, height: vp.height });
+
+      await expect
+        .poll(async () => (await headerFit(app))?.titleTruncated)
+        .toBe(false);
+    }
+  });
+
+  /**
+   * Asserted through the accessibility tree, never a shadow query. An
+   * overflow menu is exactly the shape that grows a nameless control,
+   * and this repo has shipped one four times — most recently the
+   * queue's own close button.
+   */
+  test('the overflow is a named control that opens a named menu', async ({
+    app,
+  }) => {
+    await app.setViewportSize({ width: 900, height: 600 });
+
+    const more = app.getByRole('button', { name: 'More actions' });
+
+    await expect(more).toBeVisible();
+    await expect(more).toHaveAttribute('aria-expanded', 'false');
+
+    await more.click();
+
+    await expect(more).toHaveAttribute('aria-expanded', 'true');
+
+    const menu = app.getByRole('menu', { name: 'More actions' });
+
+    await expect(menu).toBeVisible();
+
+    // Collapsed at 900×600: Import (lowest priority) and New Smart
+    // Playlist. New Playlist stays a button because it is the drop
+    // target, and a closed menu cannot be one.
+    await expect(
+      menu.getByRole('menuitem', { name: 'Import' }),
+    ).toBeVisible();
+    await expect(
+      app.getByRole('button', { name: 'New Playlist', exact: true }),
+    ).toBeVisible();
+  });
+
+  /**
+   * The phone case is the original report. Every action is in the menu
+   * at 390px, and the menu is reachable by name — which is the whole of
+   * "these need to be reachable in a sensible way".
+   */
+  test('offers every action from the menu on a phone', async ({ app }) => {
+    await app.setViewportSize({ width: 390, height: 780 });
+
+    const more = app.getByRole('button', { name: 'More actions' });
+
+    await expect(more).toBeVisible();
+    await more.click();
+
+    const menu = app.getByRole('menu', { name: 'More actions' });
+
+    for (const label of ACTIONS) {
+      await expect(menu.getByRole('menuitem', { name: label })).toBeVisible();
+    }
+  });
+
+  /**
+   * Escape closes it and focus goes back to the trigger — `MenuKeyboard`
+   * is shared with every other menu in the app precisely so this is not
+   * a second keyboard model, and this is what proves it was wired up
+   * rather than merely imported.
+   */
+  test('takes the keyboard, and gives it back', async ({ app }) => {
+    await app.setViewportSize({ width: 900, height: 600 });
+
+    const more = app.getByRole('button', { name: 'More actions' });
+
+    await more.click();
+
+    const menu = app.getByRole('menu', { name: 'More actions' });
+
+    await expect(menu).toBeVisible();
+
+    // The first item takes focus on open. `wa-dropdown-item` sets its
+    // own role in its own first update, so this is polled rather than
+    // read: a query at the host's updateComplete finds nothing, which
+    // reads exactly like a menu that refused to take focus.
+    await expect
+      .poll(async () =>
+        app.evaluate(() => {
+          // Stops where `MenuKeyboard`'s own `deepActiveElement` stops:
+          // on the *host* whose shadow root has no active element.
+          // Descending unconditionally lands inside the focused
+          // `wa-dropdown-item`'s own shadow root, where nothing is
+          // focused — which reads exactly like a menu that refused the
+          // keyboard, on a build where it did not.
+          let el = document.activeElement;
+
+          while (el?.shadowRoot?.activeElement) el = el.shadowRoot.activeElement;
+
+          return el?.textContent?.trim() ?? null;
+        }),
+      )
+      .toBe('Import');
+
+    await app.keyboard.press('Escape');
+
+    await expect(more).toHaveAttribute('aria-expanded', 'false');
+    await expect(more).toBeFocused();
+  });
+
+  /**
+   * New Playlist is a drop target, and declaring it as data must not
+   * take that away — which is why a `PageAction` carries the drop
+   * handlers rather than the header owning a notion of dropping.
+   *
+   * Nothing covered this before, in either tier, and it is the one
+   * behaviour the migration could plausibly have destroyed silently:
+   * dragging still *looks* fine against a button that no longer
+   * accepts anything.
+   */
+  test('New Playlist still accepts a dropped track', async ({ app }) => {
+    await app.setViewportSize({ width: 1280, height: 800 });
+
+    const button = app.getByRole('button', {
+      name: 'New Playlist',
+      exact: true,
+    });
+
+    await expect(button).toBeVisible();
+
+    const result = await app.evaluate(async () => {
+      const view = document.querySelector(
+        '[data-testid="main-content"] playlist-view',
+      )!;
+      const target = view.shadowRoot!
+        .querySelector('page-header')!
+        .shadowRoot!.querySelector('[data-testid="page-action-new-playlist"]')!;
+
+      const data = new DataTransfer();
+
+      data.setData(
+        'application/x-yj-tracks',
+        JSON.stringify({ filePaths: ['/tmp/dropped.mp3'] }),
+      );
+
+      const fire = (type: string) =>
+        target.dispatchEvent(
+          new DragEvent(type, {
+            bubbles: true,
+            cancelable: true,
+            dataTransfer: data,
+          }),
+        );
+
+      fire('dragover');
+      await new Promise((r) => setTimeout(r, 50));
+
+      // The affordance is the host's state reaching the header's
+      // button, which is the half a plain handler call would not prove.
+      const highlighted = target.classList.contains('drag-over');
+
+      fire('drop');
+      await new Promise((r) => setTimeout(r, 200));
+
+      return {
+        highlighted,
+        opened: view.shadowRoot!.querySelector('.create-form') !== null,
+      };
+    });
+
+    expect(result).toEqual({ highlighted: true, opened: true });
+
+    // Leave the view as it was found.
+    await app.keyboard.press('Escape');
+  });
+
+  /**
+   * An action given back when the window widens again. The collapsed
+   * set is a function of the current width and not of how it got there
+   * — a rule that only ever *added* to it would never widen.
+   */
+  test('gives the buttons back when the window grows', async ({ app }) => {
+    await app.setViewportSize({ width: 390, height: 780 });
+
+    await expect.poll(async () => (await headerFit(app))?.buttons).toEqual([]);
+
+    await app.setViewportSize({ width: 1440, height: 900 });
+
+    await expect
+      .poll(async () => (await headerFit(app))?.buttons)
+      .toEqual(ACTIONS);
+    await expect.poll(async () => (await headerFit(app))?.menu).toEqual([]);
+  });
+});
diff --git a/frontend/src/assets/icons/fa/solid/ellipsis.svg b/frontend/src/assets/icons/fa/solid/ellipsis.svg
new file mode 100644
index 0000000..01d5813
--- /dev/null
+++ b/frontend/src/assets/icons/fa/solid/ellipsis.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 7.3.1 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2026 Fonticons, Inc. --><path fill="currentColor" d="M0 256a56 56 0 1 1 112 0 56 56 0 1 1 -112 0zm168 0a56 56 0 1 1 112 0 56 56 0 1 1 -112 0zm224-56a56 56 0 1 1 0 112 56 56 0 1 1 0-112z"/></svg>
\ No newline at end of file
diff --git a/frontend/src/components/downloads-view/downloads-view.ts b/frontend/src/components/downloads-view/downloads-view.ts
index 43441eb..626e9a0 100644
--- a/frontend/src/components/downloads-view/downloads-view.ts
+++ b/frontend/src/components/downloads-view/downloads-view.ts
@@ -3,6 +3,7 @@ import { customElement, state } from 'lit/decorators.js';
 import '@awesome.me/webawesome/dist/components/icon/icon.js';
 import '@awesome.me/webawesome/dist/components/button/button.js';
 import '@components/page-header/page-header';
+import type { PageAction } from '@components/page-header/page-header';
 import { designTokens } from '../../styles/tokens.css';
 import { downloadStore, stateLabel } from '@store/download-store';
 import type { Request, RequestSummary, DownloadView as DownloadRecord } from '@store/download-store';
@@ -246,23 +247,23 @@ export class DownloadsView extends ViewLifecycleMixin(LitElement) {
 
     override render() {
         return html`
-            <page-header heading="Downloads">
-                ${this.tab === 'requests'
-                    ? html`
-                          <wa-button
-                              slot="actions"
-                              size="small"
-                              appearance="outlined"
-                              ?disabled=${this.checking}
-                              title="Search every download client for everything on this list right now, instead of waiting for the next scheduled check"
-                              @click=${() => void this.checkNow()}
-                          >
-                              <wa-icon slot="start" name="rotate"></wa-icon>
-                              ${this.checking ? 'Searching…' : 'Check now'}
-                          </wa-button>
-                      `
-                    : nothing}
-            </page-header>
+            <page-header
+                heading="Downloads"
+                .actions=${this.tab === 'requests'
+                    ? ([
+                          {
+                              id: 'check-now',
+                              label: this.checking
+                                  ? 'Searching\u2026'
+                                  : 'Check now',
+                              icon: 'rotate',
+                              disabled: this.checking,
+                              title: 'Search every download client for everything on this list right now, instead of waiting for the next scheduled check',
+                              onSelect: () => void this.checkNow(),
+                          },
+                      ] satisfies PageAction[])
+                    : []}
+            ></page-header>
 
             <p class="subtitle">
                 Music you have requested, and the download attempts that
diff --git a/frontend/src/components/home-view/home-view.ts b/frontend/src/components/home-view/home-view.ts
index fbef07b..816b90d 100644
--- a/frontend/src/components/home-view/home-view.ts
+++ b/frontend/src/components/home-view/home-view.ts
@@ -1,8 +1,9 @@
 import { LitElement, html, css, nothing } from 'lit';
 import { customElement, state } from 'lit/decorators.js';
 import '@awesome.me/webawesome/dist/components/icon/icon.js';
-import '@awesome.me/webawesome/dist/components/button/button.js';
 import { GetShelves } from '@go/home/service.js';
+import { ICON_SHUFFLE } from '@utils/icon-language';
+import type { PageAction } from '@components/page-header/page-header';
 import { GetAlbumTracks } from '@go/library/library.js';
 import type * as home from '@go/home/models.js';
 import type * as library from '@go/library/models.js';
@@ -260,23 +261,24 @@ export class HomeView extends ViewLifecycleMixin(LitElement) {
 
     override render() {
         return html`
-            <page-header heading="Home">
-                <!-- "Shuffle" alone was two different controls with one
-                     name: this one and the transport's shuffle mode.
-                     They were never on screen together until the app
-                     started landing on Home (H-8), and a cached view is
-                     in the accessibility tree either way. -->
-                <wa-button
-                    slot="actions"
-                    size="small"
-                    appearance="plain"
-                    title="Reshuffle the suggestions"
-                    @click=${() => void this.load()}
-                >
-                    <wa-icon slot="start" name="shuffle"></wa-icon>
-                    Shuffle suggestions
-                </wa-button>
-            </page-header>
+            <page-header
+                heading="Home"
+                .actions=${[
+                    {
+                        // "Shuffle" alone was two different controls
+                        // with one name: this one and the transport's
+                        // shuffle mode. They were never on screen
+                        // together until the app started landing on
+                        // Home (H-8), and a cached view is in the
+                        // accessibility tree either way.
+                        id: 'shuffle-suggestions',
+                        label: 'Shuffle suggestions',
+                        icon: ICON_SHUFFLE,
+                        title: 'Reshuffle the suggestions',
+                        onSelect: () => void this.load(),
+                    },
+                ] satisfies PageAction[]}
+            ></page-header>
             <p class="lede">Somewhere to start listening.</p>
             ${this.renderBody()}
         `;
diff --git a/frontend/src/components/page-header/page-header.ts b/frontend/src/components/page-header/page-header.ts
index 06eda0e..58a0da0 100644
--- a/frontend/src/components/page-header/page-header.ts
+++ b/frontend/src/components/page-header/page-header.ts
@@ -1,8 +1,16 @@
 import { LitElement, html, css, nothing } from 'lit';
-import { customElement, property } from 'lit/decorators.js';
+import { customElement, property, query, state } from 'lit/decorators.js';
 import '@awesome.me/webawesome/dist/components/icon/icon.js';
+import '@awesome.me/webawesome/dist/components/popup/popup.js';
+import '@awesome.me/webawesome/dist/components/dropdown-item/dropdown-item.js';
+import type WaPopup from '@awesome.me/webawesome/dist/components/popup/popup.js';
 
 import { designTokens } from '../../styles/tokens.css';
+import {
+    MenuKeyboard,
+    contextMenuStyles,
+} from '../../utils/context-menu-controller';
+import { ICON_MORE_ACTIONS } from '../../utils/icon-language';
 
 /**
  * The one arrangement every primary view uses to say what it is.
@@ -18,6 +26,19 @@ import { designTokens } from '../../styles/tokens.css';
  * Title, count, sort, actions — in that order, in one component, so a
  * new view gets the shape by using it rather than by copying whichever
  * neighbour it happened to read.
+ *
+ * **Actions are data, and `<slot name="actions">` is the exception.**
+ * Playlists' three buttons totalled 390px inside a header that gets
+ * 700px at 900×600 and clipped "New Smart Playlist" to 114 of its 162
+ * (#69) — a live defect at a size the app promises, against plan 018's
+ * *no action is ever unreachable at any supported size*. The header
+ * cannot fix that for slotted markup: it cannot move another
+ * component's light-DOM children into a dropdown and keep their
+ * behaviour, and arbitrary markup offers nothing generic to render as
+ * a menu item. So a host declares `PageAction[]` and the header picks
+ * the rendering. The slot survives for markup a data list genuinely
+ * cannot express, at the stated cost that **a slotted action does not
+ * collapse** and must therefore fit at 800×600.
  */
 
 export interface SortOption {
@@ -27,6 +48,50 @@ export interface SortOption {
 
 export type SortDirection = 'asc' | 'desc';
 
+/**
+ * An action that only makes sense while it is a button.
+ *
+ * A drop target is the case: you cannot drag a track onto a closed
+ * menu, so the affordance is absent from the overflow rather than
+ * approximated there. The header wires these onto the button it
+ * renders and owns none of them — the same division the sort control
+ * already lives by.
+ */
+export interface PageActionDrop {
+    /** True while an acceptable payload is over the button. */
+    active?: boolean;
+    onDragOver: (e: DragEvent) => void;
+    onDragLeave: (e: DragEvent) => void;
+    onDrop: (e: DragEvent) => void;
+}
+
+/**
+ * One thing a view can do, as data rather than as markup.
+ *
+ * `<slot name="actions">` cannot be collapsed, and that is a fact about
+ * the API rather than an effort estimate (#69): a component cannot move
+ * another component's light-DOM children into a dropdown and keep their
+ * behaviour, and there is nothing generic in arbitrary markup to render
+ * as a menu item. Declaring an action instead is what lets the header
+ * choose between the two renderings.
+ */
+export interface PageAction {
+    id: string;
+    label: string;
+    /** From `utils/icon-language`, never a literal. */
+    icon: string;
+    onSelect: () => void;
+    /**
+     * Higher survives longer. The lowest collapses first, ties broken
+     * by declaration order from the right, so a host that says nothing
+     * gets "the last one written goes first".
+     */
+    priority?: number;
+    disabled?: boolean;
+    title?: string;
+    drop?: PageActionDrop;
+}
+
 @customElement('page-header')
 export class PageHeader extends LitElement {
     /**
@@ -80,8 +145,82 @@ export class PageHeader extends LitElement {
     @property({ type: Boolean })
     busy = false;
 
+    /**
+     * What this view can do, in the order it wants them shown.
+     *
+     * The header decides what *fits*; the host decides what *happens*.
+     * That is the rule the sort control already lives by — it asks for
+     * a sort rather than performing one — and actions follow it, which
+     * is why an action carries a handler rather than the header
+     * carrying a verb it would have to interpret.
+     */
+    @property({ attribute: false })
+    actions: PageAction[] = [];
+
+    /** Action ids currently in the overflow menu. Derived, never set by a host. */
+    @state()
+    private collapsed: ReadonlySet<string> = new Set();
+
+    @state()
+    private menuOpen = false;
+
+    @query('.page-header')
+    private headerEl?: HTMLElement;
+
+    @query('.more-button')
+    private moreButton?: HTMLButtonElement;
+
+    @query('#page-header-overflow')
+    private menuPanel?: HTMLElement;
+
+    @query('wa-popup')
+    private popup?: WaPopup;
+
+    private menuKeyboard = new MenuKeyboard(() => this.closeMenu());
+
+    private resizeObserver?: ResizeObserver;
+
+    /**
+     * Whether the outside-click listener is attached.
+     *
+     * A `removeEventListener` with no matching `add` is not harmless
+     * here: `view-lifecycle.test.ts` counts document listeners across a
+     * view's life and an unconditional detach on disconnect shows up as
+     * `held: -1`, which is the same accounting that would hide a real
+     * leak in the other direction.
+     */
+    private outsideCloseAttached = false;
+
+    /**
+     * What the last fit was measured against.
+     *
+     * `updated()` runs on every pass, so it has to say what it depends
+     * on or it re-measures — and a measurement here forces synchronous
+     * layout. Width changes arrive through the ResizeObserver; this key
+     * covers everything *else* in the flex row that can change how much
+     * of it the actions are left.
+
+     */
+    private lastFitKey = '';
+
+    override connectedCallback(): void {
+        super.connectedCallback();
+
+        this.resizeObserver = new ResizeObserver(() => this.measureFit());
+        this.resizeObserver.observe(this);
+    }
+
+    override disconnectedCallback(): void {
+        super.disconnectedCallback();
+
+        this.resizeObserver?.disconnect();
+        this.resizeObserver = undefined;
+        this.detachOutsideClose();
+    }
+
     static override styles = [
         designTokens,
+        contextMenuStyles,
         css`
             :host {
                 display: block;
@@ -96,12 +235,26 @@ export class PageHeader extends LitElement {
                 border-bottom: 1px solid var(--yj-border-subtle, #333);
             }
 
+            /* The title gives way before an action does.
+
+               Everything in this row was flex-shrink: 0, so whatever
+               came last lost — and the actions come last, which is how
+               the "More actions" button ended up 76px off the right
+               edge of a 320px viewport with every action already
+               collapsed into it. The title is the one thing here the
+               navigation also says (the sidebar item is selected, the
+               bottom-nav tab is current), so it is the cheapest thing
+               to truncate; the count, the sort and the actions are each
+               the only place they are said. */
             h1 {
                 margin: 0;
                 font-size: var(--yj-text-xl, 18px);
                 font-weight: 600;
                 color: var(--yj-text-primary, #fff);
                 white-space: nowrap;
+                overflow: hidden;
+                text-overflow: ellipsis;
+                min-width: 0;
             }
 
             .count {
@@ -191,6 +344,98 @@ export class PageHeader extends LitElement {
             ::slotted(*) {
                 flex-shrink: 0;
             }
+
+            .actions {
+                display: flex;
+                align-items: center;
+                gap: 8px;
+                flex-shrink: 0;
+            }
+
+            .action,
+            .more-button {
+                background: none;
+                border: 1px solid var(--yj-border-subtle, #555);
+                border-radius: 4px;
+                color: var(--yj-text-primary, #fff);
+                padding: 6px 12px;
+                font-size: var(--yj-text-md, 13px);
+                font-family: inherit;
+                cursor: pointer;
+                display: flex;
+                align-items: center;
+                gap: 6px;
+                white-space: nowrap;
+                flex-shrink: 0;
+            }
+
+            .more-button {
+                padding: 6px 10px;
+            }
+
+            /* The display: flex above outranks the UA stylesheet's
+               rule for [hidden], and hiding is how an action
+               collapses. (No backticks in here: one ends the css
+               literal, and what you get is "css(...) is not a
+               function" a long way from the cause.) */
+            .action[hidden],
+            .more-button[hidden] {
+                display: none;
+            }
+
+            .action:hover,
+            .more-button:hover,
+            .action.drag-over {
+                border-color: var(--yj-accent, #ffd43b);
+                color: var(--yj-accent-text, #ffd43b);
+            }
+
+            .action.drag-over {
+                background-color: var(
+                    --yj-accent-bg-strong,
+                    rgba(255, 212, 59, 0.15)
+                );
+            }
+
+            .action:disabled {
+                opacity: 0.5;
+                cursor: default;
+            }
+
+            .action:focus-visible,
+            .more-button:focus-visible {
+                outline: 2px solid var(--yj-accent, #ffd43b);
+                outline-offset: -1px;
+            }
+
+            wa-popup {
+                z-index: 200;
+            }
+
+            /* A component states what it drops at phone width itself,
+               in its own stylesheet, because a media query inside a
+               shadow root is answered by the viewport and the shell
+               cannot reach in. Here that is one word: the sort control
+               is 172px of a 320px header, and "Sort:" is ~40px of it
+               for a label the adjacent direction arrow already implies.
+               It stays in the accessibility tree — it is the select's
+               accessible name, so hiding it outright would rename the
+               control to nothing — which is config-field's bug, one
+               component over. clip-path rather than display: none for
+               the reason styles/sr-only.css.ts gives. */
+            @media (max-width: 599px) {
+                .sort-label {
+                    position: absolute;
+                    width: 1px;
+                    height: 1px;
+                    margin: -1px;
+                    padding: 0;
+                    overflow: hidden;
+                    clip-path: inset(50%);
+                    white-space: nowrap;
+                    border: 0;
+                }
+            }
         `,
     ];
 
@@ -212,11 +457,293 @@ export class PageHeader extends LitElement {
                 ${this.renderCount()}
                 <div class="spacer"></div>
                 ${this.renderScope()} ${this.renderSort()}
+                ${this.renderActions()}
                 <slot name="actions"></slot>
             </header>
         `;
     }
 
+    protected override updated(): void {
+        const key = [
+            this.heading,
+            this.count,
+            this.countNoun,
+            this.countPlural,
+            this.searchTerm,
+            this.sortOptions.length,
+            this.sortField,
+            this.sortDirection,
+            this.busy,
+            this.actions.map((a) => `${a.id}:${a.label}:${a.disabled ?? false}`).join(','),
+        ].join('|');
+
+        if (key === this.lastFitKey) return;
+
+        this.lastFitKey = key;
+        this.measureFit();
+    }
+
+    // =================================================================
+    // What fits
+    // =================================================================
+
+    /**
+     * Decide which actions are buttons and which are menu items.
+     *
+     * Two things about the shape of this are load-bearing.
+     *
+     * **Every pass starts from all-visible**, so the collapsed set is a
+     * pure function of the current width rather than of the order the
+     * widths arrived in. A rule that only ever *added* to the set would
+     * never give an action back when the window grew, and one that
+     * adjusted by a step would need a hysteresis band to stop it
+     * oscillating on the pixel where a button exactly fits.
+     *
+     * **It flips `hidden` on the rendered nodes rather than re-rendering
+     * between steps.** Reading `scrollWidth` forces layout, which is the
+     * point; awaiting a Lit update between steps instead would let the
+     * intermediate all-visible state paint, so the fix would flash the
+     * overflow it exists to prevent. The reactive state is set once, at
+     * the end, and the next render agrees with what was measured.
+     *
+     * The budget is the *header's* overflow and not the actions row's,
+     * because the count and the sort control are `flex-shrink: 0` and
+     * are therefore competing for the same width — only `.scope` gives
+     * way, which is what it has an ellipsis for.
+     */
+    private measureFit(): void {
+        const header = this.headerEl;
+
+        if (!header) return;
+
+        if (this.actions.length === 0) {
+            this.commitCollapsed(new Set());
+
+            return;
+        }
+
+        const buttons = new Map<string, HTMLElement>();
+
+        for (const el of this.renderRoot.querySelectorAll<HTMLElement>(
+            '[data-action-id]',
+        )) {
+            const id = el.dataset['actionId'];
+
+            if (id !== undefined) buttons.set(id, el);
+        }
+
+        const more = this.moreButton;
+        const title = this.renderRoot.querySelector('h1');
+
+        /**
+         * Nothing is clipped — which is not the same as the header not
+         * overflowing, and the difference is a trap worth naming.
+         *
+         * Once the title can ellipsis, it absorbs the pressure and
+         * `scrollWidth` reports a header that fits perfectly while the
+         * heading reads "Playlis…". That is this issue's own failure
+         * mode moved from the button to the title, and it is invisible
+         * to exactly the same measurement that missed it the first time.
+         * So the title's own truncation counts as not fitting, and
+         * collapsing an action is tried before the title gives way.
+         */
+        const fits = () =>
+            header.scrollWidth <= header.clientWidth &&
+            (title === null || title.scrollWidth <= title.clientWidth + 1);
+
+        for (const el of buttons.values()) el.hidden = false;
+
+        if (more) more.hidden = true;
+
+        const collapsed = new Set<string>();
+
+        if (!fits()) {
+            if (more) more.hidden = false;
+
+            for (const action of this.collapseOrder()) {
+                collapsed.add(action.id);
+
+                const el = buttons.get(action.id);
+
+                if (el) el.hidden = true;
+
+                if (fits()) break;
+            }
+        }
+
+        this.commitCollapsed(collapsed);
+    }
+
+    /** Lowest priority first; ties broken from the right. */
+    private collapseOrder(): PageAction[] {
+        return this.actions
+            .map((action, index) => ({ action, index }))
+            .sort(
+                (a, b) =>
+                    (a.action.priority ?? 0) - (b.action.priority ?? 0) ||
+                    b.index - a.index,
+            )
+            .map(({ action }) => action);
+    }
+
+    private commitCollapsed(next: Set<string>): void {
+        const same =
+            next.size === this.collapsed.size &&
+            [...next].every((id) => this.collapsed.has(id));
+
+        if (same) return;
+
+        this.collapsed = next;
+
+        // Nothing left to show in it. Closing rather than leaving an
+        // empty menu open is the same rule the shelves follow.
+        if (next.size === 0 && this.menuOpen) this.closeMenu();
+    }
+
+    // =================================================================
+    // Rendering
+    // =================================================================
+
+    private renderActions() {
+        if (this.actions.length === 0) return nothing;
+
+        const overflowed = this.actions.filter((a) => this.collapsed.has(a.id));
+
+        return html`
+            <div class="actions">
+                ${this.actions.map((a) => this.renderActionButton(a))}
+                <wa-popup
+                    placement="bottom-end"
+                    flip
+                    shift
+                    .active=${this.menuOpen}
+                >
+                    <button
+                        slot="anchor"
+                        class="more-button"
+                        type="button"
+                        data-testid="page-actions-more"
+                        aria-label="More actions"
+                        aria-haspopup="menu"
+                        aria-expanded=${this.menuOpen ? 'true' : 'false'}
+                        aria-controls="page-header-overflow"
+                        ?hidden=${overflowed.length === 0}
+                        @click=${this.onMoreClick}
+                    >
+                        <wa-icon name=${ICON_MORE_ACTIONS}></wa-icon>
+                    </button>
+                    <div
+                        id="page-header-overflow"
+                        class="context-menu-panel"
+                        role="menu"
+                        aria-label="More actions"
+                    >
+                        ${overflowed.map(
+                            (a) => html`
+                                <wa-dropdown-item
+                                    ?disabled=${a.disabled ?? false}
+                                    @click=${() => this.onActionSelect(a)}
+                                >
+                                    <wa-icon
+                                        slot="icon"
+                                        name=${a.icon}
+                                    ></wa-icon>
+                                    ${a.label}
+                                </wa-dropdown-item>
+                            `,
+                        )}
+                    </div>
+                </wa-popup>
+            </div>
+        `;
+    }
+
+    private renderActionButton(a: PageAction) {
+        const drop = a.drop;
+
+        return html`
+            <button
+                class="action ${drop?.active === true ? 'drag-over' : ''}"
+                type="button"
+                data-action-id=${a.id}
+                data-testid=${`page-action-${a.id}`}
+                title=${a.title ?? nothing}
+                ?disabled=${a.disabled ?? false}
+                ?hidden=${this.collapsed.has(a.id)}
+                @click=${() => a.onSelect()}
+                @dragover=${(e: DragEvent) => drop?.onDragOver(e)}
+                @dragleave=${(e: DragEvent) => drop?.onDragLeave(e)}
+                @drop=${(e: DragEvent) => drop?.onDrop(e)}
+            >
+                <wa-icon name=${a.icon}></wa-icon>
+                ${a.label}
+            </button>
+        `;
+    }
+
+    // =================================================================
+    // The overflow menu
+    // =================================================================
+
+    private onActionSelect(a: PageAction): void {
+        if (a.disabled === true) return;
+
+        this.closeMenu();
+        a.onSelect();
+    }
+
+    private onMoreClick = (): void => {
+        if (this.menuOpen) {
+            this.closeMenu();
+
+            return;
+        }
+
+        this.menuOpen = true;
+
+        void this.updateComplete.then(() => {
+            if (!this.menuOpen) return;
+
+            this.popup?.reposition();
+            this.menuKeyboard.open(this.menuPanel ?? null, this.moreButton);
+            this.attachOutsideClose();
+        });
+    };
+
+    private closeMenu(): void {
+        if (!this.menuOpen) return;
+
+        this.detachOutsideClose();
+        this.menuKeyboard.close();
+        this.menuOpen = false;
+    }
+
+    /**
+     * A click anywhere else closes it. `composedPath` rather than
+     * `contains`, because the trigger and the panel are both inside
+     * this shadow root and a click retargets at the host.
+     */
+    private onOutsideDown = (e: Event): void => {
+        if (e.composedPath().includes(this.menuPanel as EventTarget)) return;
+        if (e.composedPath().includes(this.moreButton as EventTarget)) return;
+
+        this.closeMenu();
+    };
+
+    private attachOutsideClose(): void {
+        if (this.outsideCloseAttached) return;
+
+        this.outsideCloseAttached = true;
+        document.addEventListener('mousedown', this.onOutsideDown, true);
+    }
+
+    private detachOutsideClose(): void {
+        if (!this.outsideCloseAttached) return;
+
+        this.outsideCloseAttached = false;
+        document.removeEventListener('mousedown', this.onOutsideDown, true);
+    }
+
     private renderCount() {
         if (this.count === null) return nothing;
 
@@ -258,7 +785,10 @@ export class PageHeader extends LitElement {
         if (this.sortOptions.length === 1) {
             return html`
                 <div class="sort">
-                    <span>Sort: ${this.sortOptions[0]?.label}</span>
+                    <span
+                        ><span class="sort-label">Sort: </span
+                        >${this.sortOptions[0]?.label}</span
+                    >
                     ${this.renderDirectionButton(ascending)}
                 </div>
             `;
@@ -267,7 +797,7 @@ export class PageHeader extends LitElement {
         return html`
             <div class="sort">
                 <label>
-                    Sort:
+                    <span class="sort-label">Sort:</span>
                     <select
                         data-testid="page-sort"
                         .value=${this.sortField}
diff --git a/frontend/src/components/playlist-view/playlist-view.ts b/frontend/src/components/playlist-view/playlist-view.ts
index 8ffe1cd..0192d12 100644
--- a/frontend/src/components/playlist-view/playlist-view.ts
+++ b/frontend/src/components/playlist-view/playlist-view.ts
@@ -40,7 +40,10 @@ import type { DuplicateTracksDialog } from '@components/duplicate-tracks-dialog/
 import {
     ICON_NEW,
     ICON_PLAYLIST,
+    ICON_SMART_PLAYLIST,
 } from '@utils/icon-language';
+import '@components/page-header/page-header';
+import type { PageAction } from '@components/page-header/page-header';
 
 const SCROLL_DEBOUNCE_MS = 100;
 
@@ -194,11 +197,6 @@ export class PlaylistView extends ViewLifecycleMixin(LitElement) {
             contain: layout style;
         }
 
-        .header-actions {
-            display: flex;
-            gap: 8px;
-        }
-
         .header-spinner {
             display: inline-block;
             width: 14px;
@@ -209,33 +207,6 @@ export class PlaylistView extends ViewLifecycleMixin(LitElement) {
             animation: spin 0.6s linear infinite;
         }
 
-        .new-playlist-button {
-            background: none;
-            border: 1px solid var(--yj-border-subtle, #555);
-            border-radius: 4px;
-            color: var(--yj-text-primary, #fff);
-            padding: 6px 12px;
-            font-size: 13px;
-            cursor: pointer;
-            display: flex;
-            align-items: center;
-            gap: 6px;
-            font-family: inherit;
-        }
-
-        .new-playlist-button:hover,
-        .new-playlist-button.drag-over {
-            border-color: var(--yj-accent, #ffd43b);
-            color: var(--yj-accent-text, #ffd43b);
-        }
-
-        .new-playlist-button.drag-over {
-            background-color: var(
-                --yj-accent-bg-strong,
-                rgba(255, 212, 59, 0.15)
-            );
-        }
-
         .create-form {
             display: flex;
             align-items: center;
@@ -455,25 +426,6 @@ export class PlaylistView extends ViewLifecycleMixin(LitElement) {
             min-width: 0;
         }
 
-        .import-button {
-            background: none;
-            border: 1px solid var(--yj-border-subtle, #555);
-            border-radius: 4px;
-            color: var(--yj-text-primary, #fff);
-            padding: 6px 12px;
-            font-size: 13px;
-            cursor: pointer;
-            display: flex;
-            align-items: center;
-            gap: 6px;
-            font-family: inherit;
-        }
-
-        .import-button:hover {
-            border-color: var(--yj-accent, #ffd43b);
-            color: var(--yj-accent-text, #ffd43b);
-        }
-
         .import-error {
             padding: 0.5em 0.75em;
             margin: 0.5em 16px 0;
@@ -1022,10 +974,11 @@ export class PlaylistView extends ViewLifecycleMixin(LitElement) {
     ) => {
         const related =
             e.relatedTarget as Node | null;
-        const btn =
-            this.shadowRoot?.querySelector(
-                '.new-playlist-button',
-            );
+        // The button the event was bound to, rather than a selector for
+        // it: `page-header` renders it now, so it is not in this shadow
+        // root at all and the old `.new-playlist-button` lookup would
+        // find nothing and leave the highlight stuck on.
+        const btn = e.currentTarget as Element | null;
 
         if (btn && !btn.contains(related)) {
             this.dragOverNewButton = false;
@@ -1470,6 +1423,49 @@ export class PlaylistView extends ViewLifecycleMixin(LitElement) {
         this.saveSortPreferences();
     };
 
+    /**
+     * The three things this page can do, as data.
+     *
+     * The priority order is what #69's Direction asks for and it is
+     * only interesting for one of them: **New Playlist is highest
+     * because it is the drop target**. You cannot drag a track onto a
+     * closed menu, so collapsing it is the one collapse here that
+     * removes a capability rather than relocating it. Import is lowest
+     * because it is the rarest, and at 900×600 it is the only one that
+     * has to go.
+     */
+    private headerActions(): PageAction[] {
+        return [
+            {
+                id: 'import',
+                label: 'Import',
+                icon: 'file-import',
+                priority: 0,
+                onSelect: () => void this.handleImportPlaylist(),
+            },
+            {
+                id: 'new-playlist',
+                label: 'New Playlist',
+                icon: ICON_NEW,
+                priority: 2,
+                onSelect: () => this.handleNewPlaylistClick(),
+                drop: {
+                    active: this.dragOverNewButton,
+                    onDragOver: this.onNewButtonDragOver,
+                    onDragLeave: this.onNewButtonDragLeave,
+                    onDrop: this.onNewButtonDrop,
+                },
+            },
+            {
+                id: 'new-smart-playlist',
+                label: 'New Smart Playlist',
+                icon: ICON_SMART_PLAYLIST,
+                priority: 1,
+                onSelect: () => this.handleNewSmartPlaylistClick(),
+            },
+        ];
+    }
+
     override render() {
         return html`
             <page-header
@@ -1484,33 +1480,8 @@ export class PlaylistView extends ViewLifecycleMixin(LitElement) {
                 search-term=${this.searchCtrl.term}
                 ?busy=${this.refreshing}
                 @sort-change=${this.onPageHeaderSort}
+                .actions=${this.headerActions()}
             >
-                <div slot="actions" class="header-actions">
-                    <button
-                        class="import-button"
-                        @click=${this.handleImportPlaylist}
-                    >
-                        <wa-icon name="file-import"></wa-icon>
-                        Import
-                    </button>
-                    <button
-                        class="new-playlist-button ${this.dragOverNewButton ? 'drag-over' : ''}"
-                        @click=${this.handleNewPlaylistClick}
-                        @dragover=${this.onNewButtonDragOver}
-                        @dragleave=${this.onNewButtonDragLeave}
-                        @drop=${this.onNewButtonDrop}
-                    >
-                        <wa-icon name=${ICON_NEW}></wa-icon>
-                        New Playlist
-                    </button>
-                    <button
-                        class="new-playlist-button"
-                        @click=${this.handleNewSmartPlaylistClick}
-                    >
-                        <wa-icon name="filter"></wa-icon>
-                        New Smart Playlist
-                    </button>
-                </div>
             </page-header>
 
             ${this.importError
@@ -1765,7 +1736,7 @@ export class PlaylistView extends ViewLifecycleMixin(LitElement) {
                         : entry.summary.IsSmart
                           ? html`<wa-icon
                                 class="playlist-icon"
-                                name="filter"
+                                name=${ICON_SMART_PLAYLIST}
                             ></wa-icon>`
                           : nothing}
                     ${isRenaming
diff --git a/frontend/src/components/smart-playlist-details/smart-playlist-details.ts b/frontend/src/components/smart-playlist-details/smart-playlist-details.ts
index 3b742b7..d86101b 100644
--- a/frontend/src/components/smart-playlist-details/smart-playlist-details.ts
+++ b/frontend/src/components/smart-playlist-details/smart-playlist-details.ts
@@ -64,6 +64,7 @@ import { list } from '@utils/binding';
 import {
     ICON_PLAYLIST,
     ICON_QUEUE,
+    ICON_SMART_PLAYLIST,
 } from '@utils/icon-language';
 
 
@@ -1214,7 +1215,7 @@ export class SmartPlaylistDetails
                     <wa-icon name="arrow-left"></wa-icon>
                 </button>
                 <div class="playlist-avatar">
-                    <wa-icon name="filter"></wa-icon>
+                    <wa-icon name=${ICON_SMART_PLAYLIST}></wa-icon>
                 </div>
                 <div class="playlist-info">
                     <h1
diff --git a/frontend/src/icons/names.txt b/frontend/src/icons/names.txt
index 309e42b..f0eba3f 100644
--- a/frontend/src/icons/names.txt
+++ b/frontend/src/icons/names.txt
@@ -41,6 +41,7 @@ solid/compact-disc
 solid/copy
 solid/database
 solid/download
+solid/ellipsis
 solid/file-import
 solid/filter
 solid/floppy-disk
diff --git a/frontend/src/utils/icon-language.ts b/frontend/src/utils/icon-language.ts
index e18a646..6efe84d 100644
--- a/frontend/src/utils/icon-language.ts
+++ b/frontend/src/utils/icon-language.ts
@@ -54,6 +54,18 @@ export const ICON_PLAYLIST = 'list';
  */
 export const ICON_NEW = 'plus';
 
+/**
+ * A smart playlist — the rule, and the thing the rule makes.
+ *
+ * Governed for the reason `ICON_AUTOTAG` states: it was already at
+ * three call sites (the Playlists header, the row marker beside a smart
+ * playlist's name, and `smart-playlist-details`'s avatar), and a name
+ * stops being a detail of one component the moment there are two. It is
+ * deliberately *not* `ICON_NEW`, even on the button that makes one:
+ * an icon names the noun it acts on, and the noun here is the rule.
+ */
+export const ICON_SMART_PLAYLIST = 'filter';
+
 /**
  * The request ("want") toggle, as an outline/solid pair.
  *
@@ -100,6 +112,18 @@ export const ICON_AUTOTAG = 'tag';
  */
 export const ICON_DOWNLOADING = 'download';
 
+/**
+ * The rest of what this thing can do.
+ *
+ * `page-header` collapses the actions that do not fit into one menu
+ * behind this, so the glyph has to name *more of the same nouns* rather
+ * than any one of them — which is what an ellipsis is and what `bars`
+ * (the navigation drawer, one component over in `bottom-nav`) is not.
+ * It is deliberately the only meaning it carries: an overflow menu that
+ * shared an icon with a destination would be the `list` problem again.
+ */
+export const ICON_MORE_ACTIONS = 'ellipsis';
+
 /**
  * Take this away.
  *
diff --git a/frontend/test/components/home-view.test.ts b/frontend/test/components/home-view.test.ts
index e2179e1..f25888e 100644
--- a/frontend/test/components/home-view.test.ts
+++ b/frontend/test/components/home-view.test.ts
@@ -7,6 +7,7 @@
  * opening it.
  */
 import { describe, expect, it, beforeEach } from 'vitest';
+import type { LitElement } from 'lit';
 
 import '@components/home-view/home-view';
 import { stub, calls, lastArgs, stubFailure } from '@test/support/harness';
@@ -166,7 +167,17 @@ describe('home view', () => {
 
     const before = calls('home.Service.GetShelves').length;
 
-    shadow<HTMLElement>(el, 'wa-button')!.click();
+    // The action is declared to `page-header` rather than slotted as
+    // markup (#69), so it is a button in *that* shadow root now.
+    const header = shadow<HTMLElement>(el, 'page-header')!;
+
+    await (header as LitElement).updateComplete;
+
+    header.shadowRoot!
+      .querySelector<HTMLButtonElement>(
+        '[data-testid="page-action-shuffle-suggestions"]',
+      )!
+      .click();
     await el.updateComplete;
 
     expect(calls('home.Service.GetShelves').length).toBe(before + 1);
diff --git a/frontend/test/components/icon-language.test.ts b/frontend/test/components/icon-language.test.ts
index cf8367f..831bee7 100644
--- a/frontend/test/components/icon-language.test.ts
+++ b/frontend/test/components/icon-language.test.ts
@@ -44,6 +44,8 @@ const GOVERNED = [
   'regular/bookmark',
   'bars-staggered',
   'tag',
+  'filter',
+  'ellipsis',
 ];
 
 /** The one file allowed to say them, plus its own test. */
diff --git a/frontend/test/components/page-header.test.ts b/frontend/test/components/page-header.test.ts
index 854c14f..a6f5dab 100644
--- a/frontend/test/components/page-header.test.ts
+++ b/frontend/test/components/page-header.test.ts
@@ -9,7 +9,7 @@
  * the thing no assertion can — the header looking wrong.
  */
 import { describe, expect, it } from 'vitest';
-import type { PageHeader } from '@components/page-header/page-header';
+import type { PageAction, PageHeader } from '@components/page-header/page-header';
 
 import '@components/page-header/page-header';
 import { fixture, shadow, shadowAll, update, visual } from '@test/support/render';
@@ -19,6 +19,67 @@ const SORTS = [
   { id: 'tracks', label: 'Tracks' },
 ];
 
+/**
+ * Three actions of the shape that broke: Playlists' own, whose widths
+ * (91 + 122 + 162 = 390px) are what a 700px header could not hold.
+ */
+function playlistActions(seen: string[]): PageAction[] {
+  return [
+    {
+      id: 'import',
+      label: 'Import',
+      icon: 'file-import',
+      priority: 0,
+      onSelect: () => seen.push('import'),
+    },
+    {
+      id: 'new-playlist',
+      label: 'New Playlist',
+      icon: 'plus',
+      priority: 2,
+      onSelect: () => seen.push('new-playlist'),
+    },
+    {
+      id: 'new-smart-playlist',
+      label: 'New Smart Playlist',
+      icon: 'filter',
+      priority: 1,
+      onSelect: () => seen.push('new-smart-playlist'),
+    },
+  ];
+}
+
+/**
+ * Resize and let the fit settle.
+ *
+ * The rule is driven by a ResizeObserver, which delivers before paint
+ * and therefore after the microtask queue an `updateComplete` drains —
+ * so this waits on frames rather than on promises, and then on the
+ * render the measurement asks for.
+ */
+async function widthOf(el: PageHeader, px: number): Promise<void> {
+  el.style.width = `${px}px`;
+
+  for (let frame = 0; frame < 3; frame += 1) {
+    await new Promise((r) => requestAnimationFrame(r));
+    await el.updateComplete;
+  }
+}
+
+/** The labels currently rendered as buttons, in order. */
+function buttons(el: PageHeader): string[] {
+  return shadowAll<HTMLButtonElement>(el, '.action')
+    .filter((b) => !b.hidden)
+    .map((b) => b.textContent?.trim() ?? '');
+}
+
+/** The labels currently in the overflow menu, in order. */
+function menu(el: PageHeader): string[] {
+  return shadowAll(el, '#page-header-overflow wa-dropdown-item').map(
+    (i) => i.textContent?.trim() ?? '',
+  );
+}
+
 describe('<page-header>', () => {
   it('renders the heading as the page\u2019s only h1', async () => {
     const el = await fixture<PageHeader>('page-header', {
@@ -153,6 +214,264 @@ describe('<page-header>', () => {
   });
 });
 
+/**
+ * #69: Playlists slotted three buttons totalling 390px into a header
+ * that gets 700px at 900×600, and "New Smart Playlist" rendered 114 of
+ * its 162. It survived a spec named `layout-overflow` because that one
+ * asserts the *shell* needs no sideways scrolling — clipping inside a
+ * component is invisible to it.
+ *
+ * The header can only fix that for actions it renders itself, which is
+ * why they are data now. These are the assertions about the rule; the
+ * e2e spec is what checks it against the real widths.
+ */
+describe('<page-header> actions', () => {
+  it('renders a declared action, and asks the host to perform it', async () => {
+    // Same division the sort control already lives by: the header
+    // decides what fits, the host decides what happens.
+    const seen: string[] = [];
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      actions: playlistActions(seen),
+    });
+
+    await widthOf(el, 1200);
+
+    expect(buttons(el)).toEqual([
+      'Import',
+      'New Playlist',
+      'New Smart Playlist',
+    ]);
+
+    shadow<HTMLButtonElement>(el, '[data-testid="page-action-import"]')!.click();
+
+    expect(seen).toEqual(['import']);
+  });
+
+  it('hides the overflow trigger while everything fits', async () => {
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      actions: playlistActions([]),
+    });
+
+    await widthOf(el, 1200);
+
+    expect(shadow<HTMLButtonElement>(el, '.more-button')!.hidden).toBe(true);
+    expect(menu(el)).toEqual([]);
+  });
+
+  it('collapses the lowest priority first', async () => {
+    // Import is lowest because it is rarest; New Playlist is highest
+    // because it is the drop target, and a closed menu cannot be one.
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      count: 4,
+      countNoun: 'playlist',
+      sortOptions: SORTS,
+      sortField: 'name',
+      actions: playlistActions([]),
+    });
+
+    // Asserted as the *order* rather than at two chosen widths: which
+    // pixel drops which button depends on the font and on the shell
+    // this tier does not have, and pinning those numbers here would be
+    // a test of the fixture. What the host declares is a sequence.
+    const states: string[][] = [];
+
+    for (let width = 1200; width >= 300; width -= 40) {
+      await widthOf(el, width);
+
+      const now = menu(el);
+      const last = states[states.length - 1];
+
+      if (last === undefined || last.join() !== now.join()) states.push(now);
+    }
+
+    expect(states).toEqual([
+      [],
+      ['Import'],
+      ['Import', 'New Smart Playlist'],
+      ['Import', 'New Playlist', 'New Smart Playlist'],
+    ]);
+
+    // The menu lists them in the host's declared order, not in the
+    // order they happened to collapse — a menu that reshuffles itself
+    // as the window narrows is a menu nobody can learn.
+    expect(buttons(el)).toEqual([]);
+  });
+
+  it('gives an action back when the width returns', async () => {
+    // Every pass starts from all-visible, so the collapsed set is a
+    // function of the current width and not of how it got there. A rule
+    // that only ever added to the set would never widen again.
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      count: 4,
+      countNoun: 'playlist',
+      sortOptions: SORTS,
+      sortField: 'name',
+      actions: playlistActions([]),
+    });
+
+    await widthOf(el, 420);
+
+    expect(buttons(el)).toEqual([]);
+
+    await widthOf(el, 1200);
+
+    expect(menu(el)).toEqual([]);
+    expect(buttons(el)).toEqual([
+      'Import',
+      'New Playlist',
+      'New Smart Playlist',
+    ]);
+  });
+
+  it('collapses an action before it truncates the title', async () => {
+    // The title can ellipsis, which means `scrollWidth` reports a
+    // header that fits perfectly while the heading reads "Playlis…" —
+    // this issue's failure mode moved from the button to the title, and
+    // invisible to the same measurement that missed it the first time.
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      count: 4,
+      countNoun: 'playlist',
+      sortOptions: SORTS,
+      sortField: 'name',
+      actions: playlistActions([]),
+    });
+
+    await widthOf(el, 700);
+
+    const h1 = shadow<HTMLElement>(el, 'h1')!;
+
+    expect(h1.scrollWidth).toBeLessThanOrEqual(h1.clientWidth + 1);
+    expect(menu(el).length).toBeGreaterThan(0);
+  });
+
+  it('names the overflow trigger and says what it controls', async () => {
+    // An overflow menu is exactly the shape that grows a nameless
+    // control, and `aria-controls` cannot name an element that is not
+    // in the DOM — which is why the panel renders unconditionally and
+    // `wa-popup` hides it, the same rule `config-section` follows.
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      count: 4,
+      countNoun: 'playlist',
+      sortOptions: SORTS,
+      sortField: 'name',
+      actions: playlistActions([]),
+    });
+
+    await widthOf(el, 480);
+
+    const more = shadow<HTMLButtonElement>(el, '.more-button')!;
+
+    expect(more.hidden).toBe(false);
+    expect(more.getAttribute('aria-label')).toBe('More actions');
+    expect(more.getAttribute('aria-expanded')).toBe('false');
+    expect(more.getAttribute('aria-haspopup')).toBe('menu');
+
+    const panel = shadow<HTMLElement>(el, '#page-header-overflow')!;
+
+    expect(more.getAttribute('aria-controls')).toBe(panel.id);
+    expect(panel.getAttribute('role')).toBe('menu');
+
+    more.click();
+    await el.updateComplete;
+
+    expect(
+      shadow<HTMLButtonElement>(el, '.more-button')!.getAttribute(
+        'aria-expanded',
+      ),
+    ).toBe('true');
+  });
+
+  it('runs a collapsed action from the menu, and closes it', async () => {
+    const seen: string[] = [];
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      count: 4,
+      countNoun: 'playlist',
+      sortOptions: SORTS,
+      sortField: 'name',
+      actions: playlistActions(seen),
+    });
+
+    await widthOf(el, 700);
+    shadow<HTMLButtonElement>(el, '.more-button')!.click();
+    await el.updateComplete;
+
+    shadowAll<HTMLElement>(el, '#page-header-overflow wa-dropdown-item')[0]!.click();
+    await el.updateComplete;
+
+    expect(seen).toEqual(['import']);
+    expect(
+      shadow<HTMLButtonElement>(el, '.more-button')!.getAttribute(
+        'aria-expanded',
+      ),
+    ).toBe('false');
+  });
+
+  it('keeps a drop target a drop target, and does not fake one in the menu', async () => {
+    // You cannot drag a track onto a closed menu, so the affordance is
+    // absent from the overflow rather than approximated there. The
+    // header wires the handlers onto the button and owns none of them.
+    const dropped: string[] = [];
+    const actions: PageAction[] = [
+      {
+        id: 'new-playlist',
+        label: 'New Playlist',
+        icon: 'plus',
+        onSelect: () => undefined,
+        drop: {
+          active: true,
+          onDragOver: () => dropped.push('over'),
+          onDragLeave: () => dropped.push('leave'),
+          onDrop: () => dropped.push('drop'),
+        },
+      },
+    ];
+    const el = await fixture<PageHeader>('page-header', {
+      heading: 'Playlists',
+      actions,
+    });
+
+    await widthOf(el, 1200);
+
+    const button = shadow<HTMLElement>(
+      el,
+      '[data-testid="page-action-new-playlist"]',
+    )!;
+
+    expect(button.classList.contains('drag-over')).toBe(true);
+
+    button.dispatchEvent(new DragEvent('dragover', { bubbles: true }));
+    button.dispatchEvent(new DragEvent('drop', { bubbles: true }));
+
+    expect(dropped).toEqual(['over', 'drop']);
+
+    // …and collapsed, it is a menu item with no drop wiring at all.
+    await widthOf(el, 120);
+
+    expect(menu(el)).toEqual(['New Playlist']);
+    expect(
+      shadow<HTMLElement>(el, '[data-testid="page-action-new-playlist"]')
+        ?.hidden,
+    ).toBe(true);
+  });
+
+  it('renders nothing at all for a view with no actions', async () => {
+    // Two of the three hosts have one action and one has none while its
+    // other tab is up; an empty actions row is not a mode.
+    const el = await fixture<PageHeader>('page-header', { heading: 'Albums' });
+
+    await widthOf(el, 900);
+
+    expect(shadow(el, '.actions')).toBeNull();
+  });
+});
+
 describe('<page-header> as each view wears it', () => {
   // One baseline per arrangement rather than per view: the point is
   // that eight views produce four shapes, not eight.