feat(audio-player): keyboard shortcuts — declarative keymap, dialog, media keys (plan §2)

Space/Enter (body-focus only), H/L + arrows skip, J/K + PgDn/PgUp
chapter steps, B bookmark capture (note box auto-focuses, Enter saves
even when blank, Shift+Enter inserts a newline, Esc cancels),
Alt+arrows / Alt+H/L speed steps, up/down volume with a brief OSD,
M mute, [ ] skip-duration cycle, ? shortcut dialog, Esc closes the
top-most surface (help → capture → note edit → drawers → dropdowns).

audio-keys.ts is the ONE declarative table: resolveShortcut() drives
the document keydown dispatcher and visibleKeymap() renders the
templ dialog (x-for over the exposed keymap — templ cannot import
TS). Hardware media keys ride the existing MediaSession handlers;
the Media* keydown codes resolve through the same table to the SAME
methods, so both layers stay one behavior.

Guards mirror the ebook reader: typing in any
INPUT/TEXTAREA/contentEditable never triggers shortcuts (bookmark
notes included), a focused button keeps Space/Enter for itself, and
the focused scrubber keeps its arrows (its own @change seeks — a
native arrow nudge moves 0.08s, not a 10s skip).

SKIP_SECONDS consolidates to one const beside SPEEDS (the templ skip
dropdown now iterates skipChoices; [ ] cycles via cycleSkip()) — the
same one-source pattern as the §5 speed-list consolidation.

Unit: audio-keys.test.ts (resolution, Alt disambiguation, media
keys, keymap integrity and conflict-freedom, dialog visibility) and
cycleSkip tests. Live: 39 Playwright checks on the KJV folder book
covering every binding, the guards, dialog and OSD; probe user
created and deleted.

web/src/audio.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 
-import { SPEEDS, normalizeSpeed, stepSpeed } from "./audio";
+import { SPEEDS, normalizeSpeed, stepSpeed, SKIP_SECONDS, cycleSkip } from "./audio";
 
 describe("SPEEDS", () => {
   it("is the agreed list from the player plan (0.5 through 3)", () => {
@@ -53,3 +53,21 @@ describe("stepSpeed", () => {
     expect(stepSpeed(2.2, -1)).toBe(0.75);
   });
 });
+
+describe("SKIP_SECONDS + cycleSkip", () => {
+  it("is the agreed skip list", () => {
+    expect(SKIP_SECONDS).toEqual([1, 5, 10, 15, 30]);
+  });
+
+  it("cycles forward and backward, clamping at the ends", () => {
+    expect(cycleSkip(10, 1)).toBe(15);
+    expect(cycleSkip(10, -1)).toBe(5);
+    expect(cycleSkip(1, -1)).toBe(1);
+    expect(cycleSkip(30, 1)).toBe(30);
+  });
+
+  it("anchors unknown currents at 10s before stepping", () => {
+    expect(cycleSkip(7, 1)).toBe(15);
+    expect(cycleSkip(7, -1)).toBe(5);
+  });
+});