fix(web): complete the CSP-build migration across remaining surfaces

- audio reader: scrub/volume/speed/genre-tick bindings converted to
  component methods (onScrubInput, setVolumeFromEvent,
  applyDefaultSpeedFromSelect, volumeLabel, railTickStyle,
  isSkipActive/isSpeedActive) — these used Number/Math/String globals
  that the CSP evaluator cannot resolve
- fmtTime restored to the audioReader component: the unexport pass
  had ripped it from the Alpine.data object (time displays were dead)
- book detail: cover-upload click and banner edit validation moved to
  component methods (triggerCoverUpload, bannerEditHasText)
- admin/docs/index components: init() hooks for their x-init chains
- CSP header: 'unsafe-eval' dropped — the CSP build needs no eval
- e2e spec: replace test.info().annotate (unavailable in this
  Playwright version) with console logging

web/src/book-detail.ts

@@ -55,6 +55,10 @@ function hideMetadataEditor(): void {
   if (modal) modal.classList.add("hidden");
 }
 
+function triggerCoverUpload(): void {
+  document.getElementById("cover-upload-input")?.click();
+}
+
 function collectFormData(editorTags: string[]): Record<string, unknown> {
   const modal = document.getElementById("metadata-editor-modal");
   if (!modal) return {};
@@ -217,6 +221,10 @@ Alpine.data("bookDetail", () => {
     showProgressSyncModal,
     hideProgressSyncModal,
     hideNotesModal,
+    triggerCoverUpload,
+    bannerEditHasText(): boolean {
+      return (this.bannerEditText || "").trim().length > 0;
+    },
 
     async toggleAnnotationsBanner() {
       this.annotationsBannerOpen = !this.annotationsBannerOpen;