refactor(ext/popup): rename entry-* → item-* components

Git-moves the three popup components so history survives the content
rewrite that follows in Tasks 22–24:
- entry-list.ts   → item-list.ts
- entry-detail.ts → item-detail.ts
- entry-form.ts   → item-form.ts

Also renames the exported render functions (renderEntryList →
renderItemList, etc.) and updates popup.ts imports + render switch.
The files still wear @ts-nocheck and reference the old Entry type;
content rewriting happens in Tasks 22–24.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extension/src/popup/components/item-detail.ts

@@ -29,7 +29,7 @@ async function copyToClipboard(text: string): Promise<void> {
   }
 }
 
-export function renderEntryDetail(app: HTMLElement): void {
+export function renderItemDetail(app: HTMLElement): void {
   const state = getState();
   const entry = state.selectedEntry;
   const id = state.selectedId;

extension/src/popup/components/item-form.ts

@@ -4,7 +4,7 @@
 import { getState, setState, sendMessage, navigate, escapeHtml } from '../popup';
 import type { Entry, ManifestEntry } from '../../shared/types';
 
-export function renderEntryForm(app: HTMLElement, mode: 'add' | 'edit'): void {
+export function renderItemForm(app: HTMLElement, mode: 'add' | 'edit'): void {
   const state = getState();
   const existing = mode === 'edit' ? state.selectedEntry : null;
 

extension/src/popup/components/item-list.ts

@@ -23,7 +23,7 @@ function getGroups(entries: Array<[string, ManifestEntry]>): string[] {
   return Array.from(groups).sort();
 }
 
-export function renderEntryList(app: HTMLElement): void {
+export function renderItemList(app: HTMLElement): void {
   const state = getState();
   const groups = getGroups(state.entries);
   const filtered = getFilteredEntries();