Help on every option and every page

- Each option's explanation moves from a line of text under its label to
  a small tooltip on an ⓘ beside it, so forms read calmer and the help is
  still one hover away.
- Help text is ours where written (src/help/texts.ts: domains, people,
  DNS providers, blocked addresses, and the main pages), and the schema's
  description elsewhere.
- A "?" on every list and form opens a side panel: what the page is for,
  what people usually do there, and every option explained.
- Every tooltip and panel carries a stable help id (x:Domain.dnsManagement,
  x:Domain), and manual.ts turns an id into a link to the admin manual
  once one is configured (VITE_MANUAL_URL, or <meta name="manual-url">).
  Until then no link shows.

src/components/lists/DynamicList.tsx

@@ -7,6 +7,7 @@
 
 import { EmptyState } from '@/components/common/EmptyState';
 import { PageHeader } from '@/components/common/PageHeader';
+import { HelpPanel } from '@/help/HelpPanel';
 import { iconForView } from '@/lib/viewIcon';
 import React, { useState, useEffect, useCallback, useMemo } from 'react';
 import { useNavigate, useSearchParams } from 'react-router-dom';
@@ -1113,6 +1114,7 @@ export function DynamicList({ viewName }: DynamicListProps) {
       <div className="flex flex-wrap items-start justify-between gap-4">
         <PageHeader icon={iconForView(schema, viewName)} title={list.title} subtitle={list.subtitle} />
         <div className="flex items-center gap-2">
+          <HelpPanel viewName={viewName} title={list.title} />
           {hasMassActions && selectedIds.size > 0 && (
             <DropdownMenu>
               <DropdownMenuTrigger asChild>