Phase 002: rebrand to hermes-ui and consolidate i18n to zh/en

Removes the ekko / hermes-web-ui branding from the whole tree and drops
eight locale files, so the project presents one name and one language pair.

Data compatibility is deliberate, not accidental: DB filenames, the JWT
audience, and skill manifest ownership all still recognise their pre-rename
values so existing deployments under ~/.hermes-web-ui keep working without a
re-login or a re-injection.

scripts/harness-check.mjs now scans for the legacy strings and fails the
build on any new occurrence, with an explicit allow-list (and reasons) for
the compatibility paths that must keep them.

bin/hermes-ui-mcp.mjs

@@ -155,7 +155,7 @@ async function request(path, options = {}) {
 
 function appendQuery(path, query) {
   if (!query || typeof query !== 'object' || Array.isArray(query)) return path
-  const parsed = new URL(path, 'http://hermes-web-ui.local')
+  const parsed = new URL(path, 'http://hermes-ui.local')
   for (const [key, value] of Object.entries(query)) {
     if (value == null) continue
     if (Array.isArray(value)) {
@@ -227,7 +227,7 @@ function normalizeApiPath(path) {
   const raw = String(path || '').trim()
   if (!raw || !raw.startsWith('/') || raw.startsWith('//')) return null
   if (raw === '/v1' || raw.startsWith('/v1/')) return null
-  const parsed = new URL(raw, 'http://hermes-web-ui.local')
+  const parsed = new URL(raw, 'http://hermes-ui.local')
   const normalized = `${parsed.pathname}${parsed.search}`
   if (parsed.pathname === '/api/openapi.json') return normalized
   if (parsed.pathname === '/health') return normalized
@@ -248,7 +248,7 @@ async function openApiDocument(options = {}) {
 }
 
 function pathWithoutQuery(path) {
-  return new URL(path, 'http://hermes-web-ui.local').pathname
+  return new URL(path, 'http://hermes-ui.local').pathname
 }
 
 function pathTemplateRegex(template) {
@@ -273,7 +273,7 @@ function findOpenApiOperation(openapi, method, path) {
 }
 
 function queryObjectFromPath(path, query) {
-  const parsed = new URL(path, 'http://hermes-web-ui.local')
+  const parsed = new URL(path, 'http://hermes-ui.local')
   const values = {}
   for (const [key, value] of parsed.searchParams.entries()) {
     if (values[key] === undefined) values[key] = value