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.

packages/server/src/services/ekko-agent/mcp.ts

@@ -44,6 +44,9 @@ function shouldIncludeManagedMcpServers(): boolean {
 function candidateBundledMcpScripts(): string[] {
   return [
     process.env.HERMES_WEB_UI_MCP_BIN,
+    join(process.cwd(), 'bin/hermes-ui-mcp.mjs'),
+    join(__dirname, '../../bin/hermes-ui-mcp.mjs'),
+    join(__dirname, '../../../../../bin/hermes-ui-mcp.mjs'),
     join(process.cwd(), 'bin/hermes-studio-mcp.mjs'),
     join(__dirname, '../../bin/hermes-studio-mcp.mjs'),
     join(__dirname, '../../../../../bin/hermes-studio-mcp.mjs'),