Import december-2020-12-18 from private repo (scrubbed 2026-05-27)

Targets Rec Room 2020.12.18 client.

Re-import after adding:
- DorkNet.ClientMod/dorknet-clientmod.json.template — config schema
  the launcher's manifest-driven patcher renders into UserData/.
- tools/build-patcher-zip.ps1 — produces the dorknet-clientpatch-{key}.zip
  Release asset the launcher fetches.
- .github/workflows/release.yml — auto-publishes both Release assets
  on v1-december-* tag push.

Scrubbed via maintainer-side scrub-for-public.ps1: same drop rules as
the prior import, plus build-patcher-zip.ps1 added to the tools/
allow-list so it survives the scrub.

DorkNet.Server/Controllers/Strings/StringsController.cs

@@ -0,0 +1,18 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace DorkNet.Server.Controllers.Strings;
+
+/// <summary>
+/// strings.rec.net — game localisation strings.
+/// Returns an empty table so the client falls back to its bundled defaults.
+/// </summary>
+[ApiController]
+public class StringsController : ControllerBase
+{
+    [HttpGet("/strings/v1")]
+    public ActionResult<Dictionary<string, string>> GetStrings() => Ok(new Dictionary<string, string>());
+
+    [HttpGet("/strings/v1/{locale}")]
+    public ActionResult<Dictionary<string, string>> GetLocale(string locale)
+        => Ok(new Dictionary<string, string>());
+}