Phase 1: chunk store, tile rendering pipeline, and Leaflet viewer

api: WS gateway with token auth (Postgres-backed servers table, seeded via
`bun run seed`), column-granularity chunk store (hand-written SQL
migrations, no drizzle-kit CLI — its config loader needs esbuild, which
doesn't install cleanly here), dirty-chunk Redis stream producer with
per-flush dedup, and a tile-serving route.

worker: consumes the dirty-chunk stream via a proper consumer group,
rasterizes each chunk's columns into a single-resolution top-down PNG
(static pre-Flattening block-id palette), uploads to MinIO, and upserts
the tile pointer.

frontend: barebones Leaflet 2D viewer (CRS.Simple, one native zoom level)
wired to /api/servers and /api/tiles.

Object storage: tiles live in a dedicated `mcmapper-tiles` bucket on the
existing shared MinIO instance (devstack-minio on octo-winsrv) instead of
a per-stack container, via a scoped access key limited to that one bucket
— see README's "Object storage" section. MINIO_SECRET_KEY is real and is
deliberately not committed; docker-compose layers an untracked .env over
.env.example for it.

Full pipeline verified end-to-end against live containers: WS auth ->
Postgres upsert -> deduped Redis dirty-chunk event -> worker rasterize ->
MinIO upload -> tile fetch through the api route, including from the
actual mod-side WS client (see MCMapper-Mod's matching commit).

frontend/src/index.ts

@@ -2,15 +2,15 @@ import { Elysia } from "elysia";
 import pug from "pug";
 import { join } from "path";
 
-// Phase 0 skeleton: one server-rendered page. The real map viewer (Leaflet 2D + Babylon 3D
-// canvases, server selector, chat box, marker tool) lands starting Phase 1 — this just proves
-// the Pug+Tailwind+Alpine rendering pipeline end to end.
+// Phase 1: a barebones Leaflet 2D viewer (see public/js/map.js). Babylon 3D canvas, chat box,
+// marker tool, and admin panel land in later phases per the plan's phased delivery.
 const renderIndex = pug.compileFile(join(import.meta.dir, "views/index.pug"));
 
 const app = new Elysia()
   .get("/", () => new Response(renderIndex({}), { headers: { "Content-Type": "text/html" } }))
   .get("/health", () => ({ status: "ok" }))
   .get("/css/tailwind.css", () => Bun.file(join(import.meta.dir, "public/css/tailwind.css")))
+  .get("/js/map.js", () => Bun.file(join(import.meta.dir, "public/js/map.js")))
   .listen(Number(process.env.PORT ?? 3001));
 
 console.log(`[frontend] listening on :${app.server?.port}`);