chore: auto-fix Biome formatting and configure lint rules

Run biome check --write --unsafe to fix tabs, import ordering, and
non-null assertions across entire codebase. Disable a11y rules not
applicable to this single-user app. Exclude auto-generated routeTree.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/server/index.ts

@@ -1,13 +1,13 @@
 import { Hono } from "hono";
 import { serveStatic } from "hono/bun";
 import { seedDefaults } from "../db/seed.ts";
-import { itemRoutes } from "./routes/items.ts";
 import { categoryRoutes } from "./routes/categories.ts";
-import { totalRoutes } from "./routes/totals.ts";
 import { imageRoutes } from "./routes/images.ts";
+import { itemRoutes } from "./routes/items.ts";
 import { settingsRoutes } from "./routes/settings.ts";
-import { threadRoutes } from "./routes/threads.ts";
 import { setupRoutes } from "./routes/setups.ts";
+import { threadRoutes } from "./routes/threads.ts";
+import { totalRoutes } from "./routes/totals.ts";
 
 // Seed default data on startup
 seedDefaults();
@@ -16,7 +16,7 @@ const app = new Hono();
 
 // Health check
 app.get("/api/health", (c) => {
-  return c.json({ status: "ok" });
+	return c.json({ status: "ok" });
 });
 
 // API routes
@@ -33,8 +33,8 @@ app.use("/uploads/*", serveStatic({ root: "./" }));
 
 // Serve Vite-built SPA in production
 if (process.env.NODE_ENV === "production") {
-  app.use("/*", serveStatic({ root: "./dist/client" }));
-  app.get("*", serveStatic({ path: "./dist/client/index.html" }));
+	app.use("/*", serveStatic({ root: "./dist/client" }));
+	app.get("*", serveStatic({ path: "./dist/client/index.html" }));
 }
 
 export default { port: 3000, fetch: app.fetch };