chore: remove all .jsx files from Frontend src

Vite resolves .tsx before .jsx (per extensions order in vite.config.ts),
so .jsx files were never loaded at runtime. Switching to TSX-only source.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/prisma.config.js.bak

@@ -0,0 +1,15 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const dotenv_1 = __importDefault(require("dotenv"));
+const path_1 = __importDefault(require("path"));
+const config_1 = require("prisma/config");
+dotenv_1.default.config({ path: path_1.default.resolve(__dirname, ".env") });
+exports.default = (0, config_1.defineConfig)({
+    schema: "prisma/schema.prisma",
+    datasource: {
+        url: (0, config_1.env)("DATABASE_URL"),
+    },
+});