diff --git a/.gitignore b/.gitignore
index 49bb099..0094673 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,6 @@ e2e/test-results/
 e2e/playwright-report/
 
 .codex
+
+# Compiled frontend bundle — built from client/*.ts by scripts/build-client.mjs
+public/dist/
diff --git a/Dockerfile b/Dockerfile
index e9ad71b..2a3407e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,6 +28,10 @@ COPY . .
 # Ensure the entrypoint is executable regardless of host file permissions
 RUN chmod +x /app/docker-entrypoint.sh
 
+# Build the TypeScript client bundle (client/*.ts → public/dist/*.js).
+# esbuild is in regular deps so this works after npm install --omit=dev.
+RUN node scripts/build-client.mjs
+
 RUN mkdir -p /app/data/logs
 
 # Download Browser Whisper (COMPLETE self-hosting - zero CDN dependencies)
diff --git a/client/main.ts b/client/main.ts
new file mode 100644
index 0000000..e5d6c0a
--- /dev/null
+++ b/client/main.ts
@@ -0,0 +1,27 @@
+// ============================================================
+// client/main.ts — Entry point for the TypeScript frontend bundle.
+//
+// Built by scripts/build-client.mjs into public/dist/main.js,
+// loaded by index.html via:
+//   <script type="module" src="/dist/main.js"></script>
+//
+// Strangler-fig migration: this bundle runs ALONGSIDE the legacy
+// public/js/*.js IIFE files. As each legacy module is migrated, it
+// moves out of public/js/ into client/<feature>/ and is imported
+// from this entry point. The legacy script tag is removed from
+// index.html in the same commit.
+//
+// Sacred files (per project memory) — DO NOT migrate without
+// per-file approval from Daniel:
+//   - public/js/encounters.js (save/idempotency logic)
+//   - public/js/voiceDictation.js, sickVisit.js recording paths
+//     (voice/STT plumbing)
+// ============================================================
+
+console.log('[client] TypeScript bundle loaded.');
+
+// Marker so anything else that wants to know if the bundle reached
+// the page can check window.__clientBundle === true.
+(window as any).__clientBundle = true;
+
+export {};
diff --git a/package-lock.json b/package-lock.json
index 42596e8..fd7896d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,6 +23,7 @@
         "cookie-parser": "^1.4.7",
         "cors": "^2.8.5",
         "dotenv": "^16.4.5",
+        "esbuild": "^0.28.0",
         "express": "^4.21.0",
         "express-rate-limit": "^7.4.0",
         "helmet": "^8.0.0",
@@ -1575,9 +1576,9 @@
       }
     },
     "node_modules/@esbuild/aix-ppc64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.27.7.tgz",
-      "integrity": "sha512-EKX3Qwmhz1eMdEJokhALr0YiD0lhQNwDqkPYyPhiSwKrh7/4KRjQc04sZ8db+5DVVnZ1LmbNDI1uAMPEUBnQPg==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.28.0.tgz",
+      "integrity": "sha512-lhRUCeuOyJQURhTxl4WkpFTjIsbDayJHih5kZC1giwE+MhIzAb7mEsQMqMf18rHLsrb5qI1tafG20mLxEWcWlA==",
       "cpu": [
         "ppc64"
       ],
@@ -1591,9 +1592,9 @@
       }
     },
     "node_modules/@esbuild/android-arm": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.27.7.tgz",
-      "integrity": "sha512-jbPXvB4Yj2yBV7HUfE2KHe4GJX51QplCN1pGbYjvsyCZbQmies29EoJbkEc+vYuU5o45AfQn37vZlyXy4YJ8RQ==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.28.0.tgz",
+      "integrity": "sha512-wqh0ByljabXLKHeWXYLqoJ5jKC4XBaw6Hk08OfMrCRd2nP2ZQ5eleDZC41XHyCNgktBGYMbqnrJKq/K/lzPMSQ==",
       "cpu": [
         "arm"
       ],
@@ -1607,9 +1608,9 @@
       }
     },
     "node_modules/@esbuild/android-arm64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.27.7.tgz",
-      "integrity": "sha512-62dPZHpIXzvChfvfLJow3q5dDtiNMkwiRzPylSCfriLvZeq0a1bWChrGx/BbUbPwOrsWKMn8idSllklzBy+dgQ==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.28.0.tgz",
+      "integrity": "sha512-+WzIXQOSaGs33tLEgYPYe/yQHf0WTU0X42Jca3y8NWMbUVhp7rUnw+vAsRC/QiDrdD31IszMrZy+qwPOPjd+rw==",
       "cpu": [
         "arm64"
       ],
@@ -1623,9 +1624,9 @@
       }
     },
     "node_modules/@esbuild/android-x64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.27.7.tgz",
-      "integrity": "sha512-x5VpMODneVDb70PYV2VQOmIUUiBtY3D3mPBG8NxVk5CogneYhkR7MmM3yR/uMdITLrC1ml/NV1rj4bMJuy9MCg==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.28.0.tgz",
+      "integrity": "sha512-+VJggoaKhk2VNNqVL7f6S189UzShHC/mR9EE8rDdSkdpN0KflSwWY/gWjDrNxxisg8Fp1ZCD9jLMo4m0OUfeUA==",
       "cpu": [
         "x64"
       ],
@@ -1639,9 +1640,9 @@
       }
     },
     "node_modules/@esbuild/darwin-arm64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/darwin-arm64/-/darwin-arm64-0.27.7.tgz",
-      "integrity": "sha512-5lckdqeuBPlKUwvoCXIgI2D9/ABmPq3Rdp7IfL70393YgaASt7tbju3Ac+ePVi3KDH6N2RqePfHnXkaDtY9fkw==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/darwin-arm64/-/darwin-arm64-0.28.0.tgz",
+      "integrity": "sha512-0T+A9WZm+bZ84nZBtk1ckYsOvyA3x7e2Acj1KdVfV4/2tdG4fzUp91YHx+GArWLtwqp77pBXVCPn2We7Letr0Q==",
       "cpu": [
         "arm64"
       ],
@@ -1655,9 +1656,9 @@
       }
     },
     "node_modules/@esbuild/darwin-x64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/darwin-x64/-/darwin-x64-0.27.7.tgz",
-      "integrity": "sha512-rYnXrKcXuT7Z+WL5K980jVFdvVKhCHhUwid+dDYQpH+qu+TefcomiMAJpIiC2EM3Rjtq0sO3StMV/+3w3MyyqQ==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/darwin-x64/-/darwin-x64-0.28.0.tgz",
+      "integrity": "sha512-fyzLm/DLDl/84OCfp2f/XQ4flmORsjU7VKt8HLjvIXChJoFFOIL6pLJPH4Yhd1n1gGFF9mPwtlN5Wf82DZs+LQ==",
       "cpu": [
         "x64"
       ],
@@ -1671,9 +1672,9 @@
       }
     },
     "node_modules/@esbuild/freebsd-arm64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-arm64/-/freebsd-arm64-0.27.7.tgz",
-      "integrity": "sha512-B48PqeCsEgOtzME2GbNM2roU29AMTuOIN91dsMO30t+Ydis3z/3Ngoj5hhnsOSSwNzS+6JppqWsuhTp6E82l2w==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-arm64/-/freebsd-arm64-0.28.0.tgz",
+      "integrity": "sha512-l9GeW5UZBT9k9brBYI+0WDffcRxgHQD8ShN2Ur4xWq/NFzUKm3k5lsH4PdaRgb2w7mI9u61nr2gI2mLI27Nh3Q==",
       "cpu": [
         "arm64"
       ],
@@ -1687,9 +1688,9 @@
       }
     },
     "node_modules/@esbuild/freebsd-x64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-x64/-/freebsd-x64-0.27.7.tgz",
-      "integrity": "sha512-jOBDK5XEjA4m5IJK3bpAQF9/Lelu/Z9ZcdhTRLf4cajlB+8VEhFFRjWgfy3M1O4rO2GQ/b2dLwCUGpiF/eATNQ==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-x64/-/freebsd-x64-0.28.0.tgz",
+      "integrity": "sha512-BXoQai/A0wPO6Es3yFJ7APCiKGc1tdAEOgeTNy3SsB491S3aHn4S4r3e976eUnPdU+NbdtmBuLncYir2tMU9Nw==",
       "cpu": [
         "x64"
       ],
@@ -1703,9 +1704,9 @@
       }
     },
     "node_modules/@esbuild/linux-arm": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-arm/-/linux-arm-0.27.7.tgz",
-      "integrity": "sha512-RkT/YXYBTSULo3+af8Ib0ykH8u2MBh57o7q/DAs3lTJlyVQkgQvlrPTnjIzzRPQyavxtPtfg0EopvDyIt0j1rA==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-arm/-/linux-arm-0.28.0.tgz",
+      "integrity": "sha512-CjaaREJagqJp7iTaNQjjidaNbCKYcd4IDkzbwwxtSvjI7NZm79qiHc8HqciMddQ6CKvJT6aBd8lO9kN/ZudLlw==",
       "cpu": [
         "arm"
       ],
@@ -1719,9 +1720,9 @@
       }
     },
     "node_modules/@esbuild/linux-arm64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-arm64/-/linux-arm64-0.27.7.tgz",
-      "integrity": "sha512-RZPHBoxXuNnPQO9rvjh5jdkRmVizktkT7TCDkDmQ0W2SwHInKCAV95GRuvdSvA7w4VMwfCjUiPwDi0ZO6Nfe9A==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-arm64/-/linux-arm64-0.28.0.tgz",
+      "integrity": "sha512-RVyzfb3FWsGA55n6WY0MEIEPURL1FcbhFE6BffZEMEekfCzCIMtB5yyDcFnVbTnwk+CLAgTujmV/Lgvih56W+A==",
       "cpu": [
         "arm64"
       ],
@@ -1735,9 +1736,9 @@
       }
     },
     "node_modules/@esbuild/linux-ia32": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-ia32/-/linux-ia32-0.27.7.tgz",
-      "integrity": "sha512-GA48aKNkyQDbd3KtkplYWT102C5sn/EZTY4XROkxONgruHPU72l+gW+FfF8tf2cFjeHaRbWpOYa/uRBz/Xq1Pg==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-ia32/-/linux-ia32-0.28.0.tgz",
+      "integrity": "sha512-KBnSTt1kxl9x70q+ydterVdl+Cn0H18ngRMRCEQfrbqdUuntQQ0LoMZv47uB97NljZFzY6HcfqEZ2SAyIUTQBQ==",
       "cpu": [
         "ia32"
       ],
@@ -1751,9 +1752,9 @@
       }
     },
     "node_modules/@esbuild/linux-loong64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-loong64/-/linux-loong64-0.27.7.tgz",
-      "integrity": "sha512-a4POruNM2oWsD4WKvBSEKGIiWQF8fZOAsycHOt6JBpZ+JN2n2JH9WAv56SOyu9X5IqAjqSIPTaJkqN8F7XOQ5Q==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-loong64/-/linux-loong64-0.28.0.tgz",
+      "integrity": "sha512-zpSlUce1mnxzgBADvxKXX5sl8aYQHo2ezvMNI8I0lbblJtp8V4odlm3Yzlj7gPyt3T8ReksE6bK+pT3WD+aJRg==",
       "cpu": [
         "loong64"
       ],
@@ -1767,9 +1768,9 @@
       }
     },
     "node_modules/@esbuild/linux-mips64el": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-mips64el/-/linux-mips64el-0.27.7.tgz",
-      "integrity": "sha512-KabT5I6StirGfIz0FMgl1I+R1H73Gp0ofL9A3nG3i/cYFJzKHhouBV5VWK1CSgKvVaG4q1RNpCTR2LuTVB3fIw==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-mips64el/-/linux-mips64el-0.28.0.tgz",
+      "integrity": "sha512-2jIfP6mmjkdmeTlsX/9vmdmhBmKADrWqN7zcdtHIeNSCH1SqIoNI63cYsjQR8J+wGa4Y5izRcSHSm8K3QWmk3w==",
       "cpu": [
         "mips64el"
       ],
@@ -1783,9 +1784,9 @@
       }
     },
     "node_modules/@esbuild/linux-ppc64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-ppc64/-/linux-ppc64-0.27.7.tgz",
-      "integrity": "sha512-gRsL4x6wsGHGRqhtI+ifpN/vpOFTQtnbsupUF5R5YTAg+y/lKelYR1hXbnBdzDjGbMYjVJLJTd2OFmMewAgwlQ==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-ppc64/-/linux-ppc64-0.28.0.tgz",
+      "integrity": "sha512-bc0FE9wWeC0WBm49IQMPSPILRocGTQt3j5KPCA8os6VprfuJ7KD+5PzESSrJ6GmPIPJK965ZJHTUlSA6GNYEhg==",
       "cpu": [
         "ppc64"
       ],
@@ -1799,9 +1800,9 @@
       }
     },
     "node_modules/@esbuild/linux-riscv64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-riscv64/-/linux-riscv64-0.27.7.tgz",
-      "integrity": "sha512-hL25LbxO1QOngGzu2U5xeXtxXcW+/GvMN3ejANqXkxZ/opySAZMrc+9LY/WyjAan41unrR3YrmtTsUpwT66InQ==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-riscv64/-/linux-riscv64-0.28.0.tgz",
+      "integrity": "sha512-SQPZOwoTTT/HXFXQJG/vBX8sOFagGqvZyXcgLA3NhIqcBv1BJU1d46c0rGcrij2B56Z2rNiSLaZOYW5cUk7yLQ==",
       "cpu": [
         "riscv64"
       ],
@@ -1815,9 +1816,9 @@
       }
     },
     "node_modules/@esbuild/linux-s390x": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-s390x/-/linux-s390x-0.27.7.tgz",
-      "integrity": "sha512-2k8go8Ycu1Kb46vEelhu1vqEP+UeRVj2zY1pSuPdgvbd5ykAw82Lrro28vXUrRmzEsUV0NzCf54yARIK8r0fdw==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-s390x/-/linux-s390x-0.28.0.tgz",
+      "integrity": "sha512-SCfR0HN8CEEjnYnySJTd2cw0k9OHB/YFzt5zgJEwa+wL/T/raGWYMBqwDNAC6dqFKmJYZoQBRfHjgwLHGSrn3Q==",
       "cpu": [
         "s390x"
       ],
@@ -1831,9 +1832,9 @@
       }
     },
     "node_modules/@esbuild/linux-x64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/linux-x64/-/linux-x64-0.27.7.tgz",
-      "integrity": "sha512-hzznmADPt+OmsYzw1EE33ccA+HPdIqiCRq7cQeL1Jlq2gb1+OyWBkMCrYGBJ+sxVzve2ZJEVeePbLM2iEIZSxA==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-x64/-/linux-x64-0.28.0.tgz",
+      "integrity": "sha512-us0dSb9iFxIi8srnpl931Nvs65it/Jd2a2K3qs7fz2WfGPHqzfzZTfec7oxZJRNPXPnNYZtanmRc4AL/JwVzHQ==",
       "cpu": [
         "x64"
       ],
@@ -1847,9 +1848,9 @@
       }
     },
     "node_modules/@esbuild/netbsd-arm64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/netbsd-arm64/-/netbsd-arm64-0.27.7.tgz",
-      "integrity": "sha512-b6pqtrQdigZBwZxAn1UpazEisvwaIDvdbMbmrly7cDTMFnw/+3lVxxCTGOrkPVnsYIosJJXAsILG9XcQS+Yu6w==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/netbsd-arm64/-/netbsd-arm64-0.28.0.tgz",
+      "integrity": "sha512-CR/RYotgtCKwtftMwJlUU7xCVNg3lMYZ0RzTmAHSfLCXw3NtZtNpswLEj/Kkf6kEL3Gw+BpOekRX0BYCtklhUw==",
       "cpu": [
         "arm64"
       ],
@@ -1863,9 +1864,9 @@
       }
     },
     "node_modules/@esbuild/netbsd-x64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/netbsd-x64/-/netbsd-x64-0.27.7.tgz",
-      "integrity": "sha512-OfatkLojr6U+WN5EDYuoQhtM+1xco+/6FSzJJnuWiUw5eVcicbyK3dq5EeV/QHT1uy6GoDhGbFpprUiHUYggrw==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/netbsd-x64/-/netbsd-x64-0.28.0.tgz",
+      "integrity": "sha512-nU1yhmYutL+fQ71Kxnhg8uEOdC0pwEW9entHykTgEbna2pw2dkbFSMeqjjyHZoCmt8SBkOSvV+yNmm94aUrrqw==",
       "cpu": [
         "x64"
       ],
@@ -1879,9 +1880,9 @@
       }
     },
     "node_modules/@esbuild/openbsd-arm64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/openbsd-arm64/-/openbsd-arm64-0.27.7.tgz",
-      "integrity": "sha512-AFuojMQTxAz75Fo8idVcqoQWEHIXFRbOc1TrVcFSgCZtQfSdc1RXgB3tjOn/krRHENUB4j00bfGjyl2mJrU37A==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/openbsd-arm64/-/openbsd-arm64-0.28.0.tgz",
+      "integrity": "sha512-cXb5vApOsRsxsEl4mcZ1XY3D4DzcoMxR/nnc4IyqYs0rTI8ZKmW6kyyg+11Z8yvgMfAEldKzP7AdP64HnSC/6g==",
       "cpu": [
         "arm64"
       ],
@@ -1895,9 +1896,9 @@
       }
     },
     "node_modules/@esbuild/openbsd-x64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/openbsd-x64/-/openbsd-x64-0.27.7.tgz",
-      "integrity": "sha512-+A1NJmfM8WNDv5CLVQYJ5PshuRm/4cI6WMZRg1by1GwPIQPCTs1GLEUHwiiQGT5zDdyLiRM/l1G0Pv54gvtKIg==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/openbsd-x64/-/openbsd-x64-0.28.0.tgz",
+      "integrity": "sha512-8wZM2qqtv9UP3mzy7HiGYNH/zjTA355mpeuA+859TyR+e+Tc08IHYpLJuMsfpDJwoLo1ikIJI8jC3GFjnRClzA==",
       "cpu": [
         "x64"
       ],
@@ -1911,9 +1912,9 @@
       }
     },
     "node_modules/@esbuild/openharmony-arm64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/openharmony-arm64/-/openharmony-arm64-0.27.7.tgz",
-      "integrity": "sha512-+KrvYb/C8zA9CU/g0sR6w2RBw7IGc5J2BPnc3dYc5VJxHCSF1yNMxTV5LQ7GuKteQXZtspjFbiuW5/dOj7H4Yw==",
+      "version": "0.28.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/openharmony-arm64/-/openharmony-arm64-0.28.0.tgz",
+      "integrity": "sha512-FLGfyizszcef5C3YtoyQDACyg95+dndv79i2EekILBofh5wpCa1KuBqOWKrEHZg3zrL3t5ouE5jgr94vA+Wb2w==",
       "cpu": [
         "arm64"
       ],
@@ -1927,9 +1928,9 @@
       }
     },
     "node_modules/@esbuild/sunos-x64": {
-      "version": "0.27.7",
-      "resolved": "https://registry.npmjs.org/@esbuild/sunos-x64/-/sunos-x64-0.27.7.tgz",
-      "integrity": "sha512-ikktIhFBzQNt/QDyOL580ti9+5mL/YZeUPKU2ivGtGjdTYoqz6jObj6nOMfhASpS4GU4Q/Clh1QtxWAvcYKamA==",
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+      "integrity": "sha512-ikktIhFBzQNt/QDyOL580ti9+5mL/YZeUPKU2ivGtGjdTYoqz6jObj6nOMfhASpS4GU4Q/Clh1QtxWAvcYKamA==",
+      "cpu": [
+        "x64"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "sunos"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/tsx/node_modules/@esbuild/win32-arm64": {
+      "version": "0.27.7",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-arm64/-/win32-arm64-0.27.7.tgz",
+      "integrity": "sha512-7yRhbHvPqSpRUV7Q20VuDwbjW5kIMwTHpptuUzV+AA46kiPze5Z7qgt6CLCK3pWFrHeNfDd1VKgyP4O+ng17CA==",
+      "cpu": [
+        "arm64"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/tsx/node_modules/@esbuild/win32-ia32": {
+      "version": "0.27.7",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-ia32/-/win32-ia32-0.27.7.tgz",
+      "integrity": "sha512-SmwKXe6VHIyZYbBLJrhOoCJRB/Z1tckzmgTLfFYOfpMAx63BJEaL9ExI8x7v0oAO3Zh6D/Oi1gVxEYr5oUCFhw==",
+      "cpu": [
+        "ia32"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/tsx/node_modules/@esbuild/win32-x64": {
+      "version": "0.27.7",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-x64/-/win32-x64-0.27.7.tgz",
+      "integrity": "sha512-56hiAJPhwQ1R4i+21FVF7V8kSD5zZTdHcVuRFMW0hn753vVfQN8xlx4uOPT4xoGH0Z/oVATuR82AiqSTDIpaHg==",
+      "cpu": [
+        "x64"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/tsx/node_modules/esbuild": {
+      "version": "0.27.7",
+      "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.27.7.tgz",
+      "integrity": "sha512-IxpibTjyVnmrIQo5aqNpCgoACA/dTKLTlhMHihVHhdkxKyPO1uBBthumT0rdHmcsk9uMonIWS0m4FljWzILh3w==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "bin": {
+        "esbuild": "bin/esbuild"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "optionalDependencies": {
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+        "@esbuild/android-arm": "0.27.7",
+        "@esbuild/android-arm64": "0.27.7",
+        "@esbuild/android-x64": "0.27.7",
+        "@esbuild/darwin-arm64": "0.27.7",
+        "@esbuild/darwin-x64": "0.27.7",
+        "@esbuild/freebsd-arm64": "0.27.7",
+        "@esbuild/freebsd-x64": "0.27.7",
+        "@esbuild/linux-arm": "0.27.7",
+        "@esbuild/linux-arm64": "0.27.7",
+        "@esbuild/linux-ia32": "0.27.7",
+        "@esbuild/linux-loong64": "0.27.7",
+        "@esbuild/linux-mips64el": "0.27.7",
+        "@esbuild/linux-ppc64": "0.27.7",
+        "@esbuild/linux-riscv64": "0.27.7",
+        "@esbuild/linux-s390x": "0.27.7",
+        "@esbuild/linux-x64": "0.27.7",
+        "@esbuild/netbsd-arm64": "0.27.7",
+        "@esbuild/netbsd-x64": "0.27.7",
+        "@esbuild/openbsd-arm64": "0.27.7",
+        "@esbuild/openbsd-x64": "0.27.7",
+        "@esbuild/openharmony-arm64": "0.27.7",
+        "@esbuild/sunos-x64": "0.27.7",
+        "@esbuild/win32-arm64": "0.27.7",
+        "@esbuild/win32-ia32": "0.27.7",
+        "@esbuild/win32-x64": "0.27.7"
+      }
+    },
     "node_modules/type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
diff --git a/package.json b/package.json
index ec0c085..69d4be4 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,8 @@
   "scripts": {
     "start": "tsx server.js",
     "typecheck": "tsc --noEmit",
+    "typecheck:client": "tsc --noEmit -p tsconfig.client.json",
+    "build:client": "node scripts/build-client.mjs",
     "test": "node --test test/",
     "e2e": "./scripts/e2e.sh",
     "maint:check": "node scripts/maintenance.js check",
@@ -32,6 +34,7 @@
     "cookie-parser": "^1.4.7",
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",
+    "esbuild": "^0.28.0",
     "express": "^4.21.0",
     "express-rate-limit": "^7.4.0",
     "helmet": "^8.0.0",
diff --git a/public/index.html b/public/index.html
index ea19b26..78e51d6 100644
--- a/public/index.html
+++ b/public/index.html
@@ -477,6 +477,8 @@
   <script defer src="/js/drugs-loader.js"></script>
   <script defer src="/js/calculators.js"></script>
   <script type="module" src="/js/bedside/index.js"></script>
+  <!-- TypeScript-bundled frontend (built from client/ by scripts/build-client.mjs) -->
+  <script type="module" src="/dist/main.js"></script>
   <script defer src="/js/learningHub.js"></script>
   <script defer src="/js/admin.js"></script>
 
diff --git a/scripts/build-client.mjs b/scripts/build-client.mjs
new file mode 100644
index 0000000..1ac54c2
--- /dev/null
+++ b/scripts/build-client.mjs
@@ -0,0 +1,65 @@
+#!/usr/bin/env node
+// ============================================================
+// build-client.mjs — Compiles client/**/*.ts to public/dist/.
+//
+// Strangler-fig pattern: TS modules live under client/, legacy
+// IIFE files stay under public/js/ until each is migrated.
+// Each top-level .ts file in client/ becomes one ES-module bundle
+// in public/dist/ that index.html can load via:
+//   <script type="module" src="/dist/<name>.js"></script>
+//
+// Run:
+//   npm run build:client          # one-shot
+//   npm run build:client -- --watch   # rebuild on change
+// ============================================================
+
+import { build, context } from 'esbuild';
+import { readdirSync, mkdirSync, existsSync } from 'node:fs';
+import { resolve, dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const PROJECT_ROOT = resolve(__dirname, '..');
+const SRC = resolve(PROJECT_ROOT, 'client');
+const OUT = resolve(PROJECT_ROOT, 'public/dist');
+
+const watch = process.argv.includes('--watch');
+
+if (!existsSync(SRC)) {
+  console.error(`[build-client] Source dir does not exist: ${SRC}`);
+  process.exit(1);
+}
+mkdirSync(OUT, { recursive: true });
+
+// Each top-level .ts/.tsx file in client/ is a separate entry point.
+// Sub-directories are imported by the entries via TS imports — they
+// are NOT separate entries, they get bundled into their parent.
+const entryFiles = readdirSync(SRC, { withFileTypes: true })
+  .filter(d => d.isFile() && /\.tsx?$/.test(d.name))
+  .map(d => resolve(SRC, d.name));
+
+if (entryFiles.length === 0) {
+  console.error(`[build-client] No .ts entry points found in ${SRC}`);
+  process.exit(1);
+}
+
+const buildOpts = {
+  entryPoints: entryFiles,
+  outdir: OUT,
+  bundle: true,
+  format: 'esm',
+  target: 'es2022',
+  platform: 'browser',
+  sourcemap: true,
+  minify: !watch, // unminified in watch mode for easier debugging
+  logLevel: 'info',
+};
+
+if (watch) {
+  const ctx = await context(buildOpts);
+  await ctx.watch();
+  console.log('[build-client] Watching for changes…');
+} else {
+  await build(buildOpts);
+  console.log(`[build-client] Built ${entryFiles.length} entry point(s) → ${OUT}`);
+}
diff --git a/tsconfig.client.json b/tsconfig.client.json
new file mode 100644
index 0000000..52ed033
--- /dev/null
+++ b/tsconfig.client.json
@@ -0,0 +1,31 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ES2022",
+    "moduleResolution": "bundler",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "skipLibCheck": true,
+
+    "allowJs": true,
+    "checkJs": false,
+
+    "noEmit": true,
+
+    "strict": false,
+    "noImplicitAny": false,
+    "strictNullChecks": false,
+
+    "resolveJsonModule": true,
+    "isolatedModules": true
+  },
+  "include": [
+    "client/**/*"
+  ],
+  "exclude": [
+    "node_modules",
+    "public",
+    "dist"
+  ]
+}
diff --git a/tsconfig.json b/tsconfig.json
index b0c9c15..8ff2859 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -21,7 +21,7 @@
     "isolatedModules": false
   },
   "include": [
-    "server.js",
+    "server.ts",
     "src/**/*",
     "test/**/*",
     "scripts/**/*"