diff --git a/.jules/bolt.md b/.jules/bolt.md
index b08b203a..dd876299 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -4,3 +4,6 @@
 ## 2026-07-12 - Optimize renderTaskRow DOM allocations
 **Learning:** Caching unattached template nodes and instantiating them via `.cloneNode(false)` reduces DOM instantiation overhead in O(N) render loops significantly.
 **Action:** Apply this optimization to other hot-path rendering elements such as rows, cells, and stack containers.
+## 2026-07-12 - Inline ternary concatenation vs String.padStart()
+**Learning:** Using `String.padStart()` in O(N) hot loops (like date formatters) creates unnecessary string allocations and JS-to-C++ overhead.
+**Action:** Prefer using inline ternary string concatenation (e.g., `m < 10 ? '0' : ''`) for simple string formatting in performance-critical paths to reduce GC pressure and execution time.
diff --git a/app.js b/app.js
index a04aae71..aaa9584c 100644
--- a/app.js
+++ b/app.js
@@ -2682,22 +2682,27 @@ function clamp(value, min, max) {
   return Math.min(max, Math.max(min, value));
 }
 
+// ⚡ Bolt: 불필요한 문자열 할당 및 JS-to-C++ 오버헤드를 방지하기 위해
+// O(N) 반복 구간(hot path)에서 String.padStart() 대신 인라인 삼항 연산자를 사용합니다.
 function formatDateInput(date) {
   const year = date.getUTCFullYear();
-  const month = String(date.getUTCMonth() + 1).padStart(2, '0');
-  const day = String(date.getUTCDate()).padStart(2, '0');
-  return `${year}-${month}-${day}`;
+  const m = date.getUTCMonth() + 1;
+  const d = date.getUTCDate();
+  return `${year}-${m < 10 ? '0' : ''}${m}-${d < 10 ? '0' : ''}${d}`;
 }
 
 function formatLocalDateInput(date) {
   const year = date.getFullYear();
-  const month = String(date.getMonth() + 1).padStart(2, '0');
-  const day = String(date.getDate()).padStart(2, '0');
-  return `${year}-${month}-${day}`;
+  const m = date.getMonth() + 1;
+  const d = date.getDate();
+  return `${year}-${m < 10 ? '0' : ''}${m}-${d < 10 ? '0' : ''}${d}`;
 }
 
 function formatCompactDate(date) {
-  return `${date.getFullYear()}${String(date.getMonth() + 1).padStart(2, '0')}${String(date.getDate()).padStart(2, '0')}`;
+  const y = date.getFullYear();
+  const m = date.getMonth() + 1;
+  const d = date.getDate();
+  return `${y}${m < 10 ? '0' : ''}${m}${d < 10 ? '0' : ''}${d}`;
 }
 
 function formatPercent(value, digits) {
diff --git a/index.html b/index.html
index a7f4b49c..cda50f78 100644
--- a/index.html
+++ b/index.html
@@ -6,6 +6,8 @@
     <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; object-src 'none'; base-uri 'none'; form-action 'self';" />
     <title>ScopeWeave Planner</title>
     <link rel="preload" href="styles.css" as="style" />
+    <link rel="modulepreload" href="cloud-sync.js" />
+    <link rel="modulepreload" href="analytics.js" />
     <link rel="modulepreload" href="app.js" />
     <link rel="stylesheet" href="styles.css" />
   </head>
diff --git a/package-lock.json b/package-lock.json
index 079e2031..a1c5e22b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "dependencies": {
         "@hono/node-server": "^2.0.12",
-        "hono": "^4.12.32"
+        "hono": "^4.13.1"
       },
       "devDependencies": {
         "@playwright/test": "1.61.1",
@@ -31,9 +31,9 @@
       }
     },
     "node_modules/@hono/node-server": {
-      "version": "2.0.12",
-      "resolved": "https://registry.npmjs.org/@hono/node-server/-/node-server-2.0.12.tgz",
-      "integrity": "sha512-eWpQYr67tqJLeaSUl0Q+TquuYfUdTibpOJlUMV2FfUP7+KqCC5TufnwnlXL6mobZBJbGAYRd7ZvEBDCbLInjhg==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/@hono/node-server/-/node-server-2.1.0.tgz",
+      "integrity": "sha512-XovyyCCnBzW+zKu+z/zq8hwNs4KOR5rEMAOxo2f40Q5xoOI37IMm6MIg2COOUtUApo0i6850MTBKH2u4QLGIqg==",
       "license": "MIT",
       "engines": {
         "node": ">=20"
@@ -382,9 +382,9 @@
       }
     },
     "node_modules/hono": {
-      "version": "4.12.32",
-      "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.32.tgz",
-      "integrity": "sha512-XcuyW9qE2kJn07PkecMOBd5Vq/hMy7mmGw+idz1yblbg9N17ijJODrvPkn7/dwL3Kulj8LcRJ69DLOWf91dRUg==",
+      "version": "4.13.1",
+      "resolved": "https://registry.npmjs.org/hono/-/hono-4.13.1.tgz",
+      "integrity": "sha512-kdJoFVv2xmayw6cY09H7AbMJMt8Jn5jdlEdXsP7AGBdF2DIptVlKlOLKXP41yPip4/a3yQPv9gVcJYI8YY04dw==",
       "license": "MIT",
       "engines": {
         "node": ">=16.9.0"
diff --git a/package.json b/package.json
index 7790e678..65735b6f 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   },
   "dependencies": {
     "@hono/node-server": "^2.0.12",
-    "hono": "^4.12.32"
+    "hono": "^4.13.1"
   },
   "devDependencies": {
     "@playwright/test": "1.61.1",