From e240470d04f2a2e22e94f063a6a44bec156dc8e5 Mon Sep 17 00:00:00 2001
From: Lectom <lectom.c.han@gmail.com>
Date: Wed, 27 May 2026 12:29:56 +0900
Subject: [PATCH] =?UTF-8?q?[WIP]=EB=AA=A8=EB=B0=94=EC=9D=BC=20=EB=A1=9C?=
 =?UTF-8?q?=EA=B7=B8=EC=9D=B8=EC=B0=BD=20=ED=85=8C=EC=8A=A4=ED=8A=B8=20?=
 =?UTF-8?q?=EA=B0=95=ED=99=94=EC=A4=91?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ssologin-android-context.png                  | Bin 74408 -> 0 bytes
 ssologin-desktop-context.png                  | Bin 7367 -> 0 bytes
 ssologin-mobile.png                           | Bin 4254 -> 0 bytes
 .../lib/core/i18n/toml_asset_loader.dart      |   1 +
 userfront/lib/core/services/log_policy.dart   |  17 ++--
 userfront/scripts/dev-server.sh               |  88 +++++++++++++++++-
 userfront/scripts/optimize-web-build.mjs      |  39 +++++++-
 userfront/test/log_policy_test.dart           |   9 +-
 userfront/test/toml_asset_loader_test.dart    |   4 +
 userfront/web/index.html                      |  61 +++++++++++-
 10 files changed, 199 insertions(+), 20 deletions(-)
 delete mode 100644 ssologin-android-context.png
 delete mode 100644 ssologin-desktop-context.png
 delete mode 100644 ssologin-mobile.png

diff --git a/ssologin-android-context.png b/ssologin-android-context.png
deleted file mode 100644
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diff --git a/ssologin-desktop-context.png b/ssologin-desktop-context.png
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diff --git a/ssologin-mobile.png b/ssologin-mobile.png
deleted file mode 100644
index 8c36732bac1e98a40c6c4d7956584cf5d3f97d79..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/userfront/lib/core/i18n/toml_asset_loader.dart b/userfront/lib/core/i18n/toml_asset_loader.dart
index 4c0c9ff1..9ab97076 100644
--- a/userfront/lib/core/i18n/toml_asset_loader.dart
+++ b/userfront/lib/core/i18n/toml_asset_loader.dart
@@ -37,6 +37,7 @@ Map<String, dynamic> _normalizeFlatTranslations(Map<String, String> flatMap) =>
 
 bool _isUserfrontTranslationKey(String key) {
   return key.startsWith('domain.') ||
+      key.startsWith('err.userfront.') ||
       key.startsWith('msg.userfront.') ||
       key.startsWith('ui.userfront.') ||
       key.startsWith('ui.common.');
diff --git a/userfront/lib/core/services/log_policy.dart b/userfront/lib/core/services/log_policy.dart
index df8e3c24..0aa1b834 100644
--- a/userfront/lib/core/services/log_policy.dart
+++ b/userfront/lib/core/services/log_policy.dart
@@ -52,14 +52,11 @@ class LogPolicy {
     required String? appEnv,
     required String? productionDebugFlag,
   }) {
-    final flag = parseOptionalBoolFlag(productionDebugFlag);
-    if (flag.specified) {
-      return flag.enabled;
-    }
     if (!isProductionEnv(appEnv)) {
       return true;
     }
-    return false;
+    final flag = parseOptionalBoolFlag(productionDebugFlag);
+    return flag.specified && flag.enabled;
   }
 
   static bool shouldRelayClientLog({
@@ -67,10 +64,12 @@ class LogPolicy {
     required String? appEnv,
     required String? productionDebugFlag,
   }) {
-    if (debugEnabled(
-      appEnv: appEnv,
-      productionDebugFlag: productionDebugFlag,
-    )) {
+    final flag = parseOptionalBoolFlag(productionDebugFlag);
+    final debugRelayEnabled = isProductionEnv(appEnv)
+        ? flag.specified && flag.enabled
+        : !(flag.specified && !flag.enabled);
+
+    if (debugRelayEnabled) {
       return true;
     }
     final normalized = level.trim().toUpperCase();
diff --git a/userfront/scripts/dev-server.sh b/userfront/scripts/dev-server.sh
index 2e1691e1..a17fe2d4 100644
--- a/userfront/scripts/dev-server.sh
+++ b/userfront/scripts/dev-server.sh
@@ -5,16 +5,98 @@ cd /workspace
 /bin/sh ./scripts/sync_userfront_locales.sh
 
 cd /workspace/userfront
+USERFRONT_INTERNAL_PORT="${USERFRONT_INTERNAL_PORT:-5000}"
+USERFRONT_FLUTTER_RUN_FLAGS="${USERFRONT_FLUTTER_RUN_FLAGS:---debug}"
+USERFRONT_BOOT_WARMUP_ATTEMPTS="${USERFRONT_BOOT_WARMUP_ATTEMPTS:-120}"
+USERFRONT_BOOT_WARMUP_INTERVAL_SECONDS="${USERFRONT_BOOT_WARMUP_INTERVAL_SECONDS:-0.5}"
+USERFRONT_BOOT_WARMUP_LOCALES="${USERFRONT_BOOT_WARMUP_LOCALES:-ko en}"
+USERFRONT_BOOT_WARMUP_VIEWPORTS="${USERFRONT_BOOT_WARMUP_VIEWPORTS:-mobile:390 desktop:1440}"
+
+warm_get() {
+  path="$1"
+  locale="$2"
+  viewport="$3"
+  width="${viewport#*:}"
+  if [ "$width" = "$viewport" ]; then
+    width=""
+  fi
+
+  wget -qO- \
+    --header="Accept-Language: $locale" \
+    --header="Viewport-Width: $width" \
+    "http://127.0.0.1:${USERFRONT_INTERNAL_PORT}${path}" >/dev/null 2>&1
+}
+
+warm_userfront_once() {
+  flutter_pid="$1"
+  attempt=1
+  started_at="$(date +%s)"
+
+  while [ "$attempt" -le "$USERFRONT_BOOT_WARMUP_ATTEMPTS" ]; do
+    if wget -qO- "http://127.0.0.1:${USERFRONT_INTERNAL_PORT}/flutter_bootstrap.js" >/dev/null 2>&1; then
+      break
+    fi
+    if ! kill -0 "$flutter_pid" 2>/dev/null; then
+      echo "[userfront-boot] warmup skipped because flutter exited before readiness" >&2
+      return 0
+    fi
+    attempt=$((attempt + 1))
+    sleep "$USERFRONT_BOOT_WARMUP_INTERVAL_SECONDS"
+  done
+
+  if [ "$attempt" -gt "$USERFRONT_BOOT_WARMUP_ATTEMPTS" ]; then
+    echo "[userfront-boot] warmup skipped after ${USERFRONT_BOOT_WARMUP_ATTEMPTS} readiness attempts" >&2
+    return 0
+  fi
+
+  echo "[userfront-boot] one-shot warmup starting locales=\"${USERFRONT_BOOT_WARMUP_LOCALES}\" viewports=\"${USERFRONT_BOOT_WARMUP_VIEWPORTS}\"" >&2
+
+  for locale in $USERFRONT_BOOT_WARMUP_LOCALES; do
+    for viewport in $USERFRONT_BOOT_WARMUP_VIEWPORTS; do
+      warm_get "/${locale}/signin" "$locale" "$viewport" || true
+    done
+  done
+
+  for asset in \
+    / \
+    /flutter_bootstrap.js \
+    /main.dart.mjs \
+    /main.dart.wasm \
+    /canvaskit/skwasm.js \
+    /canvaskit/skwasm.wasm \
+    /canvaskit/skwasm_heavy.js \
+    /canvaskit/skwasm_heavy.wasm \
+    /assets/AssetManifest.bin.json \
+    /assets/FontManifest.json
+  do
+    wget -qO- "http://127.0.0.1:${USERFRONT_INTERNAL_PORT}${asset}" >/dev/null 2>&1 || true
+  done
+
+  finished_at="$(date +%s)"
+  elapsed_seconds=$((finished_at - started_at))
+  echo "[userfront-boot] one-shot warmup completed in ${elapsed_seconds}s" >&2
+}
+
 set -- flutter run \
   -d web-server \
   --web-hostname 0.0.0.0 \
-  --web-port "${USERFRONT_INTERNAL_PORT:-5000}" \
+  --web-port "${USERFRONT_INTERNAL_PORT}" \
   --wasm \
   --dart-define=BACKEND_URL="${BACKEND_URL:-}" \
   --dart-define=CLIENT_LOG_DEBUG="${CLIENT_LOG_DEBUG:-false}" \
   --dart-define=APP_ENV="${APP_ENV:-dev}" \
   --dart-define=USERFRONT_URL="${USERFRONT_URL:-}" \
-  ${USERFRONT_FLUTTER_RUN_FLAGS:-} \
+  ${USERFRONT_FLUTTER_RUN_FLAGS} \
   --no-web-resources-cdn
 
-exec "$@"
+"$@" &
+flutter_pid="$!"
+
+terminate() {
+  kill "$flutter_pid" 2>/dev/null || true
+  wait "$flutter_pid" 2>/dev/null || true
+}
+
+trap terminate INT TERM
+warm_userfront_once "$flutter_pid"
+wait "$flutter_pid"
diff --git a/userfront/scripts/optimize-web-build.mjs b/userfront/scripts/optimize-web-build.mjs
index 5de34a56..75a03f95 100644
--- a/userfront/scripts/optimize-web-build.mjs
+++ b/userfront/scripts/optimize-web-build.mjs
@@ -78,15 +78,18 @@ const canvasKitConfig = 'config:{canvasKitBaseUrl:"canvaskit/"}';
 
 bootstrap = bootstrap.replace(
   /_flutter\.loader\.load\(\{\s*serviceWorkerSettings:\s*(\{[^{}]*\})\s*,\s*config:\s*\{[\s\S]*?serviceWorkerUrl[\s\S]*?\}\s*,\s*config:\s*\{[^}]*\}\s*\}\);/g,
-  `_flutter.loader.load({${canvasKitConfig}});`,
+  (_match, settings) =>
+    `_flutter.loader.load({serviceWorkerSettings:${ensureServiceWorkerUrl(settings)},${canvasKitConfig}});`,
 );
 bootstrap = bootstrap.replace(
   /_flutter\.loader\.load\(\{\s*serviceWorkerSettings:\s*(\{[^{}]*\})\s*,\s*config:\s*\{[^}]*\}\s*\}\);/g,
-  `_flutter.loader.load({${canvasKitConfig}});`,
+  (_match, settings) =>
+    `_flutter.loader.load({serviceWorkerSettings:${ensureServiceWorkerUrl(settings)},${canvasKitConfig}});`,
 );
 bootstrap = bootstrap.replace(
   /_flutter\.loader\.load\(\{\s*serviceWorkerSettings:\s*(\{[^{}]*\})\s*\}\);/g,
-  `_flutter.loader.load({${canvasKitConfig}});`,
+  (_match, settings) =>
+    `_flutter.loader.load({serviceWorkerSettings:${ensureServiceWorkerUrl(settings)},${canvasKitConfig}});`,
 );
 bootstrap = bootstrap.replace(
   /_flutter\.loader\.load\(\);/g,
@@ -302,4 +305,34 @@ async function cacheFirst(request) {
 `;
 }
 
+function ensureServiceWorkerUrl(settings) {
+  const serviceWorkerUrl = `"/flutter_service_worker.js?v=" + ${serviceWorkerVersionExpression(settings)}`;
+  if (/serviceWorkerUrl\s*:/.test(settings)) {
+    return settings.replace(
+      /serviceWorkerUrl\s*:\s*[^,\n}]+,?/,
+      `serviceWorkerUrl: ${serviceWorkerUrl},`,
+    );
+  }
+
+  const closingBraceIndex = settings.lastIndexOf('}');
+  if (closingBraceIndex < 0) {
+    return settings;
+  }
+  const beforeClosing = settings.slice(0, closingBraceIndex).trimEnd();
+  const afterClosing = settings.slice(closingBraceIndex);
+  const separator =
+    beforeClosing.endsWith('{') || beforeClosing.endsWith(',') ? '' : ',';
+  return `${beforeClosing}${separator}
+    serviceWorkerUrl: ${serviceWorkerUrl},
+  ${afterClosing}`;
+}
+
+function serviceWorkerVersionExpression(settings) {
+  const match = settings.match(/serviceWorkerVersion\s*:\s*([^,\n}]+)/);
+  return (
+    match?.[1]?.replace(/\/\*[\s\S]*?\*\//g, '').trim() ??
+    'serviceWorkerVersion'
+  );
+}
+
 console.log(`[userfront] optimized ${basename(buildDir)} with hashed entrypoints and brotli assets`);
diff --git a/userfront/test/log_policy_test.dart b/userfront/test/log_policy_test.dart
index f53e69a8..fb8a49ec 100644
--- a/userfront/test/log_policy_test.dart
+++ b/userfront/test/log_policy_test.dart
@@ -14,7 +14,7 @@ void main() {
       );
     });
 
-    test('explicit debug flag applies in development-like environment', () {
+    test('explicit true enables debug in development-like environment', () {
       expect(
         LogPolicy.debugEnabled(appEnv: 'dev', productionDebugFlag: 'true'),
         isTrue,
@@ -23,13 +23,16 @@ void main() {
         LogPolicy.debugEnabled(appEnv: 'development', productionDebugFlag: '1'),
         isTrue,
       );
+    });
+
+    test('explicit false does not suppress local debug in development', () {
       expect(
         LogPolicy.debugEnabled(appEnv: 'dev', productionDebugFlag: 'false'),
-        isFalse,
+        isTrue,
       );
       expect(
         LogPolicy.debugEnabled(appEnv: 'development', productionDebugFlag: '0'),
-        isFalse,
+        isTrue,
       );
     });
 
diff --git a/userfront/test/toml_asset_loader_test.dart b/userfront/test/toml_asset_loader_test.dart
index 313fe4e6..f66294bf 100644
--- a/userfront/test/toml_asset_loader_test.dart
+++ b/userfront/test/toml_asset_loader_test.dart
@@ -43,6 +43,10 @@ void main() {
 
       expect(translations['ui.admin.nav.api_keys'], isNull);
       expect(translations['ui.dev.console_title'], isNull);
+      expect(
+        translations['err.userfront.auth_proxy.login_failed'],
+        'Login failed.',
+      );
       expect(translations['ui.userfront.login.action.submit'], 'Sign in');
       expect(translations['ui.common.theme_light'], 'Light');
     },
diff --git a/userfront/web/index.html b/userfront/web/index.html
index 2950294f..a8f5692d 100644
--- a/userfront/web/index.html
+++ b/userfront/web/index.html
@@ -122,7 +122,7 @@
     </main>
     <script>
       var baronBootstrapStartedAt = performance.now();
-      var baronMinimumShellMs = 1100;
+      var baronMinimumShellMs = 0;
       window.addEventListener("flutter-first-frame", function () {
         var elapsedMs = performance.now() - baronBootstrapStartedAt;
         window.setTimeout(
@@ -136,6 +136,63 @@
         );
       });
     </script>
-    <script src="flutter_bootstrap.js" async></script>
+    <script>
+      (function () {
+        function loadFlutter() {
+          var script = document.createElement("script");
+          script.src = "flutter_bootstrap.js";
+          script.async = true;
+          document.body.appendChild(script);
+        }
+
+        var hostname = window.location.hostname;
+        var isLocalhost =
+          hostname === "localhost" || hostname === "127.0.0.1" || hostname === "::1";
+        if (!isLocalhost || !("serviceWorker" in navigator)) {
+          loadFlutter();
+          return;
+        }
+
+        navigator.serviceWorker
+          .getRegistrations()
+          .then(function (registrations) {
+            return Promise.all(
+              registrations.map(function (registration) {
+                return registration.unregister();
+              }),
+            );
+          })
+          .then(function () {
+            if (!window.caches) {
+              return;
+            }
+            return caches.keys().then(function (keys) {
+              return Promise.all(
+                keys
+                  .filter(function (key) {
+                    return (
+                      key.indexOf("baron-userfront-") === 0 ||
+                      key.indexOf("flutter-app-cache") === 0
+                    );
+                  })
+                  .map(function (key) {
+                    return caches.delete(key);
+                  }),
+              );
+            });
+          })
+          .then(function () {
+            if (navigator.serviceWorker.controller) {
+              window.location.reload();
+              return;
+            }
+            loadFlutter();
+          })
+          .catch(function (error) {
+            console.warn("[baron] failed to clear local service worker", error);
+            loadFlutter();
+          });
+      })();
+    </script>
   </body>
 </html>