diff --git a/static/boot.js b/static/boot.js
index 1781f973..98054a13 100644
--- a/static/boot.js
+++ b/static/boot.js
@@ -2261,7 +2261,30 @@ window._applyTitlebarProfileVisibility=_applyTitlebarProfileVisibility;
     api(_checkUrl,{method:_testUpdates?'GET':'POST',body:_testUpdates?undefined:JSON.stringify({force:false})}).then(d=>{if(!_testUpdates)sessionStorage.setItem('hermes-update-checked','1');if((d.webui&&d.webui.behind>0)||(d.agent&&d.agent.behind>0))_showUpdateBanner(d);}).catch(()=>{});
   }
   async function _resolveActiveProfileBootstrapState({
-    loadActiveProfile = () => api('/api/profile/active'),
+    loadActiveProfile = async () => {
+      const rel = 'api/profile/active';
+      const url = new URL(rel, document.baseURI || location.href);
+      const res = await fetch(url.href, {
+        credentials: 'include',
+        headers: {'Content-Type': 'application/json'},
+      });
+      if (res.status === 401) return undefined;
+      if (!res.ok) {
+        const text = await res.text();
+        let message = text;
+        try {
+          const j = JSON.parse(text);
+          message = j.error || j.message || text;
+        } catch (_) {}
+        const err = new Error(message);
+        err.status = res.status;
+        err.statusText = res.statusText;
+        err.body = text;
+        throw err;
+      }
+      const ct = res.headers.get('content-type') || '';
+      return ct.includes('application/json') ? await res.json() : await res.text();
+    },
     getNextUrl = () => window.location.pathname + window.location.search,
     redirectToLogin = (nextUrl) => {
       window.location.href = 'login?next=' + encodeURIComponent(nextUrl);
diff --git a/tests/test_5001_active_profile_recovery.py b/tests/test_5001_active_profile_recovery.py
index c4aca6ba..f1f36b12 100644
--- a/tests/test_5001_active_profile_recovery.py
+++ b/tests/test_5001_active_profile_recovery.py
@@ -91,6 +91,30 @@ function makeAttempt(attempt) {
   };
 }
 
+function makeFetchResponse(attempt) {
+  const status = attempt.status === undefined ? 200 : attempt.status;
+  const payload = Object.prototype.hasOwnProperty.call(attempt, 'payload')
+    ? attempt.payload
+    : {name: 'default', is_default: true};
+  const textBody = Object.prototype.hasOwnProperty.call(attempt, 'text')
+    ? attempt.text
+    : JSON.stringify(payload);
+  return {
+    ok: status >= 200 && status < 300,
+    status,
+    statusText: attempt.statusText || '',
+    headers: {
+      get(name) {
+        return String(name).toLowerCase() === 'content-type'
+          ? attempt.contentType || 'application/json'
+          : '';
+      },
+    },
+    json: async () => payload,
+    text: async () => textBody,
+  };
+}
+
 eval(extractFunction(bootSrc, '_resolveActiveProfileBootstrapState'));
 const bootActiveProfileBlock = extractBlock(
   bootSrc,
@@ -120,15 +144,52 @@ return (async () => {
   const storageHistory = [];
 
   for (const attempt of attempts) {
-    const state = await _resolveActiveProfileBootstrapState({
-      loadActiveProfile: makeAttempt(attempt),
-      markerStorage: storage,
-      markerKey,
-      getNextUrl: () => attempt.nextUrl || '/',
-      redirectToLogin: (nextUrl) => {
-        redirectUrls.push(`login?next=${encodeURIComponent(nextUrl)}`);
-      },
-    });
+    const nextUrl = attempt.nextUrl || '/';
+    const originalFetch = globalThis.fetch;
+    const originalWindow = globalThis.window;
+    const originalLocation = globalThis.location;
+    const originalDocument = globalThis.document;
+    let state;
+
+    try {
+      if (scenario.useDefaultLoader) {
+        const location = {
+          href: `http://example.test${nextUrl}`,
+          pathname: nextUrl,
+          search: '',
+        };
+        globalThis.fetch = async () => makeFetchResponse(attempt);
+        globalThis.location = location;
+        globalThis.document = {baseURI: 'http://example.test/'};
+        globalThis.window = {location};
+        state = await _resolveActiveProfileBootstrapState({
+          markerStorage: storage,
+          markerKey,
+          getNextUrl: () => nextUrl,
+          redirectToLogin: (value) => {
+            const href = `login?next=${encodeURIComponent(value)}`;
+            redirectUrls.push(href);
+            location.href = href;
+          },
+        });
+      } else {
+        state = await _resolveActiveProfileBootstrapState({
+          loadActiveProfile: makeAttempt(attempt),
+          markerStorage: storage,
+          markerKey,
+          getNextUrl: () => nextUrl,
+          redirectToLogin: (value) => {
+            redirectUrls.push(`login?next=${encodeURIComponent(value)}`);
+          },
+        });
+      }
+    } finally {
+      globalThis.fetch = originalFetch;
+      globalThis.window = originalWindow;
+      globalThis.location = originalLocation;
+      globalThis.document = originalDocument;
+    }
+
     const bootState = {};
     let applyBotNameCalls = 0;
     const bootResult = await runBootActiveProfileBlock(
@@ -194,9 +255,10 @@ def test_active_profile_boot_recovery_is_one_shot_and_bounded(driver_path):
         driver_path,
         {
             "markerKey": "test-5001-active-profile-recovery",
+            "useDefaultLoader": True,
             "attempts": [
-                {"type": "undefined", "nextUrl": "/"},
-                {"type": "undefined", "nextUrl": "/"},
+                {"status": 401, "payload": {"error": "Authentication required"}, "nextUrl": "/"},
+                {"status": 401, "payload": {"error": "Authentication required"}, "nextUrl": "/"},
             ],
         },
     )
@@ -255,8 +317,9 @@ def test_active_profile_boot_non_401_errors_fallback_without_redirect(driver_pat
         driver_path,
         {
             "markerKey": "test-5001-active-profile-recovery-non-401",
+            "useDefaultLoader": True,
             "attempts": [
-                {"type": "error", "status": 500, "nextUrl": "/"},
+                {"status": 500, "payload": {"error": "server failure"}, "nextUrl": "/"},
             ],
         },
     )
@@ -278,8 +341,9 @@ def test_active_profile_boot_invalid_payload_falls_back_without_redirect(driver_
         driver_path,
         {
             "markerKey": "test-5001-active-profile-recovery-invalid-payload",
+            "useDefaultLoader": True,
             "attempts": [
-                {"type": "return", "value": {"is_default": False}, "nextUrl": "/"},
+                {"status": 200, "payload": {"is_default": False}, "nextUrl": "/"},
             ],
         },
     )
@@ -301,10 +365,10 @@ def test_active_profile_success_path_applies_boot_state_and_continues(driver_pat
         driver_path,
         {
             "markerKey": "test-5001-active-profile-recovery-success",
-            "simulateBootContinue": True,
+            "useDefaultLoader": True,
             "attempts": [
                 {
-                    "type": "success",
+                    "status": 200,
                     "payload": {"name": "team-profile", "is_default": False},
                 }
             ],
diff --git a/tests/test_issue1116_composer_placeholder.py b/tests/test_issue1116_composer_placeholder.py
index 2ec1415c..f24c023c 100644
--- a/tests/test_issue1116_composer_placeholder.py
+++ b/tests/test_issue1116_composer_placeholder.py
@@ -53,8 +53,8 @@ class TestComposerPlaceholderProfile:
     def test_boot_applies_placeholder_after_active_profile_loads(self):
         """Boot must set the composer placeholder after S.activeProfile is known."""
         src = _src("boot.js")
-        fetch_idx = src.find("api('/api/profile/active')")
-        assert fetch_idx >= 0, "boot.js should fetch the active profile during boot"
+        fetch_idx = src.find("const activeProfileState = await _resolveActiveProfileBootstrapState();")
+        assert fetch_idx >= 0, "boot.js should resolve the active profile during boot"
         label_idx = src.find("const profileLabel=$('profileChipLabel');", fetch_idx)
         assert label_idx >= 0, "profile chip sync should follow active profile fetch"
         assert "applyBotName();" in src[fetch_idx:label_idx], (