diff --git a/core/http/react-ui/src/pages/Account.jsx b/core/http/react-ui/src/pages/Account.jsx
index 8f9f3d028..84d48c578 100644
--- a/core/http/react-ui/src/pages/Account.jsx
+++ b/core/http/react-ui/src/pages/Account.jsx
@@ -4,6 +4,7 @@ import { useTranslation } from 'react-i18next'
 import { useAuth } from '../context/AuthContext'
 import { apiKeysApi, profileApi } from '../utils/api'
 import LoadingSpinner from '../components/LoadingSpinner'
+import PageHeader from '../components/PageHeader'
 import SettingRow from '../components/SettingRow'
 import ConfirmDialog from '../components/ConfirmDialog'
 import './auth.css'
@@ -452,10 +453,7 @@ export default function Account() {
   return (
     <div className="page page--narrow account-page">
       {/* Header */}
-      <div className="page-header">
-        <h1 className="page-title">{t('account.title')}</h1>
-        <p className="page-subtitle">{t('account.subtitle')}</p>
-      </div>
+      <PageHeader title={t('account.title')} supporting={t('account.subtitle')} />
 
       {/* Tab bar */}
       <div className="auth-tab-bar auth-tab-bar--flush">
diff --git a/core/http/react-ui/src/pages/AgentCreate.jsx b/core/http/react-ui/src/pages/AgentCreate.jsx
index b7b79dd22..825a590ca 100644
--- a/core/http/react-ui/src/pages/AgentCreate.jsx
+++ b/core/http/react-ui/src/pages/AgentCreate.jsx
@@ -2,6 +2,7 @@ import { useState, useEffect, useMemo } from 'react'
 import { useParams, useNavigate, useLocation, useOutletContext, useSearchParams } from 'react-router-dom'
 import { agentsApi, skillsApi } from '../utils/api'
 import SearchableModelSelect from '../components/SearchableModelSelect'
+import PageHeader from '../components/PageHeader'
 import { CAP_CHAT, CAP_TRANSCRIPT, CAP_TTS } from '../utils/capabilities'
 import Toggle from '../components/Toggle'
 import SettingRow from '../components/SettingRow'
@@ -930,12 +931,14 @@ export default function AgentCreate() {
         }
       `}</style>
 
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-        <h1 className="page-title">{isEdit ? `Edit Agent: ${name}` : importedConfig ? 'Import Agent' : 'Create Agent'}</h1>
-        <button className="btn btn-secondary btn-sm" onClick={() => navigate('/app/agents')}>
-          <i className="fas fa-arrow-left" /> Back
-        </button>
-      </div>
+      <PageHeader
+        title={isEdit ? `Edit Agent: ${name}` : importedConfig ? 'Import Agent' : 'Create Agent'}
+        actions={
+          <button className="btn btn-secondary btn-sm" onClick={() => navigate('/app/agents')}>
+            <i className="fas fa-arrow-left" /> Back
+          </button>
+        }
+      />
 
       <form onSubmit={handleSubmit} noValidate>
         <div className="agent-form-container">
diff --git a/core/http/react-ui/src/pages/AgentJobDetails.jsx b/core/http/react-ui/src/pages/AgentJobDetails.jsx
index e4386ce12..52854a4d4 100644
--- a/core/http/react-ui/src/pages/AgentJobDetails.jsx
+++ b/core/http/react-ui/src/pages/AgentJobDetails.jsx
@@ -2,6 +2,7 @@ import { useState, useEffect, useRef } from 'react'
 import { useParams, useNavigate, useOutletContext } from 'react-router-dom'
 import { agentJobsApi } from '../utils/api'
 import LoadingSpinner from '../components/LoadingSpinner'
+import PageHeader from '../components/PageHeader'
 
 const traceColors = {
   reasoning: { bg: 'rgba(99,102,241,0.1)', border: 'rgba(99,102,241,0.3)', icon: 'fa-brain', color: 'var(--color-primary)' },
@@ -178,22 +179,22 @@ export default function AgentJobDetails() {
 
   return (
     <div className="page page--narrow">
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-        <div>
-          <h1 className="page-title">Job Details</h1>
-          <p className="page-subtitle">Live status and reasoning traces</p>
-        </div>
-        <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
-          {(job.status === 'running' || job.status === 'pending') && (
-            <button className="btn btn-danger" onClick={handleCancel}>
-              <i className="fas fa-stop" /> Cancel
+      <PageHeader
+        title="Job Details"
+        supporting="Live status and reasoning traces"
+        actions={
+          <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
+            {(job.status === 'running' || job.status === 'pending') && (
+              <button className="btn btn-danger" onClick={handleCancel}>
+                <i className="fas fa-stop" /> Cancel
+              </button>
+            )}
+            <button className="btn btn-secondary" onClick={() => navigate('/app/agent-jobs')}>
+              <i className="fas fa-arrow-left" /> Back
             </button>
-          )}
-          <button className="btn btn-secondary" onClick={() => navigate('/app/agent-jobs')}>
-            <i className="fas fa-arrow-left" /> Back
-          </button>
-        </div>
-      </div>
+          </div>
+        }
+      />
 
       {/* Status Card */}
       <div className="card" style={{ marginBottom: 'var(--spacing-md)' }}>
diff --git a/core/http/react-ui/src/pages/AgentJobs.jsx b/core/http/react-ui/src/pages/AgentJobs.jsx
index 8b9d9b3eb..907f5e81d 100644
--- a/core/http/react-ui/src/pages/AgentJobs.jsx
+++ b/core/http/react-ui/src/pages/AgentJobs.jsx
@@ -6,6 +6,7 @@ import { useModels } from '../hooks/useModels'
 import { useAuth } from '../context/AuthContext'
 import { useUserMap } from '../hooks/useUserMap'
 import LoadingSpinner from '../components/LoadingSpinner'
+import PageHeader from '../components/PageHeader'
 import { fileToBase64 } from '../utils/api'
 import Modal from '../components/Modal'
 import UserGroupSection from '../components/UserGroupSection'
@@ -216,10 +217,7 @@ export default function AgentJobs() {
   if (!loading && models.length === 0) {
     return (
       <div className="page page--wide">
-        <div className="page-header">
-          <h1 className="page-title">Agent Jobs</h1>
-          <p className="page-subtitle">Manage agent tasks and automated workflows</p>
-        </div>
+        <PageHeader title="Agent Jobs" supporting="Manage agent tasks and automated workflows" />
         <div className="card" style={{ textAlign: 'center', padding: 'var(--spacing-xl)' }}>
           <i className="fas fa-exclamation-triangle" style={{ fontSize: '3rem', color: 'var(--color-warning)', marginBottom: 'var(--spacing-md)' }} />
           <h2 style={{ marginBottom: 'var(--spacing-sm)' }}>No Models Installed</h2>
@@ -243,10 +241,7 @@ export default function AgentJobs() {
   if (!loading && models.length > 0 && !hasMCPModels && tasks.length === 0) {
     return (
       <div className="page page--wide">
-        <div className="page-header">
-          <h1 className="page-title">Agent Jobs</h1>
-          <p className="page-subtitle">Manage agent tasks and automated workflows</p>
-        </div>
+        <PageHeader title="Agent Jobs" supporting="Manage agent tasks and automated workflows" />
         <div className="card" style={{ textAlign: 'center', padding: 'var(--spacing-xl)' }}>
           <i className="fas fa-plug" style={{ fontSize: '3rem', color: 'var(--color-primary)', marginBottom: 'var(--spacing-md)' }} />
           <h2 style={{ marginBottom: 'var(--spacing-sm)' }}>MCP Not Configured</h2>
@@ -276,15 +271,15 @@ export default function AgentJobs() {
 
   return (
     <div className="page page--wide">
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-        <div>
-          <h1 className="page-title">Agent Jobs</h1>
-          <p className="page-subtitle">Manage agent tasks and automated workflows</p>
-        </div>
-        <button className="btn btn-primary" onClick={() => navigate('/app/agent-jobs/tasks/new')}>
-          <i className="fas fa-plus" /> New Task
-        </button>
-      </div>
+      <PageHeader
+        title="Agent Jobs"
+        supporting="Manage agent tasks and automated workflows"
+        actions={
+          <button className="btn btn-primary" onClick={() => navigate('/app/agent-jobs/tasks/new')}>
+            <i className="fas fa-plus" /> New Task
+          </button>
+        }
+      />
 
       <div className="tabs">
         <button className={`tab ${activeTab === 'tasks' ? 'tab-active' : ''}`} onClick={() => setActiveTab('tasks')}>
diff --git a/core/http/react-ui/src/pages/AgentStatus.jsx b/core/http/react-ui/src/pages/AgentStatus.jsx
index b58b6790d..c3acf0bec 100644
--- a/core/http/react-ui/src/pages/AgentStatus.jsx
+++ b/core/http/react-ui/src/pages/AgentStatus.jsx
@@ -2,6 +2,7 @@ import { useState, useEffect, useCallback } from 'react'
 import { useParams, useNavigate, useOutletContext, useSearchParams } from 'react-router-dom'
 import { agentsApi } from '../utils/api'
 import { apiUrl } from '../utils/basePath'
+import PageHeader from '../components/PageHeader'
 
 function ObservableSummary({ observable }) {
   const creation = observable?.creation || {}
@@ -352,29 +353,26 @@ export default function AgentStatus() {
         .as-status-value { font-size: 1rem; font-weight: 600; color: var(--color-text-primary); }
       `}</style>
 
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-        <div>
-          <h1 className="page-title">
-            <i className="fas fa-chart-bar" style={{ marginRight: 'var(--spacing-xs)' }} />
-            {name} — Status
-          </h1>
-          <p className="page-subtitle">Agent observables and activity history</p>
-        </div>
-        <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
-          <button className="btn btn-secondary" onClick={() => navigate(`/app/agents/${encodeURIComponent(name)}/chat${userId ? `?user_id=${encodeURIComponent(userId)}` : ''}`)}>
-            <i className="fas fa-comment" /> Chat
-          </button>
-          <button className="btn btn-secondary" onClick={() => navigate(`/app/agents/${encodeURIComponent(name)}/edit${userId ? `?user_id=${encodeURIComponent(userId)}` : ''}`)}>
-            <i className="fas fa-edit" /> Edit
-          </button>
-          <button className="btn btn-secondary" onClick={fetchData}>
-            <i className="fas fa-sync" /> Refresh
-          </button>
-          <button className="btn btn-danger" onClick={handleClear} disabled={observables.length === 0}>
-            <i className="fas fa-trash" /> Clear
-          </button>
-        </div>
-      </div>
+      <PageHeader
+        title={<><i className="fas fa-chart-bar" style={{ marginRight: 'var(--spacing-xs)' }} />{name} — Status</>}
+        supporting="Agent observables and activity history"
+        actions={
+          <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
+            <button className="btn btn-secondary" onClick={() => navigate(`/app/agents/${encodeURIComponent(name)}/chat${userId ? `?user_id=${encodeURIComponent(userId)}` : ''}`)}>
+              <i className="fas fa-comment" /> Chat
+            </button>
+            <button className="btn btn-secondary" onClick={() => navigate(`/app/agents/${encodeURIComponent(name)}/edit${userId ? `?user_id=${encodeURIComponent(userId)}` : ''}`)}>
+              <i className="fas fa-edit" /> Edit
+            </button>
+            <button className="btn btn-secondary" onClick={fetchData}>
+              <i className="fas fa-sync" /> Refresh
+            </button>
+            <button className="btn btn-danger" onClick={handleClear} disabled={observables.length === 0}>
+              <i className="fas fa-trash" /> Clear
+            </button>
+          </div>
+        }
+      />
 
       {/* Status summary */}
       {status && (
diff --git a/core/http/react-ui/src/pages/AgentTaskDetails.jsx b/core/http/react-ui/src/pages/AgentTaskDetails.jsx
index 722c8c3a1..c07ddfd6f 100644
--- a/core/http/react-ui/src/pages/AgentTaskDetails.jsx
+++ b/core/http/react-ui/src/pages/AgentTaskDetails.jsx
@@ -3,6 +3,7 @@ import { useParams, useNavigate, useOutletContext, useLocation } from 'react-rou
 import { agentJobsApi } from '../utils/api'
 import { basePath } from '../utils/basePath'
 import ModelSelector from '../components/ModelSelector'
+import PageHeader from '../components/PageHeader'
 import { CAP_CHAT } from '../utils/capabilities'
 import LoadingSpinner from '../components/LoadingSpinner'
 
@@ -165,20 +166,20 @@ export default function AgentTaskDetails() {
   if (!isNew && !isEdit) {
     return (
       <div className="page page--narrow">
-        <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-          <div>
-            <h1 className="page-title">{task.name || 'Task Details'}</h1>
-            {task.description && <p className="page-subtitle">{task.description}</p>}
-          </div>
-          <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
-            <button className="btn btn-primary btn-sm" onClick={() => navigate(`/app/agent-jobs/tasks/${id}/edit`)}>
-              <i className="fas fa-edit" /> Edit
-            </button>
-            <button className="btn btn-secondary btn-sm" onClick={() => navigate('/app/agent-jobs')}>
-              <i className="fas fa-arrow-left" /> Back
-            </button>
-          </div>
-        </div>
+        <PageHeader
+          title={task.name || 'Task Details'}
+          supporting={task.description || undefined}
+          actions={
+            <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
+              <button className="btn btn-primary btn-sm" onClick={() => navigate(`/app/agent-jobs/tasks/${id}/edit`)}>
+                <i className="fas fa-edit" /> Edit
+              </button>
+              <button className="btn btn-secondary btn-sm" onClick={() => navigate('/app/agent-jobs')}>
+                <i className="fas fa-arrow-left" /> Back
+              </button>
+            </div>
+          }
+        />
 
         {/* Task Info */}
         <div className="card" style={{ marginBottom: 'var(--spacing-md)' }}>
@@ -307,12 +308,14 @@ export default function AgentTaskDetails() {
   // Edit/Create form
   return (
     <div className="page page--narrow">
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-        <h1 className="page-title">{isNew ? 'Create Task' : 'Edit Task'}</h1>
-        <button className="btn btn-secondary btn-sm" onClick={() => navigate('/app/agent-jobs')}>
-          <i className="fas fa-arrow-left" /> Back
-        </button>
-      </div>
+      <PageHeader
+        title={isNew ? 'Create Task' : 'Edit Task'}
+        actions={
+          <button className="btn btn-secondary btn-sm" onClick={() => navigate('/app/agent-jobs')}>
+            <i className="fas fa-arrow-left" /> Back
+          </button>
+        }
+      />
 
       <form onSubmit={handleSave}>
         {/* Basic Info */}
diff --git a/core/http/react-ui/src/pages/Agents.jsx b/core/http/react-ui/src/pages/Agents.jsx
index 0070f1917..95bbc9afa 100644
--- a/core/http/react-ui/src/pages/Agents.jsx
+++ b/core/http/react-ui/src/pages/Agents.jsx
@@ -5,6 +5,7 @@ import { agentsApi } from '../utils/api'
 import { useAuth } from '../context/AuthContext'
 import { useUserMap } from '../hooks/useUserMap'
 import UserGroupSection from '../components/UserGroupSection'
+import PageHeader from '../components/PageHeader'
 import ConfirmDialog from '../components/ConfirmDialog'
 
 export default function Agents() {
@@ -181,26 +182,26 @@ export default function Agents() {
         }
       `}</style>
 
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-        <div>
-          <h1 className="page-title">{t('title')}</h1>
-          <p className="page-subtitle">{t('subtitle')}</p>
-        </div>
-        <div style={{ display: 'flex', gap: 'var(--spacing-sm)', alignItems: 'center' }}>
-          {agentHubURL && (
-            <a className="btn btn-secondary" href={agentHubURL} target="_blank" rel="noopener noreferrer">
-              <i className="fas fa-store" /> {t('actions.agentHub')}
-            </a>
-          )}
-          <label className="btn btn-secondary">
-            <i className="fas fa-file-import" /> {t('actions.import')}
-            <input type="file" accept=".json" className="agents-import-input" onChange={handleImport} />
-          </label>
-          <button className="btn btn-primary" onClick={() => navigate('/app/agents/new')}>
-            <i className="fas fa-plus" /> {t('actions.createAgent')}
-          </button>
-        </div>
-      </div>
+      <PageHeader
+        title={t('title')}
+        supporting={t('subtitle')}
+        actions={
+          <div style={{ display: 'flex', gap: 'var(--spacing-sm)', alignItems: 'center' }}>
+            {agentHubURL && (
+              <a className="btn btn-secondary" href={agentHubURL} target="_blank" rel="noopener noreferrer">
+                <i className="fas fa-store" /> {t('actions.agentHub')}
+              </a>
+            )}
+            <label className="btn btn-secondary">
+              <i className="fas fa-file-import" /> {t('actions.import')}
+              <input type="file" accept=".json" className="agents-import-input" onChange={handleImport} />
+            </label>
+            <button className="btn btn-primary" onClick={() => navigate('/app/agents/new')}>
+              <i className="fas fa-plus" /> {t('actions.createAgent')}
+            </button>
+          </div>
+        }
+      />
 
       {loading ? (
         <div style={{ display: 'flex', justifyContent: 'center', padding: 'var(--spacing-xl)' }}>
diff --git a/core/http/react-ui/src/pages/AudioTransform.jsx b/core/http/react-ui/src/pages/AudioTransform.jsx
index 98526751d..fca38329e 100644
--- a/core/http/react-ui/src/pages/AudioTransform.jsx
+++ b/core/http/react-ui/src/pages/AudioTransform.jsx
@@ -1,6 +1,7 @@
 import { useState, useEffect, useRef } from 'react'
 import { useParams, useOutletContext } from 'react-router-dom'
 import ModelSelector from '../components/ModelSelector'
+import PageHeader from '../components/PageHeader'
 import { CAP_AUDIO_TRANSFORM } from '../utils/capabilities'
 import LoadingSpinner from '../components/LoadingSpinner'
 import ErrorWithTraceLink from '../components/ErrorWithTraceLink'
@@ -166,9 +167,7 @@ export default function AudioTransform() {
   return (
     <div className="media-layout">
       <div className="media-controls">
-        <div className="page-header">
-          <h1 className="page-title"><i className="fas fa-wave-square" /> Audio Transform</h1>
-        </div>
+        <PageHeader title={<><i className="fas fa-wave-square" /> Audio Transform</>} />
 
         <form onSubmit={handleProcess}>
           <div className="form-group">
diff --git a/core/http/react-ui/src/pages/BackendLogs.jsx b/core/http/react-ui/src/pages/BackendLogs.jsx
index 3f5216dbc..1f7c2fed1 100644
--- a/core/http/react-ui/src/pages/BackendLogs.jsx
+++ b/core/http/react-ui/src/pages/BackendLogs.jsx
@@ -4,6 +4,7 @@ import { backendLogsApi, nodesApi } from '../utils/api'
 import { formatTimestamp } from '../utils/format'
 import { apiUrl } from '../utils/basePath'
 import LoadingSpinner from '../components/LoadingSpinner'
+import PageHeader from '../components/PageHeader'
 import { useDistributedMode } from '../hooks/useDistributedMode'
 
 function wsUrl(path) {
@@ -151,15 +152,10 @@ function BackendLogsDetail({ modelId }) {
 
   return (
     <div className="page page--wide">
-      <div className="page-header">
-        <div>
-          <h1 className="page-title" style={{ marginBottom: 0 }}>
-            <i className="fas fa-terminal" style={{ fontSize: '0.8em', marginRight: 'var(--spacing-sm)' }} />
-            {modelId}
-          </h1>
-          <p className="page-subtitle" style={{ marginTop: 'var(--spacing-xs)' }}>Backend process output</p>
-        </div>
-      </div>
+      <PageHeader
+        title={<><i className="fas fa-terminal" style={{ fontSize: '0.8em', marginRight: 'var(--spacing-sm)' }} />{modelId}</>}
+        supporting="Backend process output"
+      />
 
       {/* Toolbar */}
       <div style={{ display: 'flex', gap: 'var(--spacing-sm)', marginBottom: 'var(--spacing-md)', alignItems: 'center', flexWrap: 'wrap' }}>
@@ -361,17 +357,10 @@ function DistributedBackendLogsResolver({ modelId, fromTimestamp }) {
   // Multiple workers host this model — let the operator pick.
   return (
     <div className="page page--wide">
-      <div className="page-header">
-        <div>
-          <h1 className="page-title" style={{ marginBottom: 0 }}>
-            <i className="fas fa-terminal" style={{ fontSize: '0.8em', marginRight: 'var(--spacing-sm)' }} />
-            {modelId}
-          </h1>
-          <p className="page-subtitle" style={{ marginTop: 'var(--spacing-xs)' }}>
-            Hosted on {hits.length} workers — pick one to view its logs.
-          </p>
-        </div>
-      </div>
+      <PageHeader
+        title={<><i className="fas fa-terminal" style={{ fontSize: '0.8em', marginRight: 'var(--spacing-sm)' }} />{modelId}</>}
+        supporting={`Hosted on ${hits.length} workers — pick one to view its logs.`}
+      />
       <div style={{ display: 'flex', flexDirection: 'column', gap: 'var(--spacing-xs)' }}>
         {hits.map(({ node, model }) => (
           <Link
diff --git a/core/http/react-ui/src/pages/Backends.jsx b/core/http/react-ui/src/pages/Backends.jsx
index fe176a16f..b85ba6fe2 100644
--- a/core/http/react-ui/src/pages/Backends.jsx
+++ b/core/http/react-ui/src/pages/Backends.jsx
@@ -7,6 +7,7 @@ import React from 'react'
 import { useOperations } from '../hooks/useOperations'
 import { useDistributedMode } from '../hooks/useDistributedMode'
 import LoadingSpinner from '../components/LoadingSpinner'
+import PageHeader from '../components/PageHeader'
 import { renderMarkdown } from '../utils/markdown'
 import { safeHref } from '../utils/url'
 import ConfirmDialog from '../components/ConfirmDialog'
@@ -348,11 +349,10 @@ export default function Backends() {
       )}
 
       {/* Header */}
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start' }}>
-        <div>
-          <h1 className="page-title">{t('backends.title')}</h1>
-          <p className="page-subtitle">{t('backends.subtitle')}</p>
-        </div>
+      <PageHeader
+        title={t('backends.title')}
+        supporting={t('backends.subtitle')}
+        actions={
         <div style={{ display: 'flex', gap: 'var(--spacing-md)', alignItems: 'center' }}>
           <div style={{ display: 'flex', gap: 'var(--spacing-md)', fontSize: '0.8125rem' }}>
             <div style={{ textAlign: 'center' }}>
@@ -378,7 +378,8 @@ export default function Backends() {
             <i className="fas fa-book" /> Docs
           </a>
         </div>
-      </div>
+        }
+      />
 
       {/* Upgrade Banner */}
       {Object.keys(upgrades).length > 0 && (
diff --git a/core/http/react-ui/src/pages/CollectionDetails.jsx b/core/http/react-ui/src/pages/CollectionDetails.jsx
index c3b5957de..49ddf647a 100644
--- a/core/http/react-ui/src/pages/CollectionDetails.jsx
+++ b/core/http/react-ui/src/pages/CollectionDetails.jsx
@@ -2,6 +2,7 @@ import { useState, useEffect, useCallback } from 'react'
 import { useParams, useOutletContext, useSearchParams } from 'react-router-dom'
 import { agentCollectionsApi } from '../utils/api'
 import ConfirmDialog from '../components/ConfirmDialog'
+import PageHeader from '../components/PageHeader'
 
 export default function CollectionDetails() {
   const { name } = useParams()
@@ -292,10 +293,7 @@ export default function CollectionDetails() {
         }
       `}</style>
 
-      <div className="page-header">
-        <h1 className="page-title">{name}</h1>
-        <p className="page-subtitle">Collection details and management</p>
-      </div>
+      <PageHeader title={name} supporting="Collection details and management" />
 
       <div className="tabs">
         <button className={`tab ${activeTab === 'entries' ? 'tab-active' : ''}`} onClick={() => setActiveTab('entries')}>
diff --git a/core/http/react-ui/src/pages/Collections.jsx b/core/http/react-ui/src/pages/Collections.jsx
index 34b2a6899..94eb005af 100644
--- a/core/http/react-ui/src/pages/Collections.jsx
+++ b/core/http/react-ui/src/pages/Collections.jsx
@@ -5,6 +5,7 @@ import { agentCollectionsApi } from '../utils/api'
 import { useAuth } from '../context/AuthContext'
 import { useUserMap } from '../hooks/useUserMap'
 import UserGroupSection from '../components/UserGroupSection'
+import PageHeader from '../components/PageHeader'
 import ConfirmDialog from '../components/ConfirmDialog'
 
 export default function Collections() {
@@ -119,10 +120,7 @@ export default function Collections() {
         }
       `}</style>
 
-      <div className="page-header">
-        <h1 className="page-title">{t('title')}</h1>
-        <p className="page-subtitle">{t('subtitle')}</p>
-      </div>
+      <PageHeader title={t('title')} supporting={t('subtitle')} />
 
       <div className="collections-create-bar">
         <input
diff --git a/core/http/react-ui/src/pages/FineTune.jsx b/core/http/react-ui/src/pages/FineTune.jsx
index 61a9be8fe..9fe7d65b0 100644
--- a/core/http/react-ui/src/pages/FineTune.jsx
+++ b/core/http/react-ui/src/pages/FineTune.jsx
@@ -1,6 +1,7 @@
 import { useState, useEffect, useRef, useCallback } from 'react'
 import { fineTuneApi } from '../utils/api'
 import LoadingSpinner from '../components/LoadingSpinner'
+import PageHeader from '../components/PageHeader'
 
 const TRAINING_METHODS = ['sft', 'dpo', 'grpo', 'rloo', 'reward', 'kto', 'orpo']
 const TRAINING_TYPES = ['lora', 'loha', 'lokr', 'full']
@@ -1058,21 +1059,21 @@ export default function FineTune() {
 
   return (
     <div className="page page--wide">
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start' }}>
-        <div>
-          <h1 className="page-title">Fine-Tuning <span className="badge badge-warning" style={{ fontSize: '0.45em', verticalAlign: 'middle' }}>Experimental</span></h1>
-          <p className="page-subtitle">Create and manage fine-tuning jobs</p>
-        </div>
-        <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
-          <button className="btn" onClick={handleImportConfig}>
-            <i className="fas fa-upload" style={{ marginRight: 'var(--spacing-xs)' }} /> Import Config
-          </button>
-          <button className="btn btn-primary" onClick={() => setShowForm(!showForm)}>
-            <i className={`fas fa-${showForm ? 'times' : 'plus'}`} style={{ marginRight: 'var(--spacing-xs)' }} />
-            {showForm ? 'Cancel' : 'New Job'}
-          </button>
-        </div>
-      </div>
+      <PageHeader
+        title={<>Fine-Tuning <span className="badge badge-warning" style={{ fontSize: '0.45em', verticalAlign: 'middle' }}>Experimental</span></>}
+        supporting="Create and manage fine-tuning jobs"
+        actions={
+          <div style={{ display: 'flex', gap: 'var(--spacing-sm)' }}>
+            <button className="btn" onClick={handleImportConfig}>
+              <i className="fas fa-upload" style={{ marginRight: 'var(--spacing-xs)' }} /> Import Config
+            </button>
+            <button className="btn btn-primary" onClick={() => setShowForm(!showForm)}>
+              <i className={`fas fa-${showForm ? 'times' : 'plus'}`} style={{ marginRight: 'var(--spacing-xs)' }} />
+              {showForm ? 'Cancel' : 'New Job'}
+            </button>
+          </div>
+        }
+      />
 
       {error && (
         <div className="card" style={{ background: 'var(--color-error-light)', borderColor: 'var(--color-error-border)', color: 'var(--color-error)', marginBottom: 'var(--spacing-md)', padding: 'var(--spacing-md)' }}>
diff --git a/core/http/react-ui/src/pages/ImageGen.jsx b/core/http/react-ui/src/pages/ImageGen.jsx
index 0ac838321..755a7bdc2 100644
--- a/core/http/react-ui/src/pages/ImageGen.jsx
+++ b/core/http/react-ui/src/pages/ImageGen.jsx
@@ -2,6 +2,7 @@ import { useState, useRef } from 'react'
 import { useParams, useOutletContext } from 'react-router-dom'
 import { useTranslation } from 'react-i18next'
 import ModelSelector from '../components/ModelSelector'
+import PageHeader from '../components/PageHeader'
 import { CAP_IMAGE } from '../utils/capabilities'
 import LoadingSpinner from '../components/LoadingSpinner'
 import ErrorWithTraceLink from '../components/ErrorWithTraceLink'
@@ -84,9 +85,7 @@ export default function ImageGen() {
   return (
     <div className="media-layout">
       <div className="media-controls">
-        <div className="page-header">
-          <h1 className="page-title"><i className="fas fa-image" /> {t('image.title')}</h1>
-        </div>
+        <PageHeader title={<><i className="fas fa-image" /> {t('image.title')}</>} />
 
         <form onSubmit={handleGenerate}>
           <div className="form-group">
diff --git a/core/http/react-ui/src/pages/ImportModel.jsx b/core/http/react-ui/src/pages/ImportModel.jsx
index de2db9f60..6ba47ffe8 100644
--- a/core/http/react-ui/src/pages/ImportModel.jsx
+++ b/core/http/react-ui/src/pages/ImportModel.jsx
@@ -3,6 +3,7 @@ import { useNavigate, useOutletContext } from 'react-router-dom'
 import { useTranslation } from 'react-i18next'
 import { modelsApi, backendsApi } from '../utils/api'
 import LoadingSpinner from '../components/LoadingSpinner'
+import PageHeader from '../components/PageHeader'
 import CodeEditor from '../components/CodeEditor'
 import SearchableSelect from '../components/SearchableSelect'
 import AmbiguityAlert from '../components/AmbiguityAlert'
@@ -798,24 +799,24 @@ export default function ImportModel() {
 
   return (
     <div className="page page--narrow">
-      <div className="page-header" style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', flexWrap: 'wrap', gap: 'var(--spacing-sm)' }}>
-        <div>
-          <h1 className="page-title">{t('title')}</h1>
-          <p className="page-subtitle">{subtitle}</p>
-        </div>
-        <div style={{ display: 'flex', gap: 'var(--spacing-sm)', flexWrap: 'wrap', alignItems: 'center' }}>
-          <SimplePowerSwitch value={mode} onChange={requestModeSwitch} disabled={isSubmitting} />
-          {isPowerYaml ? (
-            <button className="btn btn-primary" onClick={handleAdvancedImport} disabled={isSubmitting}>
-              {isSubmitting ? <><LoadingSpinner size="sm" /> {t('actions.saving')}</> : <><i className="fas fa-save" aria-hidden="true" /> {t('actions.create')}</>}
-            </button>
-          ) : (
-            <button className="btn btn-primary" onClick={() => handleSimpleImport()} disabled={isSubmitting || !importUri.trim()}>
-              {isSubmitting ? <><LoadingSpinner size="sm" /> {t('actions.importing')}</> : <><i className="fas fa-upload" aria-hidden="true" /> {t('actions.import')}</>}
-            </button>
-          )}
-        </div>
-      </div>
+      <PageHeader
+        title={t('title')}
+        supporting={subtitle}
+        actions={
+          <div style={{ display: 'flex', gap: 'var(--spacing-sm)', flexWrap: 'wrap', alignItems: 'center' }}>
+            <SimplePowerSwitch value={mode} onChange={requestModeSwitch} disabled={isSubmitting} />
+            {isPowerYaml ? (
+              <button className="btn btn-primary" onClick={handleAdvancedImport} disabled={isSubmitting}>
+                {isSubmitting ? <><LoadingSpinner size="sm" /> {t('actions.saving')}</> : <><i className="fas fa-save" aria-hidden="true" /> {t('actions.create')}</>}
+              </button>
+            ) : (
+              <button className="btn btn-primary" onClick={() => handleSimpleImport()} disabled={isSubmitting || !importUri.trim()}>
+                {isSubmitting ? <><LoadingSpinner size="sm" /> {t('actions.importing')}</> : <><i className="fas fa-upload" aria-hidden="true" /> {t('actions.import')}</>}
+              </button>
+            )}
+          </div>
+        }
+      />
 
       {/* Estimate banner */}
       {!isPowerYaml && estimate && (