diff --git a/frontend/src/components/editor-ai/EditorAIPanel.tsx b/frontend/src/components/editor-ai/EditorAIPanel.tsx
index feda2b1b..10285ff9 100644
--- a/frontend/src/components/editor-ai/EditorAIPanel.tsx
+++ b/frontend/src/components/editor-ai/EditorAIPanel.tsx
@@ -6,8 +6,6 @@ import { ChatTab } from './ChatTab'
 import { SuggestionsTab } from './SuggestionsTab'
 import type { EditorAIChatMessage, AISuggestion } from '@/types'
 
-const PANEL_WIDTH = 380
-
 interface EditorAIPanelProps {
   isOpen: boolean
   onClose: () => void
@@ -25,8 +23,6 @@ interface EditorAIPanelProps {
 
 type Tab = 'chat' | 'suggestions'
 
-export { PANEL_WIDTH }
-
 export function EditorAIPanel({
   isOpen,
   onClose,
@@ -49,10 +45,8 @@ export function EditorAIPanel({
 
   return (
     <div
-      className="fixed right-0 bottom-0 z-40 flex flex-col border-l"
+      className="flex h-full w-[380px] shrink-0 flex-col border-l"
       style={{
-        top: '56px',
-        width: `${PANEL_WIDTH}px`,
         background: 'rgba(16, 17, 20, 0.95)',
         backdropFilter: 'var(--glass-blur)',
         WebkitBackdropFilter: 'var(--glass-blur)',
diff --git a/frontend/src/pages/ProceduralEditorPage.tsx b/frontend/src/pages/ProceduralEditorPage.tsx
index fe822331..7a87c3cb 100644
--- a/frontend/src/pages/ProceduralEditorPage.tsx
+++ b/frontend/src/pages/ProceduralEditorPage.tsx
@@ -10,7 +10,7 @@ import { getScheduleSummary } from '@/components/procedural-editor/scheduleUtils
 import { StepList } from '@/components/procedural-editor/StepList'
 import { TagInput } from '@/components/common/TagInput'
 import { Spinner } from '@/components/common/Spinner'
-import { EditorAIPanel, PANEL_WIDTH } from '@/components/editor-ai/EditorAIPanel'
+import { EditorAIPanel } from '@/components/editor-ai/EditorAIPanel'
 import { ContextMenu } from '@/components/common/ContextMenu'
 import { useEditorAI } from '@/hooks/useEditorAI'
 import { cn } from '@/lib/utils'
@@ -180,7 +180,9 @@ export function ProceduralEditorPage() {
   }
 
   return (
-    <div className="flex h-full flex-col overflow-hidden transition-[padding] duration-200" style={{ paddingRight: editorAI.isOpen ? `${PANEL_WIDTH}px` : 0 }}>
+    <div className="flex h-full overflow-hidden">
+      {/* Main content column */}
+      <div className="flex min-w-0 flex-1 flex-col overflow-hidden">
       {/* Toolbar — sticky */}
       <div className="flex shrink-0 items-center justify-between border-b border-border bg-card px-4 py-2">
         <div className="flex items-center gap-3">
@@ -320,21 +322,6 @@ export function ProceduralEditorPage() {
         <StepList onStepContextMenu={editorAI.openContextMenu} />
       </div>
 
-      <EditorAIPanel
-        isOpen={editorAI.isOpen}
-        onClose={editorAI.closePanel}
-        focalNode={null}
-        flowName={name}
-        flowType={isMaintenance ? 'maintenance' : 'procedural'}
-        nodeCount={steps.length}
-        messages={editorAI.messages}
-        input={editorAI.input}
-        onInputChange={editorAI.setInput}
-        onSend={editorAI.sendMessage}
-        isLoading={editorAI.isLoading}
-        suggestions={editorAI.suggestions}
-      />
-
       {editorAI.contextMenu && (
         <ContextMenu
           position={editorAI.contextMenu.position}
@@ -363,6 +350,22 @@ export function ProceduralEditorPage() {
           onClose={editorAI.closeContextMenu}
         />
       )}
+      </div>{/* end main content column */}
+
+      <EditorAIPanel
+        isOpen={editorAI.isOpen}
+        onClose={editorAI.closePanel}
+        focalNode={null}
+        flowName={name}
+        flowType={isMaintenance ? 'maintenance' : 'procedural'}
+        nodeCount={steps.length}
+        messages={editorAI.messages}
+        input={editorAI.input}
+        onInputChange={editorAI.setInput}
+        onSend={editorAI.sendMessage}
+        isLoading={editorAI.isLoading}
+        suggestions={editorAI.suggestions}
+      />
     </div>
   )
 }
diff --git a/frontend/src/pages/TreeEditorPage.tsx b/frontend/src/pages/TreeEditorPage.tsx
index ac26fc0c..7d35c150 100644
--- a/frontend/src/pages/TreeEditorPage.tsx
+++ b/frontend/src/pages/TreeEditorPage.tsx
@@ -17,7 +17,7 @@ import { cn, safeGetItem } from '@/lib/utils'
 import { toast } from '@/lib/toast'
 import { FlowAnalyticsPanel } from '@/components/analytics/FlowAnalyticsPanel'
 import { ExportFlowModal } from '@/components/library/ExportFlowModal'
-import { EditorAIPanel, PANEL_WIDTH } from '@/components/editor-ai/EditorAIPanel'
+import { EditorAIPanel } from '@/components/editor-ai/EditorAIPanel'
 import { ContextMenu } from '@/components/common/ContextMenu'
 import { useEditorAI } from '@/hooks/useEditorAI'
 import { findNodeInTree } from '@/store/treeEditorStore'
@@ -522,7 +522,9 @@ export function TreeEditorPage() {
   }
 
   return (
-    <div className="flex h-full flex-col overflow-hidden transition-[padding] duration-200" style={{ paddingRight: editorAI.isOpen ? `${PANEL_WIDTH}px` : 0 }}>
+    <div className="flex h-full overflow-hidden">
+      {/* Main content column */}
+      <div className="flex min-w-0 flex-1 flex-col overflow-hidden">
 
       {/* Draft Restore Prompt */}
       {showDraftPrompt && (
@@ -876,23 +878,6 @@ export function TreeEditorPage() {
         />
       )}
 
-      <EditorAIPanel
-        isOpen={editorAI.isOpen}
-        onClose={handleAIPanelClose}
-        focalNode={editorAI.focalNodeId && treeStructure
-          ? findNodeInTree(editorAI.focalNodeId, treeStructure)
-          : null}
-        flowName={name}
-        flowType="troubleshooting"
-        nodeCount={treeStructure ? getAllNodeIds().length : 0}
-        messages={editorAI.messages}
-        input={editorAI.input}
-        onInputChange={editorAI.setInput}
-        onSend={editorAI.sendMessage}
-        isLoading={editorAI.isLoading}
-        suggestions={editorAI.suggestions}
-      />
-
       {/* AI Context Menu */}
       {editorAI.contextMenu && (
         <ContextMenu
@@ -946,6 +931,24 @@ export function TreeEditorPage() {
           onClose={editorAI.closeContextMenu}
         />
       )}
+      </div>{/* end main content column */}
+
+      <EditorAIPanel
+        isOpen={editorAI.isOpen}
+        onClose={handleAIPanelClose}
+        focalNode={editorAI.focalNodeId && treeStructure
+          ? findNodeInTree(editorAI.focalNodeId, treeStructure)
+          : null}
+        flowName={name}
+        flowType="troubleshooting"
+        nodeCount={treeStructure ? getAllNodeIds().length : 0}
+        messages={editorAI.messages}
+        input={editorAI.input}
+        onInputChange={editorAI.setInput}
+        onSend={editorAI.sendMessage}
+        isLoading={editorAI.isLoading}
+        suggestions={editorAI.suggestions}
+      />
     </div>
   )
 }