diff --git a/packages/agent-graph/src/ports/GraphConfigPort.ts b/packages/agent-graph/src/ports/GraphConfigPort.ts
index 8b5ae57b..c86ba950 100644
--- a/packages/agent-graph/src/ports/GraphConfigPort.ts
+++ b/packages/agent-graph/src/ports/GraphConfigPort.ts
@@ -33,6 +33,7 @@ export interface GraphConfigPort {
 
   // ─── Filters (show/hide node kinds) ────────────────────────────────────
   showActivity?: boolean;
+  showLogs?: boolean;
   showTasks?: boolean;
   showProcesses?: boolean;
   showCompletedTasks?: boolean;
diff --git a/packages/agent-graph/src/ui/GraphControls.tsx b/packages/agent-graph/src/ui/GraphControls.tsx
index dbf36ccf..c06384dc 100644
--- a/packages/agent-graph/src/ui/GraphControls.tsx
+++ b/packages/agent-graph/src/ui/GraphControls.tsx
@@ -9,6 +9,7 @@ import {
   Activity,
   Columns3,
   Expand,
+  FileText,
   Settings2,
   Eye,
   EyeOff,
@@ -29,6 +30,7 @@ import type { GraphLayoutMode } from '../ports/types';
 
 export interface GraphFilterState {
   showActivity: boolean;
+  showLogs: boolean;
   showTasks: boolean;
   showProcesses: boolean;
   showEdges: boolean;
@@ -269,6 +271,13 @@ export function GraphControls({
                   label="Activity"
                   block
                 />
+                <ToolbarToggle
+                  active={filters.showLogs}
+                  onClick={() => toggle('showLogs')}
+                  icon={<FileText size={13} />}
+                  label="Logs"
+                  block
+                />
                 <ToolbarToggle
                   active={filters.showTasks}
                   onClick={() => toggle('showTasks')}
diff --git a/packages/agent-graph/src/ui/GraphView.tsx b/packages/agent-graph/src/ui/GraphView.tsx
index 5486d139..b9e2520c 100644
--- a/packages/agent-graph/src/ui/GraphView.tsx
+++ b/packages/agent-graph/src/ui/GraphView.tsx
@@ -124,6 +124,7 @@ export function GraphView({
   const [interactionLocked, setInteractionLocked] = useState(false);
   const [filters, setFilters] = useState<GraphFilterState>({
     showActivity: config?.showActivity ?? true,
+    showLogs: config?.showLogs ?? config?.showActivity ?? true,
     showTasks: config?.showTasks ?? true,
     showProcesses: config?.showProcesses ?? true,
     showEdges: true,
@@ -138,10 +139,10 @@ export function GraphView({
         ? {
             ...data.layout,
             showActivity: filters.showActivity,
-            showLogs: filters.showActivity,
+            showLogs: filters.showLogs,
           }
         : data.layout,
-    [data.layout, filters.showActivity]
+    [data.layout, filters.showActivity, filters.showLogs]
   );
 
   // Ref mirror of selectedNodeId — read by RAF loop to avoid recreating animate on selection change
diff --git a/src/features/agent-graph/renderer/ui/GraphMemberLogPreviewHud.tsx b/src/features/agent-graph/renderer/ui/GraphMemberLogPreviewHud.tsx
index 9f4e07fe..8171a72f 100644
--- a/src/features/agent-graph/renderer/ui/GraphMemberLogPreviewHud.tsx
+++ b/src/features/agent-graph/renderer/ui/GraphMemberLogPreviewHud.tsx
@@ -416,7 +416,7 @@ export const GraphMemberLogPreviewHud = ({
           key={item.id}
           type="button"
           className={[
-            'block h-14 min-h-14 w-full min-w-0 overflow-hidden rounded-md border px-2.5 py-1.5 text-left text-slate-400 transition-[border-color,background-color,box-shadow] duration-500 hover:border-white/20 hover:bg-[rgba(12,20,40,0.78)]',
+            'block h-16 min-h-16 w-full min-w-0 overflow-hidden rounded-md border px-2.5 py-1.5 text-left text-slate-400 transition-[border-color,background-color,box-shadow] duration-500 hover:border-white/20 hover:bg-[rgba(12,20,40,0.78)]',
             isHighlighted
               ? 'border-sky-300/70 bg-[rgba(14,34,62,0.74)] shadow-[0_0_0_1px_rgba(125,211,252,0.30),0_0_18px_rgba(56,189,248,0.22)]'
               : 'border-white/10 bg-[rgba(8,14,28,0.52)]',
@@ -430,15 +430,15 @@ export const GraphMemberLogPreviewHud = ({
           >
             {itemIcon(item)}
           </span>
-          <span className="align-top text-[11px] font-medium leading-5 text-slate-200">
+          <span className="align-top text-[11px] font-medium leading-4 text-slate-200">
             {displayTitle}
           </span>
           {relativeTime ? (
-            <span className="ml-1 align-top text-[9px] font-normal leading-5 text-slate-500">
+            <span className="ml-1 align-top text-[9px] font-normal leading-4 text-slate-500">
               {relativeTime}
             </span>
           ) : null}
-          <span className="ml-1 break-words align-top text-[10px] leading-5 text-slate-300/85">
+          <span className="ml-1 break-words align-top text-[10px] leading-4 text-slate-300/85">
             {previewText}
           </span>
         </button>
@@ -494,7 +494,7 @@ export const GraphMemberLogPreviewHud = ({
                 ) : (
                   <button
                     type="button"
-                    className="flex h-14 min-h-14 items-center rounded-md border border-dashed border-white/10 bg-[rgba(8,14,28,0.28)] px-3 text-left text-[11px] text-slate-400/60"
+                    className="flex h-16 min-h-16 items-center rounded-md border border-dashed border-white/10 bg-[rgba(8,14,28,0.28)] px-3 text-left text-[11px] text-slate-400/60"
                     onClick={() => openLogs(memberName)}
                   >
                     {resolveEmptyText(preview, loading, error)}
diff --git a/src/features/agent-graph/renderer/ui/TeamGraphOverlay.tsx b/src/features/agent-graph/renderer/ui/TeamGraphOverlay.tsx
index b9f549d7..aebbfd07 100644
--- a/src/features/agent-graph/renderer/ui/TeamGraphOverlay.tsx
+++ b/src/features/agent-graph/renderer/ui/TeamGraphOverlay.tsx
@@ -203,7 +203,7 @@ export const TeamGraphOverlay = ({
                 worldToScreen={extraHudProps.worldToScreen}
                 getViewportSize={getViewportSize}
                 focusNodeIds={focusNodeIds}
-                enabled={filters?.showActivity ?? true}
+                enabled={filters?.showLogs ?? true}
                 onOpenMemberProfile={onOpenMemberProfile}
               />
             </>
diff --git a/src/features/agent-graph/renderer/ui/TeamGraphTab.tsx b/src/features/agent-graph/renderer/ui/TeamGraphTab.tsx
index 43ba87fb..a0ab67f2 100644
--- a/src/features/agent-graph/renderer/ui/TeamGraphTab.tsx
+++ b/src/features/agent-graph/renderer/ui/TeamGraphTab.tsx
@@ -224,7 +224,7 @@ export const TeamGraphTab = ({
                   worldToScreen={extraHudProps.worldToScreen}
                   getViewportSize={getViewportSize}
                   focusNodeIds={focusNodeIds}
-                  enabled={isActive && (filters?.showActivity ?? true)}
+                  enabled={isActive && (filters?.showLogs ?? true)}
                   onOpenMemberProfile={dispatchOpenProfile}
                 />
               </>
diff --git a/src/features/member-log-stream/core/domain/policies/__tests__/memberLogPreviewExtractor.test.ts b/src/features/member-log-stream/core/domain/policies/__tests__/memberLogPreviewExtractor.test.ts
index b59f9a8e..c6095b30 100644
--- a/src/features/member-log-stream/core/domain/policies/__tests__/memberLogPreviewExtractor.test.ts
+++ b/src/features/member-log-stream/core/domain/policies/__tests__/memberLogPreviewExtractor.test.ts
@@ -645,6 +645,62 @@ Reply to this comment using MCP tool task_add_comment.
     expect(result.items[0]?.preview).not.toContain('[{');
   });
 
+  it('formats sourceToolUseID result wrappers with text-block content arrays', () => {
+    const result = extractMemberLogPreviewItems({
+      provider: 'claude_transcript',
+      maxItems: 3,
+      textLimit: 220,
+      messages: [
+        message({
+          uuid: 'list-call',
+          timestamp: '2026-04-01T10:00:00.000Z',
+          content: [
+            {
+              type: 'tool_use',
+              id: 'tool-list',
+              name: 'mcp__agent-teams__task_list',
+              input: { teamName: 'demo' },
+            },
+          ],
+        }),
+        message({
+          uuid: 'source-result',
+          type: 'user',
+          role: 'user',
+          timestamp: '2026-04-01T10:01:00.000Z',
+          content: '',
+          sourceToolUseID: 'tool-list',
+          toolUseResult: {
+            toolUseId: 'tool-list',
+            content: [
+              {
+                type: 'text',
+                text: JSON.stringify([
+                  {
+                    id: '4499fbe5-1fee-42a5-8584-851fbfc4adcd',
+                    displayId: '4499fbe5',
+                    subject: 'Fix contact form route',
+                    status: 'todo',
+                    owner: 'bob',
+                  },
+                ]),
+              },
+            ],
+            isError: false,
+          },
+        }),
+      ],
+    });
+
+    expect(result.items[0]).toMatchObject({
+      kind: 'tool_result',
+      title: 'Task list',
+      preview: '1 task - #4499fbe5: Fix contact form route, status todo, owner bob',
+    });
+    expect(result.items[0]?.preview).not.toContain('toolUseId');
+    expect(result.items[0]?.preview).not.toContain('content');
+  });
+
   it('formats common board and cross-team tool previews compactly', () => {
     const result = extractMemberLogPreviewItems({
       provider: 'opencode_runtime',
diff --git a/src/features/member-log-stream/core/domain/policies/memberLogPreviewExtractor.ts b/src/features/member-log-stream/core/domain/policies/memberLogPreviewExtractor.ts
index dd89cf51..4f560db0 100644
--- a/src/features/member-log-stream/core/domain/policies/memberLogPreviewExtractor.ts
+++ b/src/features/member-log-stream/core/domain/policies/memberLogPreviewExtractor.ts
@@ -240,8 +240,10 @@ function recordFromUnknownWithWrapper(
     return null;
   }
 
-  if (typeof record.content === 'string') {
-    const nested = recordFromUnknownWithWrapper(record.content);
+  const nestedContent =
+    typeof record.content === 'string' ? record.content : textFromTextContentBlocks(record.content);
+  if (nestedContent) {
+    const nested = recordFromUnknownWithWrapper(nestedContent);
     if (nested) {
       return nested;
     }
@@ -984,7 +986,10 @@ function previewUnknownValue(
     if (textBlocks) {
       return previewUnknownValue(textBlocks, limit, priorityKeys, toolContext);
     }
-    const knownCollection = formatTaskCollectionArrayPayload(value, toolContext?.canonicalName);
+    const knownCollection = formatTaskCollectionArrayPayload(
+      value,
+      toolContext?.canonicalName ?? null
+    );
     if (knownCollection) {
       return { ...truncatePreview(knownCollection.text, limit), title: knownCollection.title };
     }
@@ -1000,6 +1005,13 @@ function previewUnknownValue(
     if (known) {
       return { ...truncatePreview(known.text, limit), title: known.title };
     }
+    for (const key of ['content', 'message', 'result'] as const) {
+      if (!(key in record)) continue;
+      const nested = previewUnknownValue(record[key], limit, priorityKeys, toolContext);
+      if (nested.preview.trim().length > 0) {
+        return nested;
+      }
+    }
     const priority = findPriorityValue(record, priorityKeys);
     if (priority) {
       return truncatePreview(priority, limit);
diff --git a/test/renderer/features/agent-graph/GraphControls.test.ts b/test/renderer/features/agent-graph/GraphControls.test.ts
index f519ddc3..68f20d40 100644
--- a/test/renderer/features/agent-graph/GraphControls.test.ts
+++ b/test/renderer/features/agent-graph/GraphControls.test.ts
@@ -37,6 +37,7 @@ describe('GraphControls', () => {
         React.createElement(GraphControls, {
           filters: {
             showActivity: true,
+            showLogs: true,
             showTasks: true,
             showProcesses: true,
             showEdges: true,
@@ -90,6 +91,7 @@ describe('GraphControls', () => {
         React.createElement(GraphControls, {
           filters: {
             showActivity: true,
+            showLogs: true,
             showTasks: true,
             showProcesses: true,
             showEdges: true,
@@ -126,6 +128,7 @@ describe('GraphControls', () => {
         React.createElement(GraphControls, {
           filters: {
             showActivity: true,
+            showLogs: true,
             showTasks: true,
             showProcesses: true,
             showEdges: true,
@@ -161,6 +164,67 @@ describe('GraphControls', () => {
 
     expect(onFiltersChange).toHaveBeenCalledWith({
       showActivity: false,
+      showLogs: true,
+      showTasks: true,
+      showProcesses: true,
+      showEdges: true,
+      paused: false,
+    });
+
+    await act(async () => {
+      root.unmount();
+      await Promise.resolve();
+    });
+  });
+
+  it('toggles log preview visibility from graph settings independently of activity', async () => {
+    const host = document.createElement('div');
+    document.body.appendChild(host);
+    const root = createRoot(host);
+    const onFiltersChange = vi.fn();
+
+    await act(async () => {
+      root.render(
+        React.createElement(GraphControls, {
+          filters: {
+            showActivity: true,
+            showLogs: true,
+            showTasks: true,
+            showProcesses: true,
+            showEdges: true,
+            paused: false,
+          },
+          onFiltersChange,
+          onZoomIn: vi.fn(),
+          onZoomOut: vi.fn(),
+          onZoomToFit: vi.fn(),
+          teamName: 'demo-team',
+        })
+      );
+      await Promise.resolve();
+    });
+
+    const settingsButton = host.querySelector('button[aria-label="Graph settings"]');
+    expect(settingsButton).not.toBeNull();
+
+    await act(async () => {
+      settingsButton?.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+      await Promise.resolve();
+    });
+
+    const logsButton = Array.from(host.querySelectorAll('button')).find((button) =>
+      button.textContent?.includes('Logs')
+    );
+    expect(logsButton).not.toBeUndefined();
+
+    await act(async () => {
+      logsButton?.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+      await Promise.resolve();
+    });
+
+    expect(onFiltersChange).toHaveBeenCalledWith({
+      showActivity: true,
+      showLogs: false,
       showTasks: true,
       showProcesses: true,
       showEdges: true,
@@ -184,6 +248,7 @@ describe('GraphControls', () => {
         React.createElement(GraphControls, {
           filters: {
             showActivity: true,
+            showLogs: true,
             showTasks: true,
             showProcesses: true,
             showEdges: true,
diff --git a/test/renderer/features/agent-graph/GraphMemberLogPreviewHud.test.tsx b/test/renderer/features/agent-graph/GraphMemberLogPreviewHud.test.tsx
index 1a911c8d..fc08f322 100644
--- a/test/renderer/features/agent-graph/GraphMemberLogPreviewHud.test.tsx
+++ b/test/renderer/features/agent-graph/GraphMemberLogPreviewHud.test.tsx
@@ -164,6 +164,8 @@ describe('GraphMemberLogPreviewHud', () => {
     expect(row).not.toBeUndefined();
     expect(row?.querySelector('.float-left')).not.toBeNull();
     expect(row?.querySelector('.line-clamp-3')).toBeNull();
+    expect(row?.className).toContain('h-16');
+    expect(row?.querySelector('span.text-slate-200')?.className).toContain('leading-4');
     expect(row?.textContent).toContain('pnpm test');
 
     const errorRow = Array.from(host.querySelectorAll('button')).find((button) =>
diff --git a/test/renderer/features/agent-graph/GraphView.test.ts b/test/renderer/features/agent-graph/GraphView.test.ts
index b85db7d7..baf6a18b 100644
--- a/test/renderer/features/agent-graph/GraphView.test.ts
+++ b/test/renderer/features/agent-graph/GraphView.test.ts
@@ -513,7 +513,7 @@ describe('GraphView pan interactions', () => {
     expect(onOwnerSlotDrop).not.toHaveBeenCalled();
   });
 
-  it('passes activity filter state to renderHud and updates it through graph controls', async () => {
+  it('passes activity and log filter state to renderHud and updates it through graph controls', async () => {
     const renderHud = vi.fn(() => null);
 
     await act(async () => {
@@ -539,6 +539,7 @@ describe('GraphView pan interactions', () => {
       expect.objectContaining({
         filters: expect.objectContaining({
           showActivity: false,
+          showLogs: false,
         }),
       })
     );
@@ -546,6 +547,7 @@ describe('GraphView pan interactions', () => {
     const controlsProps = hoisted.graphControlsProps as {
       filters: {
         showActivity: boolean;
+        showLogs: boolean;
         showTasks: boolean;
         showProcesses: boolean;
         showEdges: boolean;
@@ -553,6 +555,7 @@ describe('GraphView pan interactions', () => {
       };
       onFiltersChange: (filters: {
         showActivity: boolean;
+        showLogs: boolean;
         showTasks: boolean;
         showProcesses: boolean;
         showEdges: boolean;
@@ -573,6 +576,25 @@ describe('GraphView pan interactions', () => {
       expect.objectContaining({
         filters: expect.objectContaining({
           showActivity: true,
+          showLogs: false,
+        }),
+      })
+    );
+
+    await act(async () => {
+      controlsProps?.onFiltersChange({
+        ...controlsProps!.filters,
+        showActivity: true,
+        showLogs: true,
+      });
+      await Promise.resolve();
+    });
+
+    expect(renderHud).toHaveBeenLastCalledWith(
+      expect.objectContaining({
+        filters: expect.objectContaining({
+          showActivity: true,
+          showLogs: true,
         }),
       })
     );
diff --git a/test/renderer/features/agent-graph/useGraphSimulation.test.ts b/test/renderer/features/agent-graph/useGraphSimulation.test.ts
index d9a16524..55f86fde 100644
--- a/test/renderer/features/agent-graph/useGraphSimulation.test.ts
+++ b/test/renderer/features/agent-graph/useGraphSimulation.test.ts
@@ -408,6 +408,49 @@ describe('stable slot layout planner', () => {
     expect(frame?.kanbanBandRect.left).toBe(frame?.boardBandRect.left);
   });
 
+  it('keeps the reserved log column when logs are shown and activity is hidden', () => {
+    const teamName = 'team-logs-without-activity-slot';
+    const lead = createLead(teamName);
+    const alice = createMember(teamName, 'agent-alice', 'alice');
+    const layout: GraphLayoutPort = {
+      version: 'stable-slots-v1',
+      showActivity: false,
+      showLogs: true,
+      ownerOrder: [alice.id],
+      slotAssignments: {
+        [alice.id]: { ringIndex: 0, sectorIndex: 1 },
+      },
+    };
+
+    const [footprint] = computeOwnerFootprints([lead, alice], layout);
+    const snapshot = buildStableSlotLayoutSnapshot({
+      teamName,
+      nodes: [lead, alice],
+      layout,
+    });
+    const frame = snapshot?.memberSlotFrames[0];
+
+    expect(footprint).toBeDefined();
+    expect(footprint?.activityColumnWidth).toBe(0);
+    expect(footprint?.activityColumnHeight).toBe(0);
+    expect(footprint?.logColumnWidth).toBe(260);
+    expect(footprint?.logColumnHeight).toBe(
+      ACTIVITY_LANE.headerHeight +
+        ACTIVITY_LANE.maxVisibleItems * ACTIVITY_LANE.rowHeight +
+        ACTIVITY_LANE.overflowHeight
+    );
+    expect(snapshot).not.toBeNull();
+    expect(validateStableSlotLayout(snapshot!)).toEqual({ valid: true });
+    expect(frame?.activityColumnRect.width).toBe(0);
+    expect(frame?.activityColumnRect.height).toBe(0);
+    expect(frame?.logColumnRect.width).toBe(260);
+    expect(frame?.logColumnRect.height).toBe(
+      ACTIVITY_LANE.headerHeight +
+        ACTIVITY_LANE.maxVisibleItems * ACTIVITY_LANE.rowHeight +
+        ACTIVITY_LANE.overflowHeight
+    );
+  });
+
   it('keeps diagonal ring-zero sectors closer than the legacy coarse central box radius', () => {
     const teamName = 'team-directional-radius';
     const lead = createLead(teamName);