[eric] history: move chat history from the dock to the top island and make it global (was filtered to the current dashboard)

frontend/src/app/pages/Dashboard/DashboardToolbar.tsx

@@ -259,9 +259,8 @@ const DashboardToolbar = React.forwardRef<HTMLDivElement, Props>(
         q: historyQuery,
         limit: HISTORY_PAGE_SIZE,
         offset: historySearch.results.length,
-        dashboardId,
       }));
-    }, [dispatch, historyQuery, historySearch.loading, historySearch.hasMore, historySearch.results.length, dashboardId]);
+    }, [dispatch, historyQuery, historySearch.loading, historySearch.hasMore, historySearch.results.length]);
 
     const isExpanded = inputOpen || viewPickerOpen || historyOpen;
 
@@ -376,13 +375,14 @@ const DashboardToolbar = React.forwardRef<HTMLDivElement, Props>(
       };
     }, [handleOpenViewPicker, handleOpenHistory, onAddBrowser]);
 
+    // No dashboardId: chat history is global, so a chat you started on another dashboard is still findable here.
     useEffect(() => {
       if (!historyOpen) return;
       const timer = setTimeout(() => {
-        dispatch(searchHistory({ q: historyQuery, limit: HISTORY_PAGE_SIZE, offset: 0, dashboardId }));
+        dispatch(searchHistory({ q: historyQuery, limit: HISTORY_PAGE_SIZE, offset: 0 }));
       }, 300);
       return () => clearTimeout(timer);
-    }, [historyQuery, historyOpen, dispatch, dashboardId]);
+    }, [historyQuery, historyOpen, dispatch]);
 
     useEffect(() => {
       if (historyOpen && popoverMode === 'runs') {

frontend/src/app/pages/Dashboard/canvas/DashboardHeader.tsx

@@ -5,6 +5,8 @@ import SmartToyOutlinedIcon from '@mui/icons-material/SmartToyOutlined';
 import GridViewRoundedIcon from '@mui/icons-material/GridViewRounded';
 import LanguageIcon from '@mui/icons-material/Language';
 import KeyboardArrowDownIcon from '@mui/icons-material/KeyboardArrowDown';
+import HistoryIcon from '@mui/icons-material/History';
+import Tooltip from '@mui/material/Tooltip';
 import { useClaudeTokens } from '@/shared/styles/ThemeContext';
 import { useAppDispatch } from '@/shared/hooks';
 import DashboardGlyph from './DashboardGlyph';
@@ -164,6 +166,26 @@ const DashboardHeader: React.FC<DashboardHeaderProps> = ({
             }}
           />
         )}
+        {/* Chat history lives up here on the island, not in the dock, and it spans every dashboard. */}
+        <Tooltip title="Chat history" placement="bottom">
+          <Box
+            onClick={(e: React.MouseEvent) => {
+              e.stopPropagation();
+              window.dispatchEvent(new CustomEvent('openswarm:open-history'));
+            }}
+            sx={{
+              ml: 0.25,
+              display: 'flex',
+              alignItems: 'center',
+              borderRadius: '5px',
+              p: '2px',
+              cursor: 'pointer',
+              '&:hover': { bgcolor: `${c.bg.surface}99` },
+            }}
+          >
+            <HistoryIcon sx={{ fontSize: 16, color: c.text.tertiary }} />
+          </Box>
+        </Tooltip>
         {dashboardId && (
           <Box sx={{ ml: 0.25, display: 'flex' }}>
             <ShareButton

frontend/src/app/pages/Dashboard/desktop/DesktopDock.tsx

@@ -5,7 +5,6 @@ import Typography from '@mui/material/Typography';
 import LanguageIcon from '@mui/icons-material/Language';
 import EventRepeatIcon from '@mui/icons-material/EventRepeat';
 import StickyNote2OutlinedIcon from '@mui/icons-material/StickyNote2Outlined';
-import HistoryIcon from '@mui/icons-material/History';
 import { openWorkflowsApp } from '@/shared/state/dashboardLayoutSlice';
 import SettingsIcon from '@mui/icons-material/Settings';
 import AppsRoundedIcon from '@mui/icons-material/AppsRounded';
@@ -202,12 +201,11 @@ function DesktopDock({
       {entries.length > 0 && (
         <Box sx={{ width: TILE - 8, height: '1px', background: 'rgba(255,255,255,0.14)' }} />
       )}
-      {/* The og toolbar's actions, dock-resident: browser, workflow, note, history, then settings + apps below their own divider. No New-chat tile; the spawn pill at the bottom is always there. */}
+      {/* The og toolbar's actions, dock-resident: browser, workflow, note, then settings + apps below their own divider. New-chat lives in the spawn pill, history on the top island. */}
       {([
         { label: 'New browser', icon: <LanguageIcon sx={{ fontSize: 17, color: '#e8e8ee' }} />, act: onAddBrowser },
         { label: 'Workflows', icon: <EventRepeatIcon sx={{ fontSize: 16, color: '#e8e8ee' }} />, act: () => dispatch(openWorkflowsApp()) },
         { label: 'New note', icon: <StickyNote2OutlinedIcon sx={{ fontSize: 16, color: '#e8e8ee' }} />, act: onAddNote },
-        { label: 'History', icon: <HistoryIcon sx={{ fontSize: 17, color: '#e8e8ee' }} />, act: () => window.dispatchEvent(new CustomEvent('openswarm:open-history')) },
         { label: 'Settings', icon: <SettingsIcon sx={{ fontSize: 18, color: '#e8e8ee' }} />, act: () => dispatch(openSettingsModal(undefined)), divider: true },
         { label: 'Applications', icon: <AppsRoundedIcon sx={{ fontSize: 18, color: '#e8e8ee' }} />, act: onApplications, bg: 'linear-gradient(135deg, #3d3d46, #232329)' },
       ] as { label: string; icon: React.ReactNode; act: () => void; divider?: boolean; bg?: string }[]).map((a) => (