From e46cc62a0d90a6cd50f6db3a57c6bf749f60d15e Mon Sep 17 00:00:00 2001
From: Miguel <miguel.vera.csa@gmail.com>
Date: Sat, 16 Aug 2025 21:12:19 +0200
Subject: [PATCH] Refactor PlotHistoricalManager: Remove TimeRangeSelector and
 manage time range directly in session creation; update PlotHistoricalSession
 for improved performance with simple plot mode toggle; enhance
 TimePointSelector with time picker styles for better UI consistency.

---
 application_events.json                       | 3501 +++++++++--------
 .../src/components/PlotHistoricalManager.jsx  |  200 +-
 .../src/components/PlotHistoricalSession.jsx  |   63 +-
 frontend/src/components/TimePointSelector.jsx |   28 +
 4 files changed, 2043 insertions(+), 1749 deletions(-)

diff --git a/application_events.json b/application_events.json
index 6ca682d..94f9f03 100644
--- a/application_events.json
+++ b/application_events.json
@@ -1,1549 +1,5 @@
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+      "message": "Performance report: 29 points saved, 0 lost, 0.3% CPU",
+      "details": {
+        "duration": 10.053447008132935,
+        "points_saved": 29,
+        "points_rate": 2.8845827681331464,
+        "variables_saved": 58,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.3,
+        "cpu_max": 0.3,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.09918859087187669,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:09:23.709649",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.3% CPU",
+      "details": {
+        "duration": 10.075260877609253,
+        "points_saved": 30,
+        "points_rate": 2.977590393383309,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
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+        "cpu_average": 0.3,
+        "cpu_max": 0.3,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.10045295556386312,
+        "csv_write_time_avg": 5.0942103068033855e-06
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:09:33.787822",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.07817268371582,
+        "points_saved": 30,
+        "points_rate": 2.976730101923497,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.11741201082865398,
+        "csv_write_time_avg": 5.602836608886719e-06
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:09:43.859536",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.071713924407959,
+        "points_saved": 30,
+        "points_rate": 2.978639010714701,
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+        "udp_points_sent": 0,
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+        "cpu_average": 0.2,
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+        "delay_average": 0.0,
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+        "read_errors": 0,
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+        "udp_errors": 0,
+        "read_time_avg": 0.09971142609914144,
+        "csv_write_time_avg": 2.9921531677246094e-05
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:09:53.920726",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 29 points saved, 0 lost, 0.5% CPU",
+      "details": {
+        "duration": 10.061189889907837,
+        "points_saved": 29,
+        "points_rate": 2.882362853432403,
+        "variables_saved": 58,
+        "udp_points_sent": 0,
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+        "cpu_average": 0.5,
+        "cpu_max": 0.5,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.09876858777013318,
+        "csv_write_time_avg": 1.4247565433896822e-05
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:10:03.965291",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.3% CPU",
+      "details": {
+        "duration": 10.044565200805664,
+        "points_saved": 30,
+        "points_rate": 2.9866897571229596,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.3,
+        "cpu_max": 0.3,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.049120855331420896,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:10:13.994418",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.02912712097168,
+        "points_saved": 30,
+        "points_rate": 2.991287241465679,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.03253419399261474,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:10:24.025284",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.5% CPU",
+      "details": {
+        "duration": 10.030865907669067,
+        "points_saved": 30,
+        "points_rate": 2.990768720880178,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.5,
+        "cpu_max": 0.5,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.03693994681040446,
+        "csv_write_time_avg": 7.6214472452799475e-06
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:10:34.056594",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.031309366226196,
+        "points_saved": 30,
+        "points_rate": 2.9906365066364287,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.03688843250274658,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:10:44.087566",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 31 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.030972242355347,
+        "points_saved": 31,
+        "points_rate": 3.0904282507236776,
+        "variables_saved": 62,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.03543023140199723,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:10:54.126966",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 29 points saved, 0 lost, 0.3% CPU",
+      "details": {
+        "duration": 10.039400577545166,
+        "points_saved": 29,
+        "points_rate": 2.88861867558741,
+        "variables_saved": 58,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.3,
+        "cpu_max": 0.3,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.08817623401510305,
+        "csv_write_time_avg": 1.2110019552296606e-05
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:11:04.180019",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.5% CPU",
+      "details": {
+        "duration": 10.0530526638031,
+        "points_saved": 30,
+        "points_rate": 2.9841681928134762,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.5,
+        "cpu_max": 0.5,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.06117257277170817,
+        "csv_write_time_avg": 1.8358230590820313e-06
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:11:14.210427",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.030407905578613,
+        "points_saved": 30,
+        "points_rate": 2.9909052834546137,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.03783682187398275,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:11:24.240279",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.5% CPU",
+      "details": {
+        "duration": 10.029852628707886,
+        "points_saved": 30,
+        "points_rate": 2.9910708671962616,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.5,
+        "cpu_max": 0.5,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.06331098874409993,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:11:34.300299",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.06001901626587,
+        "points_saved": 30,
+        "points_rate": 2.9821017188430283,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.11557511488596599,
+        "csv_write_time_avg": 4.855791727701823e-06
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:11:44.353903",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 29 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.053604364395142,
+        "points_saved": 29,
+        "points_rate": 2.8845376194336385,
+        "variables_saved": 58,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.1047433409197577,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:11:54.419062",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.3% CPU",
+      "details": {
+        "duration": 10.0641610622406,
+        "points_saved": 30,
+        "points_rate": 2.9808743932523125,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.3,
+        "cpu_max": 0.3,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.10392646789550782,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:12:04.462920",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 30 points saved, 0 lost, 0.8% CPU",
+      "details": {
+        "duration": 10.044856309890747,
+        "points_saved": 30,
+        "points_rate": 2.9866032001334117,
+        "variables_saved": 60,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.8,
+        "cpu_max": 0.8,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.12994245688120523,
+        "csv_write_time_avg": 0.0
+      }
+    },
+    {
+      "timestamp": "2025-08-16T21:12:14.514830",
+      "level": "info",
+      "event_type": "performance_report",
+      "message": "Performance report: 29 points saved, 0 lost, 0.2% CPU",
+      "details": {
+        "duration": 10.051910161972046,
+        "points_saved": 29,
+        "points_rate": 2.885023794752121,
+        "variables_saved": 58,
+        "udp_points_sent": 0,
+        "points_lost": 0,
+        "cpu_average": 0.2,
+        "cpu_max": 0.2,
+        "delay_average": 0.0,
+        "delay_max": 0.0,
+        "read_errors": 0,
+        "csv_errors": 0,
+        "udp_errors": 0,
+        "read_time_avg": 0.09582604210952232,
+        "csv_write_time_avg": 4.039139583193023e-05
+      }
     }
   ],
-  "last_updated": "2025-08-16T20:58:00.198061",
+  "last_updated": "2025-08-16T21:12:14.514830",
   "total_entries": 1000
 }
\ No newline at end of file
diff --git a/frontend/src/components/PlotHistoricalManager.jsx b/frontend/src/components/PlotHistoricalManager.jsx
index 90a290c..930ec10 100644
--- a/frontend/src/components/PlotHistoricalManager.jsx
+++ b/frontend/src/components/PlotHistoricalManager.jsx
@@ -94,145 +94,6 @@ function ConfirmationDialog({ isOpen, onClose, onConfirm, title, message, itemNa
     )
 }
 
-// Time Range Selector Component
-function TimeRangeSelector({ startTime, endTime, onTimeRangeChange, isLoading }) {
-    const [localStartTime, setLocalStartTime] = useState('')
-    const [localEndTime, setLocalEndTime] = useState('')
-    const toast = useToast()
-
-    useEffect(() => {
-        // Initialize with current values with safe date handling
-        if (startTime) {
-            const startDate = new Date(startTime)
-            if (!isNaN(startDate.getTime())) {
-                setLocalStartTime(startDate.toISOString().slice(0, 16))
-            }
-        }
-        if (endTime) {
-            const endDate = new Date(endTime)
-            if (!isNaN(endDate.getTime())) {
-                setLocalEndTime(endDate.toISOString().slice(0, 16))
-            }
-        }
-    }, [startTime, endTime])
-
-    const handleApplyTimeRange = () => {
-        if (localStartTime && localEndTime) {
-            const start = new Date(localStartTime)
-            const end = new Date(localEndTime)
-            
-            // Validate the time range
-            if (start >= end) {
-                toast({
-                    title: "Invalid Time Range",
-                    description: "Start time must be before end time",
-                    status: "error",
-                    duration: 3000,
-                    isClosable: true
-                })
-                return
-            }
-            
-            if (isNaN(start.getTime()) || isNaN(end.getTime())) {
-                toast({
-                    title: "Invalid Date",
-                    description: "Please enter valid dates",
-                    status: "error",
-                    duration: 3000,
-                    isClosable: true
-                })
-                return
-            }
-            
-            onTimeRangeChange(start, end)
-        }
-    }
-
-    const handleQuickRange = (hours) => {
-        const end = new Date()
-        const start = new Date(end.getTime() - hours * 60 * 60 * 1000)
-        
-        // Update local state
-        setLocalStartTime(start.toISOString().slice(0, 16))
-        setLocalEndTime(end.toISOString().slice(0, 16))
-        
-        // Immediately apply the time range
-        onTimeRangeChange(start, end)
-        
-        toast({
-            title: "Time Range Updated",
-            description: `Set to last ${hours} hour${hours !== 1 ? 's' : ''}`,
-            status: "info",
-            duration: 2000,
-            isClosable: true
-        })
-    }
-
-    return (
-        <Card mb={4}>
-            <CardHeader>
-                <Heading size="sm">📅 Time Range Selection</Heading>
-            </CardHeader>
-            <CardBody>
-                <VStack spacing={4} align="stretch">
-                    <HStack spacing={4}>
-                        <FormControl>
-                            <FormLabel fontSize="sm">Start Time</FormLabel>
-                            <Input
-                                type="datetime-local"
-                                value={localStartTime}
-                                onChange={(e) => setLocalStartTime(e.target.value)}
-                                size="sm"
-                            />
-                        </FormControl>
-                        <FormControl>
-                            <FormLabel fontSize="sm">End Time</FormLabel>
-                            <Input
-                                type="datetime-local"
-                                value={localEndTime}
-                                onChange={(e) => setLocalEndTime(e.target.value)}
-                                size="sm"
-                            />
-                        </FormControl>
-                        <Button
-                            colorScheme="blue"
-                            onClick={handleApplyTimeRange}
-                            isLoading={isLoading}
-                            size="sm"
-                            mt={6}
-                        >
-                            📊 Apply
-                        </Button>
-                    </HStack>
-                    
-                    <Divider />
-                    
-                    <Box>
-                        <Text fontSize="sm" mb={2} fontWeight="medium">Quick Ranges:</Text>
-                        <HStack spacing={2} flexWrap="wrap">
-                            <Button size="xs" onClick={() => handleQuickRange(1)} isLoading={isLoading}>
-                                Last Hour
-                            </Button>
-                            <Button size="xs" onClick={() => handleQuickRange(6)} isLoading={isLoading}>
-                                Last 6 Hours
-                            </Button>
-                            <Button size="xs" onClick={() => handleQuickRange(24)} isLoading={isLoading}>
-                                Last 24 Hours
-                            </Button>
-                            <Button size="xs" onClick={() => handleQuickRange(72)} isLoading={isLoading}>
-                                Last 3 Days
-                            </Button>
-                            <Button size="xs" onClick={() => handleQuickRange(168)} isLoading={isLoading}>
-                                Last Week
-                            </Button>
-                        </HStack>
-                    </Box>
-                </VStack>
-            </CardBody>
-        </Card>
-    )
-}
-
 // Collapsible Plot Items Form - Each item in the array is individually collapsible
 function CollapsiblePlotItemsForm({ data, schema, uiSchema, onSave, title, icon, getItemLabel, isExpanded, onToggleExpansion }) {
     const [formData, setFormData] = useState(data)
@@ -431,14 +292,6 @@ export default function PlotHistoricalManager() {
     const [booleanVariables, setBooleanVariables] = useState([])
     
     const [selectedPlotId, setSelectedPlotId] = useState('')
-    const [customTimeRange, setCustomTimeRange] = useState(() => {
-        const now = new Date()
-        const twentyFourHoursAgo = new Date(now.getTime() - 24 * 60 * 60 * 1000)
-        return {
-            start: twentyFourHoursAgo,
-            end: now
-        }
-    })
     
     const [isLoading, setIsLoading] = useState(false)
     const [isLoadingHistoricalData, setIsLoadingHistoricalData] = useState(false)
@@ -641,16 +494,22 @@ export default function PlotHistoricalManager() {
             // Create historical session
             const sessionId = `historical_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`
             
+            // Default time range - individual charts will manage their own time ranges
+            const defaultTimeRange = {
+                start: new Date(Date.now() - 24 * 60 * 60 * 1000), // 24 hours ago
+                end: new Date()
+            }
+            
             const newSession = {
                 id: sessionId,
                 plotId: selectedPlotId,
                 name: plotDef.name,
                 variables: variableNames,
-                timeRange: { ...customTimeRange },
+                timeRange: defaultTimeRange,
                 config: {
                     ...plotDef,
                     variables: variableNames,
-                    time_window: Math.floor((customTimeRange.end - customTimeRange.start) / 1000),
+                    time_window: 86400, // 24 hours in seconds
                     y_min: plotDef.y_min,
                     y_max: plotDef.y_max,
                     trigger_variable: plotDef.trigger_variable,
@@ -696,11 +555,6 @@ export default function PlotHistoricalManager() {
         })
     }
 
-    const handleTimeRangeChange = (start, end) => {
-        console.log('📅 Time range changed:', { start, end })
-        setCustomTimeRange({ start, end })
-    }
-
     const bgColor = useColorModeValue('gray.50', 'gray.900')
     const cardBgColor = useColorModeValue('white', 'gray.800')
 
@@ -758,14 +612,6 @@ export default function PlotHistoricalManager() {
                     </CardHeader>
                 </Card>
 
-                {/* Time Range Selector */}
-                <TimeRangeSelector
-                    startTime={customTimeRange.start}
-                    endTime={customTimeRange.end}
-                    onTimeRangeChange={handleTimeRangeChange}
-                    isLoading={isLoadingHistoricalData}
-                />
-
                 {/* Plot Creation */}
                 <Card bg={cardBgColor}>
                     <CardHeader>
@@ -852,36 +698,6 @@ export default function PlotHistoricalManager() {
                     </Collapse>
                 </Card>
 
-                {/* Plot Definitions Configuration */}
-                {plotDefinitionsSchema && (
-                    <CollapsiblePlotItemsForm
-                        data={plotDefinitions.plots || []}
-                        schema={plotDefinitionsSchema}
-                        uiSchema={plotDefinitionsUiSchema}
-                        onSave={(newPlots) => savePlotDefinitions({ plots: newPlots })}
-                        title="Plot Definitions"
-                        icon="📊"
-                        getItemLabel={(item) => item.name || 'Unnamed Plot'}
-                        isExpanded={isDefinitionsExpanded}
-                        onToggleExpansion={() => setIsDefinitionsExpanded(!isDefinitionsExpanded)}
-                    />
-                )}
-
-                {/* Plot Variables Configuration */}
-                {plotVariablesSchema && (
-                    <CollapsiblePlotItemsForm
-                        data={plotVariables.variables || []}
-                        schema={plotVariablesSchema}
-                        uiSchema={plotVariablesUiSchema}
-                        onSave={(newVariables) => savePlotVariables({ variables: newVariables })}
-                        title="Plot Variables"
-                        icon="🔢"
-                        getItemLabel={(item) => `${item.plot_id}: ${item.variable_name}` || 'Unnamed Variable'}
-                        isExpanded={isVariablesExpanded}
-                        onToggleExpansion={() => setIsVariablesExpanded(!isVariablesExpanded)}
-                    />
-                )}
-
                 {isLoading && (
                     <Flex justify="center" py={8}>
                         <Spinner size="lg" color="blue.500" />
diff --git a/frontend/src/components/PlotHistoricalSession.jsx b/frontend/src/components/PlotHistoricalSession.jsx
index c9523e6..1a7d4fe 100644
--- a/frontend/src/components/PlotHistoricalSession.jsx
+++ b/frontend/src/components/PlotHistoricalSession.jsx
@@ -46,7 +46,7 @@ import {
     Progress,
     Tooltip
 } from '@chakra-ui/react'
-import { SettingsIcon, RepeatIcon, ViewIcon, DeleteIcon, TimeIcon, CalendarIcon, ViewOffIcon } from '@chakra-ui/icons'
+import { SettingsIcon, RepeatIcon, ViewIcon, DeleteIcon, TimeIcon, CalendarIcon, ViewOffIcon, StarIcon, ExternalLinkIcon, ChevronUpIcon, ChevronDownIcon } from '@chakra-ui/icons'
 import ChartjsHistoricalPlot from './ChartjsHistoricalPlot.jsx'
 import TimePointSelector from './TimePointSelector.jsx'
 import DataAvailabilityBar from './DataAvailabilityBar.jsx'
@@ -171,8 +171,8 @@ export default function PlotHistoricalSession({
     const { isOpen: isConfigModalOpen, onOpen: onConfigModalOpen, onClose: onConfigModalClose } = useDisclosure()
     const { isOpen: isFullscreen, onOpen: openFullscreen, onClose: closeFullscreen } = useDisclosure()
     
-    // NEW: Simple plot mode toggle
-    const [isSimplePlot, setIsSimplePlot] = useState(false)
+    // NEW: Simple plot mode toggle (default to true for better performance)
+    const [isSimplePlot, setIsSimplePlot] = useState(true)
 
     // Keep track of the last loaded data range for optimization
     const [loadedDataRange, setLoadedDataRange] = useState(null)
@@ -438,6 +438,17 @@ export default function PlotHistoricalSession({
     const infoBgColor = useColorModeValue('gray.50', 'gray.700')
     const subtleTextColor = useColorModeValue('gray.500', 'gray.400')
     const smallTextColor = useColorModeValue('gray.400', 'gray.500')
+    
+    // Additional color mode values for conditional elements
+    const whiteAlphaBg = useColorModeValue('whiteAlpha.800', 'blackAlpha.800')
+    const inputBg = useColorModeValue('white', 'gray.700')
+    const inputHoverBg = useColorModeValue('gray.50', 'gray.600')
+    const editFieldColor = useColorModeValue('gray.900', 'gray.100')
+    const editFieldBg = useColorModeValue('gray.50', 'gray.600')
+    const calendarFilter = useColorModeValue('none', 'invert(1)')
+    const modalBg = useColorModeValue('white', 'gray.700')
+    const modalTextColor = useColorModeValue('gray.600', 'gray.300')
+    const highlightBg = useColorModeValue('blue.50', 'blue.900')
 
     // Format time range for display
     const formatTimeRange = (timeRange) => {
@@ -552,20 +563,20 @@ export default function PlotHistoricalSession({
                                 colorScheme={showDataPreview ? 'blue' : 'gray'}
                             />
                         </Tooltip>
-                        <Tooltip label="Simple Plot Mode">
+                        <Tooltip label={isSimplePlot ? "Standard Plot Mode" : "Simple Plot Mode"}>
                             <IconButton
-                                icon={<ViewOffIcon />}
+                                icon={isSimplePlot ? <StarIcon /> : <ViewOffIcon />}
                                 size="sm"
                                 variant="ghost"
                                 onClick={() => setIsSimplePlot(!isSimplePlot)}
-                                colorScheme={isSimplePlot ? 'blue' : 'gray'}
+                                colorScheme={isSimplePlot ? 'orange' : 'gray'}
                             />
                         </Tooltip>
                         <Tooltip label="Fullscreen">
                             <Button
                                 size="sm"
                                 variant="ghost"
-                                leftIcon={<ViewIcon />}
+                                leftIcon={<ExternalLinkIcon />}
                                 onClick={openFullscreen}
                             >
                                 Fullscreen
@@ -582,7 +593,7 @@ export default function PlotHistoricalSession({
                         </Tooltip>
                         <Tooltip label={isExpanded ? "Collapse" : "Expand"}>
                             <IconButton
-                                icon={isExpanded ? <ViewIcon /> : <ViewIcon />}
+                                icon={isExpanded ? <ChevronUpIcon /> : <ChevronDownIcon />}
                                 size="sm"
                                 variant="ghost"
                                 onClick={() => setIsExpanded(!isExpanded)}
@@ -687,7 +698,7 @@ export default function PlotHistoricalSession({
                                 display="flex" 
                                 alignItems="center" 
                                 justifyContent="center"
-                                bg={useColorModeValue('whiteAlpha.800', 'blackAlpha.800')}
+                                bg={whiteAlphaBg}
                                 backdropFilter="blur(2px)"
                             >
                                 <VStack>
@@ -728,6 +739,34 @@ export default function PlotHistoricalSession({
                                             }
                                             onChange={(e) => setCentralTime(new Date(e.target.value))}
                                             size="sm"
+                                            bg={inputBg}
+                                            _hover={{ bg: inputHoverBg }}
+                                            sx={{
+                                                '&::-webkit-datetime-edit': {
+                                                    color: editFieldColor
+                                                },
+                                                '&::-webkit-datetime-edit-fields-wrapper': {
+                                                    background: 'transparent'
+                                                },
+                                                '&::-webkit-datetime-edit-hour-field': {
+                                                    background: editFieldBg,
+                                                    borderRadius: '2px',
+                                                    padding: '1px 2px'
+                                                },
+                                                '&::-webkit-datetime-edit-minute-field': {
+                                                    background: editFieldBg,
+                                                    borderRadius: '2px',
+                                                    padding: '1px 2px'
+                                                },
+                                                '&::-webkit-datetime-edit-second-field': {
+                                                    background: editFieldBg,
+                                                    borderRadius: '2px',
+                                                    padding: '1px 2px'
+                                                },
+                                                '&::-webkit-calendar-picker-indicator': {
+                                                    filter: calendarFilter
+                                                }
+                                            }}
                                         />
                                     </FormControl>
                                     <FormControl>
@@ -830,12 +869,12 @@ export default function PlotHistoricalSession({
             {/* Fullscreen Modal */}
             <Modal isOpen={isFullscreen} onClose={closeFullscreen} size="full">
                 <ModalOverlay bg="blackAlpha.800" />
-                <ModalContent bg={useColorModeValue('white', 'gray.700')} m={0} borderRadius={0} h="100vh">
+                <ModalContent bg={modalBg} m={0} borderRadius={0} h="100vh">
                     <ModalHeader>
                         <HStack>
                             <Text>📈 {session.name} - Fullscreen Mode</Text>
                             <Spacer />
-                            <Text fontSize="sm" color={useColorModeValue('gray.600', 'gray.300')}>
+                            <Text fontSize="sm" color={modalTextColor}>
                                 Zoom: Drag to select area | Pan: Shift + Drag | Double-click to reset
                             </Text>
                         </HStack>
@@ -904,7 +943,7 @@ export default function PlotHistoricalSession({
                                 </Button>
                                 
                                 {/* Time range info */}
-                                <Box px={3} py={1} bg={useColorModeValue('blue.50', 'blue.900')} borderRadius="md" fontSize="xs">
+                                <Box px={3} py={1} bg={highlightBg} borderRadius="md" fontSize="xs">
                                     <HStack spacing={4}>
                                         <Text><strong>Range:</strong> {timeRangeSeconds}s</Text>
                                         <Text><strong>From:</strong> {formatCentralTimeInfo().start}</Text>
diff --git a/frontend/src/components/TimePointSelector.jsx b/frontend/src/components/TimePointSelector.jsx
index cd9544e..d0bc679 100644
--- a/frontend/src/components/TimePointSelector.jsx
+++ b/frontend/src/components/TimePointSelector.jsx
@@ -203,6 +203,34 @@ export default function TimePointSelector({
               '& .react-datepicker__day--selected': {
                 backgroundColor: 'blue.500',
                 color: 'white'
+              },
+              // Time picker specific styles
+              '& .react-datepicker__time-container': {
+                backgroundColor: useColorModeValue('white', 'gray.800'),
+                borderLeft: '1px solid',
+                borderColor: borderColor
+              },
+              '& .react-datepicker__time-box': {
+                backgroundColor: useColorModeValue('white', 'gray.800')
+              },
+              '& .react-datepicker__time-list': {
+                backgroundColor: useColorModeValue('white', 'gray.800'),
+                '& .react-datepicker__time-list-item': {
+                  color: textColor,
+                  backgroundColor: useColorModeValue('white', 'gray.800'),
+                  '&:hover': {
+                    backgroundColor: useColorModeValue('gray.100', 'gray.700')
+                  },
+                  '&--selected': {
+                    backgroundColor: 'blue.500',
+                    color: 'white',
+                    fontWeight: 'bold'
+                  }
+                }
+              },
+              '& .react-datepicker__time-name': {
+                color: textColor,
+                backgroundColor: useColorModeValue('gray.50', 'gray.700')
               }
             }}
           >