feat: update version to 1.3.1, enhance GanttChart and MetricsPanel, and add ThreadMetricsChart

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pss",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Process Scheduler Simulator — an interactive educational tool that runs entirely in the browser",
   "main": "index.js",
   "scripts": {

src/components/GanttChart/GanttChart.tsx

@@ -47,7 +47,7 @@ const GanttChart = () => {
           <div className="flex sticky top-0 z-10 bg-slate-950 border-b border-slate-800">
             <div
               className="sticky left-0 z-20 bg-slate-950 border-r border-slate-700 shrink-0"
-              style={{ width: 48, height: 16 }}
+              style={{ width: 60, height: 16 }}
             />
             {tickNumbers.map((t) => (
               <div
@@ -73,7 +73,7 @@ const GanttChart = () => {
                   >
                     <div
                       className="sticky left-0 z-20 bg-slate-900 border-r border-slate-700 px-2 flex items-center shrink-0"
-                      style={{ width: 48, height: CELL_H }}
+                      style={{ width: 60, height: CELL_H }}
                     >
                       <span
                         className="text-[10px] font-bold truncate"
@@ -117,7 +117,7 @@ const GanttChart = () => {
             {currentTickIndex >= 0 && (
               <div
                 className="gantt-cursor absolute top-0 bottom-0 w-px bg-white/20 pointer-events-none"
-                style={{ left: 48 + currentTickIndex * CELL_W + CELL_W / 2 }}
+                style={{ left: 60 + currentTickIndex * CELL_W + CELL_W / 2 }}
               />
             )}
           </div>

src/components/GanttChart/GanttThreadRow.tsx

@@ -39,7 +39,7 @@ const GanttThreadRow = React.memo(function GanttThreadRow({
       {/* Rótulo da thread (sticky) */}
       <div
         className="sticky left-0 z-20 bg-slate-900/90 border-r border-slate-700/50 px-2 flex items-center shrink-0 gap-1"
-        style={{ width: 48, height: THREAD_CELL_H }}
+        style={{ width: 60, height: THREAD_CELL_H }}
       >
         <span
           className="w-1.5 h-1.5 rounded-full shrink-0"

src/components/Layout/MainArea.tsx

@@ -4,7 +4,7 @@ import MetricsPanel from '../MetricsPanel/MetricsPanel';
 
 const MainArea = () => {
   return (
-    <main className="flex-1 flex flex-col h-full bg-slate-900 overflow-hidden relative">
+    <main className="flex-1 flex flex-col bg-slate-900 overflow-y-auto relative">
       <ControlBar />
       <GanttChart />
       <MetricsPanel />

src/components/MetricsPanel/MetricsPanel.tsx

@@ -8,8 +8,9 @@ import MetricsTable from './MetricsTable';
 import GlobalMetrics from './GlobalMetrics';
 import MetricsChart from './MetricsChart';
 import ThreadMetricsTable from './ThreadMetricsTable';
+import ThreadMetricsChart from './ThreadMetricsChart';
 
-type Tab = 'table' | 'global' | 'charts' | 'threads';
+type Tab = 'table' | 'global' | 'charts' | 'threads' | 'thread-charts';
 
 const MetricsPanel = () => {
   const [activeTab, setActiveTab] = useState<Tab>('table');
@@ -53,14 +54,15 @@ const MetricsPanel = () => {
   const canExportCSV = status === 'finished' && processMetrics.length > 0;
 
   const TAB_CONFIG: { id: Tab; label: string; icon: React.ReactNode; show: boolean }[] = [
-    { id: 'table',   label: 'Per Process', icon: <Table    size={13} />, show: true },
+    { id: 'table',         label: 'Per Process',   icon: <Table     size={13} />, show: true },
-    { id: 'global',  label: 'Global',      icon: <Globe    size={13} />, show: true },
+    { id: 'global',        label: 'Global',        icon: <Globe     size={13} />, show: true },
-    { id: 'charts',  label: 'Charts',      icon: <BarChart2 size={13} />, show: true },
+    { id: 'charts',        label: 'Process Charts',        icon: <BarChart2 size={13} />, show: true },
-    { id: 'threads', label: 'Threads',     icon: <Layers   size={13} />, show: hasThreads },
+    { id: 'threads',       label: 'Threads',       icon: <Layers    size={13} />, show: hasThreads },
+    { id: 'thread-charts', label: 'Thread Charts', icon: <BarChart2 size={13} />, show: hasThreads },
   ];
 
   return (
-    <div className="border-t border-slate-700 bg-slate-950 flex flex-col overflow-hidden" style={{ height: '600px' }}>
+    <div className="border-t border-slate-700 bg-slate-950 flex flex-col">
       {/* Panel header with tabs + export button */}
       <div className="flex items-center px-3 border-b border-slate-700 shrink-0 h-10 gap-1">
         {TAB_CONFIG.filter(t => t.show).map(tab => (
@@ -86,7 +88,7 @@ const MetricsPanel = () => {
 
         <div className="ml-auto">
           <button
-            onClick={() => exportCSV(processMetrics, processMap)}
+            onClick={() => exportCSV(processMetrics, processMap, hasThreads ? threadMetrics : undefined)}
             disabled={!canExportCSV}
             title={!canExportCSV ? 'Available when simulation completes' : 'Export metrics as CSV'}
             className="flex items-center gap-1.5 text-xs text-slate-400 hover:text-slate-200 px-2.5 py-1 rounded-md hover:bg-slate-800 transition-colors disabled:opacity-40 disabled:cursor-not-allowed"
@@ -99,7 +101,7 @@ const MetricsPanel = () => {
       </div>
 
       {/* Tab content */}
-      <div className="flex-1 overflow-y-auto min-h-0">
+      <div>
         {activeTab === 'table' && (
           <MetricsTable metrics={processMetrics} processMap={processMap} />
         )}
@@ -112,6 +114,9 @@ const MetricsPanel = () => {
         {activeTab === 'threads' && (
           <ThreadMetricsTable metrics={threadMetrics} processMap={processMap} />
         )}
+        {activeTab === 'thread-charts' && (
+          <ThreadMetricsChart metrics={threadMetrics} processMap={processMap} />
+        )}
       </div>
     </div>
   );

src/components/MetricsPanel/ThreadMetricsChart.tsx

@@ -0,0 +1,215 @@
+import {
+  BarChart,
+  Bar,
+  XAxis,
+  YAxis,
+  Tooltip,
+  Legend,
+  ResponsiveContainer,
+  CartesianGrid,
+  RadarChart,
+  PolarGrid,
+  PolarAngleAxis,
+  Radar,
+} from 'recharts';
+import type { ThreadMetrics, Process } from '@core/types';
+import { deriveThreadColor } from '../shared/threadUtils';
+
+interface ThreadMetricsChartProps {
+  metrics: ThreadMetrics[];
+  processMap: Record<string, Process>;
+}
+
+const TOOLTIP_STYLE = {
+  backgroundColor: '#1e293b',
+  border: '1px solid #334155',
+  borderRadius: '8px',
+  fontSize: '11px',
+  color: '#e2e8f0',
+  boxShadow: '0 4px 12px rgba(0,0,0,0.4)',
+};
+
+const ChartBox = ({ height, children }: { height: number; children: React.ReactNode }) => (
+  <div style={{ width: '100%', height, overflow: 'hidden', flexShrink: 0 }}>
+    <ResponsiveContainer width="100%" height="100%">
+      {children as React.ReactElement}
+    </ResponsiveContainer>
+  </div>
+);
+
+const ThreadMetricsChart = ({ metrics, processMap }: ThreadMetricsChartProps) => {
+  if (metrics.length === 0) {
+    return (
+      <div className="flex items-center justify-center h-48 text-slate-500 text-sm">
+        No data available.
+      </div>
+    );
+  }
+
+  // Pre-compute thread colors in order of appearance
+  const threadIndexByProcess: Record<string, number> = {};
+  const threadColors: Record<string, string> = {};
+  metrics.forEach(m => {
+    if (threadIndexByProcess[m.processId] === undefined) {
+      threadIndexByProcess[m.processId] = 0;
+    }
+    const idx = threadIndexByProcess[m.processId]!;
+    const procColor = processMap[m.processId]?.color ?? '#94a3b8';
+    threadColors[`${m.processId}-${m.threadId}`] = deriveThreadColor(procColor, idx);
+    threadIndexByProcess[m.processId] = idx + 1;
+  });
+
+  const getThreadLabel = (m: ThreadMetrics) => {
+    const procName = processMap[m.processId]?.name ?? m.processId;
+    return `${procName}/${m.threadName}`;
+  };
+
+  const getThreadColor = (m: ThreadMetrics) =>
+    threadColors[`${m.processId}-${m.threadId}`] ?? '#94a3b8';
+
+  // ── Radar tooltip ──────────────────────────────────────────────
+  const labelToMetric = Object.fromEntries(metrics.map(m => [getThreadLabel(m), m]));
+
+  const radarTooltipContent = ({ active, payload, label }: { active?: boolean; payload?: readonly any[]; label?: string | number }) => {
+    if (!active || !payload?.length) return null;
+    return (
+      <div style={{ ...TOOLTIP_STYLE, padding: '8px 12px' }}>
+        <p style={{ fontSize: '10px', color: '#94a3b8', textTransform: 'uppercase', letterSpacing: '0.05em', fontWeight: 600, marginBottom: 4 }}>
+          {label}
+        </p>
+        {payload.map((entry: any) => {
+          const m = labelToMetric[entry.name];
+          return (
+            <div key={entry.name} style={{ display: 'flex', alignItems: 'center', gap: 6, fontSize: '11px', marginBottom: 2 }}>
+              <span style={{ width: 8, height: 8, borderRadius: '50%', backgroundColor: entry.color, flexShrink: 0, display: 'inline-block' }} />
+              <span style={{ color: '#cbd5e1' }}>{m ? getThreadLabel(m) : entry.name}</span>
+              <span style={{ marginLeft: 'auto', paddingLeft: 12, fontFamily: 'monospace', color: '#e2e8f0' }}>
+                {typeof entry.value === 'number' ? `${entry.value.toFixed(1)}%` : '-'}
+              </span>
+            </div>
+          );
+        })}
+      </div>
+    );
+  };
+
+  // ── Stacked bar data ──────────────────────────────────────────
+  const barData = metrics.map(m => ({
+    name: getThreadLabel(m),
+    'Waiting': m.waitingTime,
+    'CPU': m.cpuTime,
+    'I/O': m.ioTime,
+  }));
+
+  // ── Radar chart data (normalized 0-100 per dimension) ─────────
+  const maxT   = Math.max(...metrics.map(m => m.turnaroundTime), 1);
+  const maxR   = Math.max(...metrics.map(m => m.responseTime), 1);
+  const maxW   = Math.max(...metrics.map(m => m.waitingTime), 1);
+  const maxCpu = Math.max(...metrics.map(m => m.cpuTime), 1);
+  const maxIo  = Math.max(...metrics.map(m => m.ioTime), 1);
+
+  const radarDimensions = ['Turnaround', 'Response', 'Waiting', 'CPU Time', 'I/O Time'] as const;
+
+  const radarData = radarDimensions.map(dim => {
+    const row: Record<string, string | number> = { dimension: dim };
+    metrics.forEach(m => {
+      const key = getThreadLabel(m);
+      switch (dim) {
+        case 'Turnaround': row[key] = (m.turnaroundTime / maxT)   * 100; break;
+        case 'Response':   row[key] = (m.responseTime   / maxR)   * 100; break;
+        case 'Waiting':    row[key] = (m.waitingTime    / maxW)   * 100; break;
+        case 'CPU Time':   row[key] = (m.cpuTime        / maxCpu) * 100; break;
+        case 'I/O Time':   row[key] = (m.ioTime         / maxIo)  * 100; break;
+      }
+    });
+    return row;
+  });
+
+  const showRadar = metrics.length >= 2;
+
+  return (
+    <div className="p-3 flex flex-col gap-6">
+      {/* ── Radar chart ───────────────────────────────────────── */}
+      {showRadar && (
+        <div className="w-full">
+          <p className="text-[10px] text-slate-400 uppercase tracking-wider mb-1 font-medium text-center">
+            Comparative Profile (normalized)
+          </p>
+          <ChartBox height={360}>
+            <RadarChart data={radarData} margin={{ top: 8, right: 20, bottom: 8, left: 20 }}>
+              <PolarGrid stroke="#334155" />
+              <PolarAngleAxis
+                dataKey="dimension"
+                tick={{ fill: '#94a3b8', fontSize: 10 }}
+              />
+              {metrics.map(m => (
+                <Radar
+                  key={`${m.processId}-${m.threadId}`}
+                  name={getThreadLabel(m)}
+                  dataKey={getThreadLabel(m)}
+                  stroke={getThreadColor(m)}
+                  fill={getThreadColor(m)}
+                  fillOpacity={0.15}
+                  strokeWidth={2}
+                  dot={{ r: 3, fill: getThreadColor(m) }}
+                />
+              ))}
+              <Tooltip content={radarTooltipContent} />
+              <Legend
+                wrapperStyle={{ fontSize: '10px', paddingTop: '4px', color: '#94a3b8' }}
+              />
+            </RadarChart>
+          </ChartBox>
+        </div>
+      )}
+
+      {/* ── Stacked bar chart ─────────────────────────────────── */}
+      <div className="w-full">
+        <p className="text-[10px] text-slate-400 uppercase tracking-wider mb-1 font-medium text-center">
+          Breakdown per Thread (ticks)
+        </p>
+        <ChartBox height={360}>
+          <BarChart data={barData} margin={{ top: 8, right: 12, left: -8, bottom: 48 }}>
+            <CartesianGrid strokeDasharray="3 3" stroke="#1e293b" vertical={false} />
+            <XAxis
+              dataKey="name"
+              tick={{ fill: '#94a3b8', fontSize: 10 }}
+              axisLine={{ stroke: '#334155' }}
+              tickLine={false}
+              angle={-35}
+              textAnchor="end"
+              interval={0}
+            />
+            <YAxis
+              tick={{ fill: '#94a3b8', fontSize: 10 }}
+              axisLine={false}
+              tickLine={false}
+              label={{
+                value: 'ticks',
+                angle: -90,
+                position: 'insideLeft',
+                offset: 14,
+                style: { fill: '#475569', fontSize: 9 },
+              }}
+            />
+            <Tooltip
+              contentStyle={TOOLTIP_STYLE}
+              cursor={{ fill: 'rgba(255,255,255,0.04)' }}
+            />
+            <Legend
+              wrapperStyle={{ fontSize: '10px', paddingTop: '4px', color: '#94a3b8' }}
+            />
+            <Bar dataKey="Waiting" stackId="a" fill="#f59e0b" radius={[0, 0, 0, 0]} />
+            <Bar dataKey="CPU"     stackId="a" fill="#22c55e" radius={[0, 0, 0, 0]} />
+            <Bar dataKey="I/O"     stackId="a" fill="#06b6d4" radius={[4, 4, 0, 0]} />
+          </BarChart>
+        </ChartBox>
+        <p className="text-center text-[9px] text-slate-600 mt-0.5">
+          Waiting + CPU + I/O = Turnaround
+        </p>
+      </div>
+    </div>
+  );
+};
+
+export default ThreadMetricsChart;

src/core/engine.ts

@@ -551,6 +551,24 @@ export class SimulationEngine {
       // ── CPU burst da thread concluído ────────────────────────────────────
       this._activeThreads.set(processId, null);
       this._handleThreadBurstComplete(cpu, activeThread, process);
+
+      // Se o quantum do processo também expirou neste mesmo tick, cede a CPU
+      // agora (após tratar o burst) em vez de dar um tick extra ao processo.
+      if (this._cpuProcess !== null && this._algorithm.isQuantumExpired(cpu, this._config)) {
+        const activeAfter = this._activeThreads.get(processId) ?? null;
+        if (activeAfter !== null) {
+          this._transitionThread(activeAfter, "Ready");
+          if (policy === "RR") {
+            this._readyThreadQueues.get(processId)!.push(activeAfter);
+          } else {
+            this._readyThreadQueues.get(processId)!.unshift(activeAfter);
+          }
+          this._activeThreads.set(processId, null);
+        }
+        this._transition(cpu, "Ready");
+        this._readyQueue.push(cpu);
+        this._cpuProcess = null;
+      }
     } else if (scheduler.isQuantumExpired(activeThread)) {
       // ── Quantum intra-processo expirou (RR): rotaciona thread ────────────
       this._transitionThread(activeThread, "Ready");

src/hooks/useExport.ts

@@ -1,5 +1,4 @@
-import type { ProcessMetrics } from "@core/types";
+import type { ProcessMetrics, ThreadMetrics, Process } from "@core/types";
-import type { Process } from "@core/types";
 
 interface ProcessMap {
   [id: string]: Process;
@@ -16,8 +15,13 @@ function downloadBlob(content: string, filename: string, mimeType: string) {
 }
 
 export function useExport() {
-  const exportCSV = (metrics: ProcessMetrics[], processMap: ProcessMap) => {
+  const exportCSV = (
-    const headers = [
+    metrics: ProcessMetrics[],
+    processMap: ProcessMap,
+    threadMetrics?: ThreadMetrics[],
+  ) => {
+    // ── Seção de processos ─────────────────────────────────────────────────
+    const processHeaders = [
       "PID",
       "Process",
       "Priority",
@@ -33,7 +37,7 @@ export function useExport() {
       "Bound",
     ];
 
-    const rows = metrics.map((m) => {
+    const processRows = metrics.map((m) => {
       const proc = processMap[m.processId];
       const pid = proc?.pid ?? "";
       const name = proc?.name ?? m.processId;
@@ -55,7 +59,48 @@ export function useExport() {
       ].join(",");
     });
 
-    const csv = [headers.join(","), ...rows].join("\n");
+    const sections: string[] = [
+      "# Processes",
+      processHeaders.join(","),
+      ...processRows,
+    ];
+
+    // ── Seção de threads (opcional) ────────────────────────────────────────
+    if (threadMetrics && threadMetrics.length > 0) {
+      const threadHeaders = [
+        "Thread",
+        "Process",
+        "Arrival",
+        "Start",
+        "Finish",
+        "Response",
+        "Turnaround",
+        "Waiting",
+        "CPU Time",
+        "I/O Time",
+      ];
+
+      const threadRows = threadMetrics.map((t) => {
+        const proc = processMap[t.processId];
+        const procName = proc?.name ?? t.processId;
+        return [
+          t.threadName,
+          procName,
+          t.arrivalTime,
+          t.startTick,
+          t.finishTick,
+          t.responseTime,
+          t.turnaroundTime,
+          t.waitingTime,
+          t.cpuTime,
+          t.ioTime,
+        ].join(",");
+      });
+
+      sections.push("", "# Threads", threadHeaders.join(","), ...threadRows);
+    }
+
+    const csv = sections.join("\n");
     downloadBlob(csv, "pss-metrics.csv", "text/csv;charset=utf-8;");
   };