Upgrade dashboard, builder, and agent resource controls.

Dark UI with hashrate graphs, inline setting help, percent-based threads/RAM, configurable process name and display modes, and LAN-aware run.bat startup banner.

server/web/src/pages/AgentsPage.tsx

@@ -1,6 +1,7 @@
 import { useState, useEffect } from 'react';
 import { api } from '../api/client';
 import type { Agent, HashrateSample } from '../types';
+import HashrateChart from '../components/Charts/HashrateChart';
 import './Pages.css';
 
 export default function AgentsPage() {
@@ -152,7 +153,22 @@ export default function AgentsPage() {
 
               {hashrateHistory.length > 0 && (
                 <div className="detail-section">
-                  <h3>Hashrate History (last {hashrateHistory.length} samples)</h3>
+                  <h3>Hashrate History</h3>
+                  <HashrateChart
+                    title=""
+                    color="#22c55e"
+                    unit="H/s"
+                    data={[...hashrateHistory].reverse().map((s) => ({
+                      time: new Date(s.timestamp).toLocaleTimeString(),
+                      value: s.hashrate,
+                    }))}
+                  />
+                </div>
+              )}
+
+              {hashrateHistory.length > 0 && (
+                <div className="detail-section">
+                  <h3>Raw Samples ({hashrateHistory.length})</h3>
                   <div className="hashrate-chart">
                     {hashrateHistory.reverse().map((sample, i) => (
                       <div