feat(ToolsPage): add firmware management overlay with installation functionality

src/app/components/GeneralPage.tsx

@@ -1,9 +1,30 @@
+import { useEffect, useState } from 'react';
+import { getFileContents } from '../webdav';
+
 interface GeneralPageProps {
   config: any;
   setConfig: (config: any) => void;
 }
 
 export default function GeneralPage({ config, setConfig }: GeneralPageProps) {
+  const [timezones, setTimezones] = useState<string[] | null>(null);
+  const [tzError, setTzError] = useState(false);
+
+  useEffect(() => {
+    getFileContents('/.sys/timezones.json')
+      .then(async (blob) => {
+        const parsed = JSON.parse(await blob.text());
+        if (Array.isArray(parsed)) {
+          setTimezones(parsed.map((e: any) => (typeof e === 'string' ? e : String(e.name ?? e.value ?? e))));
+        } else if (parsed && typeof parsed === 'object') {
+          setTimezones(Object.keys(parsed));
+        } else {
+          setTzError(true);
+        }
+      })
+      .catch(() => setTzError(true));
+  }, []);
+
   const updateSetting = (path: string[], value: any) => {
     const newConfig = JSON.parse(JSON.stringify(config));
     let current = newConfig;
@@ -51,13 +72,29 @@ export default function GeneralPage({ config, setConfig }: GeneralPageProps) {
 
         <div className="p-4">
           <label className="text-sm text-neutral-500 block mb-2">Timezone</label>
+          {!tzError && timezones ? (
+            <select
+              value={general.timezone || ''}
+              onChange={(e) => updateSetting(['general', 'timezone'], e.target.value)}
+              className="w-full px-3 py-2 border border-neutral-300 rounded-lg"
+            >
+              {general.timezone && !timezones.includes(general.timezone) && (
+                <option value={general.timezone}>{general.timezone}</option>
+              )}
+              {timezones.map((tz) => (
+                <option key={tz} value={tz}>{tz}</option>
+              ))}
+            </select>
+          ) : (
             <input
               type="text"
               value={general.timezone || ''}
               onChange={(e) => updateSetting(['general', 'timezone'], e.target.value)}
-            placeholder="America/Los_Angeles"
-            className="w-full px-3 py-2 border border-neutral-300 rounded-lg"
+              placeholder={timezones === null && !tzError ? 'Loading…' : 'America/Los_Angeles'}
+              disabled={timezones === null && !tzError}
+              className="w-full px-3 py-2 border border-neutral-300 rounded-lg disabled:opacity-50"
             />
+          )}
         </div>
 
         <div className="p-4">

src/app/components/ToolsPage.tsx

@@ -1,12 +1,145 @@
-import { Wrench, Download, Upload, RotateCcw, Database, FileText, HardDrive } from 'lucide-react';
+import { useState, useEffect } from 'react';
+import { Wrench, Download, Upload, RotateCcw, Database, FileText, HardDrive, X, Loader2, Cpu, ChevronRight, AlertCircle } from 'lucide-react';
 import { toast } from 'sonner';
+import { getFileContents, putFileContents, humanFileSize } from '../webdav';
 
 interface ToolsPageProps {
   config: any;
   setConfig: (config: any) => void;
 }
 
+interface FirmwareEntry {
+  version: string;
+  date: string;
+  description: string;
+  url: string;
+  size?: number;
+}
+
+function FirmwareOverlay({ onClose }: { onClose: () => void }) {
+  const [entries, setEntries] = useState<FirmwareEntry[] | null>(null);
+  const [loadError, setLoadError] = useState<string | null>(null);
+  const [installing, setInstalling] = useState<string | null>(null);
+
+  useEffect(() => {
+    getFileContents('/.sys/firmware.json')
+      .then(async (blob) => {
+        const parsed = JSON.parse(await blob.text());
+        if (Array.isArray(parsed)) {
+          setEntries(parsed);
+        } else {
+          setLoadError('Unexpected firmware manifest format.');
+        }
+      })
+      .catch((e: any) => setLoadError(e?.message || 'Failed to load firmware list.'));
+  }, []);
+
+  const install = async (entry: FirmwareEntry) => {
+    setInstalling(entry.url);
+    try {
+      let data: ArrayBuffer;
+      if (/^https?:\/\//.test(entry.url)) {
+        const r = await fetch(entry.url);
+        if (!r.ok) throw new Error(`Download failed: ${r.status} ${r.statusText}`);
+        data = await r.arrayBuffer();
+      } else {
+        const blob = await getFileContents(entry.url);
+        data = await blob.arrayBuffer();
+      }
+      await putFileContents('/sd/.bin', data);
+      toast.success(`Firmware ${entry.version} saved to /sd/.bin`);
+      onClose();
+    } catch (e: any) {
+      toast.error(`Install failed: ${e?.message || String(e)}`);
+    } finally {
+      setInstalling(null);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 bg-white z-50 flex flex-col">
+      <div className="flex items-center justify-between p-4 border-b border-neutral-200">
+        <div>
+          <h2 className="font-semibold text-lg">Change Firmware</h2>
+          <p className="text-xs text-neutral-500 mt-0.5">Selected firmware will be saved to /sd/.bin</p>
+        </div>
+        <button onClick={onClose} className="p-2 -m-2 hover:bg-neutral-100 rounded-lg">
+          <X className="w-6 h-6" />
+        </button>
+      </div>
+
+      <div className="flex-1 overflow-y-auto p-4 space-y-3">
+        {entries === null && !loadError && (
+          <div className="flex flex-col items-center justify-center gap-3 py-16 text-neutral-500">
+            <Loader2 className="w-6 h-6 animate-spin" />
+            <span className="text-sm">Loading firmware list…</span>
+          </div>
+        )}
+
+        {loadError && (
+          <div className="flex items-start gap-3 p-4 bg-red-50 border border-red-200 rounded-lg text-sm text-red-700">
+            <AlertCircle className="w-5 h-5 flex-shrink-0 mt-0.5" />
+            <span>{loadError}</span>
+          </div>
+        )}
+
+        {entries && entries.length === 0 && (
+          <div className="text-center py-16 text-sm text-neutral-500">
+            No firmware updates available.
+          </div>
+        )}
+
+        {entries && entries.map((entry) => {
+          const isInstalling = installing === entry.url;
+          const busy = installing !== null;
+          return (
+            <div key={entry.url} className="border border-neutral-200 rounded-lg p-4">
+              <div className="flex items-start gap-3">
+                <div className="flex-1 min-w-0">
+                  <div className="flex flex-wrap items-center gap-2 mb-1">
+                    <span className="font-semibold text-neutral-900">{entry.version}</span>
+                    <span className="text-xs text-neutral-400">{entry.date}</span>
+                    {entry.size != null && (
+                      <span className="text-xs text-neutral-400">· {humanFileSize(entry.size)}</span>
+                    )}
+                  </div>
+                  <p className="text-sm text-neutral-600 leading-snug">{entry.description}</p>
+                </div>
+                <button
+                  onClick={() => void install(entry)}
+                  disabled={busy}
+                  className={`flex-shrink-0 flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-sm font-medium transition ${
+                    isInstalling
+                      ? 'bg-blue-100 text-blue-600'
+                      : busy
+                      ? 'bg-neutral-100 text-neutral-400 cursor-not-allowed'
+                      : 'bg-blue-600 text-white hover:bg-blue-700'
+                  }`}
+                >
+                  {isInstalling ? (
+                    <>
+                      <Loader2 className="w-3.5 h-3.5 animate-spin" />
+                      Installing
+                    </>
+                  ) : (
+                    <>
+                      <Download className="w-3.5 h-3.5" />
+                      Install
+                    </>
+                  )}
+                </button>
+              </div>
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}
+
 export default function ToolsPage({ config }: ToolsPageProps) {
+  const [showFirmware, setShowFirmware] = useState(false);
+
   const handleBackup = () => {
     const dataStr = JSON.stringify(config, null, 2);
     const dataUri = 'data:application/json;charset=utf-8,' + encodeURIComponent(dataStr);
@@ -140,32 +273,6 @@ export default function ToolsPage({ config }: ToolsPageProps) {
       <h2 className="text-sm text-neutral-500 pt-4">System</h2>
 
       <div className="bg-white border border-neutral-200 rounded-lg divide-y divide-neutral-200">
-        <button
-          onClick={handleSystemUpdate}
-          className="w-full p-4 flex items-center gap-3 hover:bg-neutral-50 text-left"
-        >
-          <div className="w-10 h-10 bg-purple-100 rounded-lg flex items-center justify-center">
-            <Download className="w-5 h-5 text-purple-600" />
-          </div>
-          <div className="flex-1">
-            <div className="font-medium">System Update</div>
-            <div className="text-sm text-neutral-500">Check for firmware updates</div>
-          </div>
-        </button>
-
-        <button
-          onClick={handleExportLogs}
-          className="w-full p-4 flex items-center gap-3 hover:bg-neutral-50 text-left"
-        >
-          <div className="w-10 h-10 bg-neutral-100 rounded-lg flex items-center justify-center">
-            <FileText className="w-5 h-5 text-neutral-600" />
-          </div>
-          <div className="flex-1">
-            <div className="font-medium">Export System Logs</div>
-            <div className="text-sm text-neutral-500">Download diagnostic logs</div>
-          </div>
-        </button>
-
         <div className="p-4">
           <div className="flex items-center gap-3 mb-3">
             <div className="w-10 h-10 bg-neutral-100 rounded-lg flex items-center justify-center">
@@ -190,7 +297,50 @@ export default function ToolsPage({ config }: ToolsPageProps) {
             </div>
           </div>
         </div>
+        
+        <button
+          onClick={handleSystemUpdate}
+          className="w-full p-4 flex items-center gap-3 hover:bg-neutral-50 text-left"
+        >
+          <div className="w-10 h-10 bg-purple-100 rounded-lg flex items-center justify-center">
+            <Download className="w-5 h-5 text-purple-600" />
           </div>
+          <div className="flex-1">
+            <div className="font-medium">System Update</div>
+            <div className="text-sm text-neutral-500">Check for firmware updates</div>
+          </div>
+        </button>
+
+        <button
+          onClick={() => setShowFirmware(true)}
+          className="w-full p-4 flex items-center gap-3 hover:bg-neutral-50 text-left"
+        >
+          <div className="w-10 h-10 bg-purple-100 rounded-lg flex items-center justify-center">
+            <Cpu className="w-5 h-5 text-purple-600" />
+          </div>
+          <div className="flex-1">
+            <div className="font-medium">Change Firmware</div>
+            <div className="text-sm text-neutral-500">Select a firmware version to install</div>
+          </div>
+          <ChevronRight className="w-4 h-4 text-neutral-400" />
+        </button>
+
+        <button
+          onClick={handleExportLogs}
+          className="w-full p-4 flex items-center gap-3 hover:bg-neutral-50 text-left"
+        >
+          <div className="w-10 h-10 bg-neutral-100 rounded-lg flex items-center justify-center">
+            <FileText className="w-5 h-5 text-neutral-600" />
+          </div>
+          <div className="flex-1">
+            <div className="font-medium">Export System Logs</div>
+            <div className="text-sm text-neutral-500">Download diagnostic logs</div>
+          </div>
+        </button>
+
+      </div>
+
+      {showFirmware && <FirmwareOverlay onClose={() => setShowFirmware(false)} />}
     </div>
   );
 }