feat: web server with REST API, captive portal, and management UI

Co-authored-by: Cursor <cursoragent@cursor.com>

data/setup.html

@@ -0,0 +1,89 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>PaperColor Setup</title>
+    <style>
+        * { box-sizing: border-box; margin: 0; padding: 0; }
+        body { font-family: -apple-system, sans-serif; max-width: 400px; margin: 40px auto; padding: 20px; background: #f5f5f5; }
+        h1 { margin-bottom: 20px; color: #333; }
+        .field { margin-bottom: 16px; }
+        label { display: block; font-weight: 600; margin-bottom: 4px; color: #555; }
+        input, select { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 6px; font-size: 16px; }
+        button { width: 100%; padding: 12px; background: #2563eb; color: white; border: none; border-radius: 6px; font-size: 16px; cursor: pointer; margin-top: 10px; }
+        button:hover { background: #1d4ed8; }
+        .status { margin-top: 16px; padding: 10px; border-radius: 6px; display: none; }
+        .status.error { display: block; background: #fee2e2; color: #991b1b; }
+        .status.success { display: block; background: #d1fae5; color: #065f46; }
+        #networks { margin-bottom: 16px; }
+    </style>
+</head>
+<body>
+    <h1>PaperColor Setup</h1>
+    <form id="setupForm">
+        <div class="field">
+            <label>WiFi Network</label>
+            <select id="wifiSsid"><option value="">Scanning...</option></select>
+        </div>
+        <div class="field">
+            <label>WiFi Password</label>
+            <input type="password" id="wifiPass" required>
+        </div>
+        <div class="field">
+            <label>Immich URL</label>
+            <input type="url" id="immichUrl" value="https://photos.example.com">
+        </div>
+        <div class="field">
+            <label>Immich API Key</label>
+            <input type="text" id="immichKey" required placeholder="Your API key">
+        </div>
+        <button type="submit">Save & Connect</button>
+    </form>
+    <div id="status" class="status"></div>
+
+    <script>
+        async function scanNetworks() {
+            try {
+                const res = await fetch('/api/wifi/scan');
+                const networks = await res.json();
+                const select = document.getElementById('wifiSsid');
+                select.innerHTML = networks.map(n =>
+                    `<option value="${n.ssid}">${n.ssid} (${n.rssi}dBm)</option>`
+                ).join('');
+            } catch (e) {
+                console.error('Scan failed:', e);
+            }
+        }
+
+        document.getElementById('setupForm').addEventListener('submit', async (e) => {
+            e.preventDefault();
+            const status = document.getElementById('status');
+            try {
+                const res = await fetch('/api/setup', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({
+                        wifi_ssid: document.getElementById('wifiSsid').value,
+                        wifi_pass: document.getElementById('wifiPass').value,
+                        immich_url: document.getElementById('immichUrl').value,
+                        immich_key: document.getElementById('immichKey').value
+                    })
+                });
+                const data = await res.json();
+                if (data.ok) {
+                    status.className = 'status success';
+                    status.textContent = 'Saved! Device is rebooting...';
+                } else {
+                    throw new Error(data.error || 'Unknown error');
+                }
+            } catch (e) {
+                status.className = 'status error';
+                status.textContent = 'Error: ' + e.message;
+            }
+        });
+
+        scanNetworks();
+    </script>
+</body>
+</html>