Add uptime monitor features: fix history bars, lifetime stats, detail modal, custom services

- Fix 24-bar history rendering to always show 24 uniform segments with gray fill for missing hours
- Add lifetime uptime % and avg latency to status API
- Add clickable detail modal with expanded stats, large history bar, and service removal
- Add monitored_services DB table with CRUD API (GET/POST/DELETE)
- Monitor reads services from DB each interval, seeds defaults on first run
- Add inline form to add custom services to track
- Extend log retention from 7 days to 90 days for lifetime stats

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

monitor.js

@@ -2,12 +2,46 @@ const sqlite3 = require('sqlite3');
 const { open } = require('sqlite');
 // Node 18+ has global fetch built-in
 
-const SERVICES = [
+const DEFAULT_SERVICES = [
     { name: 'Website', url: 'https://akkolli.net' },
     { name: 'Gitea', url: 'https://code.akkolli.net' },
     { name: 'Nextcloud', url: 'http://host.docker.internal:6060' },
 ];
 
+async function getServices(db) {
+    try {
+        const rows = await db.all('SELECT name, url FROM monitored_services');
+        if (rows && rows.length > 0) return rows;
+    } catch (e) {
+        // Table might not exist yet
+    }
+    return DEFAULT_SERVICES;
+}
+
+async function seedDefaults(db) {
+    // Ensure monitored_services table exists
+    await db.exec(`
+    CREATE TABLE IF NOT EXISTS monitored_services (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      name TEXT NOT NULL UNIQUE,
+      url TEXT NOT NULL,
+      created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+    );
+  `);
+
+    // Seed defaults if table is empty
+    const count = await db.get('SELECT COUNT(*) as cnt FROM monitored_services');
+    if (count.cnt === 0) {
+        for (const s of DEFAULT_SERVICES) {
+            await db.run(
+                'INSERT OR IGNORE INTO monitored_services (name, url) VALUES (?, ?)',
+                s.name, s.url
+            );
+        }
+        console.log('Seeded default services into monitored_services');
+    }
+}
+
 async function monitor() {
     console.log('Starting monitoring loop...');
 
@@ -30,11 +64,16 @@ async function monitor() {
     );
   `);
 
+    await seedDefaults(db);
+
     setInterval(async () => {
         console.log('Running checks...');
         const now = new Date().toISOString();
 
-        for (const service of SERVICES) {
+        // Re-read services each interval so new additions are picked up
+        const services = await getServices(db);
+
+        for (const service of services) {
             const start = performance.now();
             let status = 'down';
             let latency = 0;
@@ -57,7 +96,6 @@ async function monitor() {
             } catch (err) {
                 status = 'down';
                 latency = 0;
-                // console.error(`Failed to reach ${service.name}:`, err.message);
             }
 
             try {
@@ -70,9 +108,9 @@ async function monitor() {
             }
         }
 
-        // Prune old logs (keep 7 days)
+        // Prune old logs (keep 90 days for lifetime stats)
         try {
-            await db.run(`DELETE FROM uptime_logs WHERE timestamp < datetime('now', '-7 days')`);
+            await db.run(`DELETE FROM uptime_logs WHERE timestamp < datetime('now', '-90 days')`);
         } catch (e) { }
 
     }, 60000); // Run every minute