Standardize all timestamps to UTC ISO-8601 format

- Update schema.sql defaults from datetime('now') to strftime('%Y-%m-%dT%H:%M:%fZ', 'now')
- Update schema-admin.sql with same UTC format
- Update AdminService.js inline table creation and query comparisons
- Update system.js time-based query comparisons
- Add documentation to time.js explaining UTC format convention

src/db/schema-admin.sql

@@ -16,7 +16,7 @@ CREATE TABLE IF NOT EXISTS admin_audit_log (
   notes TEXT,
   ip_address TEXT,
   user_agent TEXT,
-  created_at TEXT NOT NULL DEFAULT (datetime('now'))
+  created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 CREATE INDEX IF NOT EXISTS idx_audit_log_admin ON admin_audit_log(admin_id);
@@ -35,7 +35,7 @@ CREATE TABLE IF NOT EXISTS mint_merges (
   target_mint_id TEXT NOT NULL,
   reason TEXT,
   status TEXT NOT NULL DEFAULT 'active' CHECK (status IN ('active', 'reverted')),
-  merged_at TEXT NOT NULL DEFAULT (datetime('now')),
+  merged_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   reverted_at TEXT,
   admin_id TEXT NOT NULL,
   -- Store affected data for potential reversal

src/db/schema.sql

@@ -19,8 +19,8 @@ CREATE TABLE IF NOT EXISTS mints (
   last_success_at TEXT,
   last_failure_at TEXT,
   consecutive_failures INTEGER DEFAULT 0,
-  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
-  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+  updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 CREATE INDEX IF NOT EXISTS idx_mints_status ON mints(status);
@@ -34,8 +34,8 @@ CREATE TABLE IF NOT EXISTS mint_urls (
   url_normalized TEXT NOT NULL,
   type TEXT NOT NULL DEFAULT 'clearnet' CHECK (type IN ('clearnet', 'tor', 'mirror')),
   active INTEGER NOT NULL DEFAULT 1,
-  discovered_at TEXT NOT NULL DEFAULT (datetime('now')),
+  discovered_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
-  last_seen_at TEXT NOT NULL DEFAULT (datetime('now'))
+  last_seen_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 CREATE INDEX IF NOT EXISTS idx_mint_urls_mint_id ON mint_urls(mint_id);
@@ -51,7 +51,7 @@ CREATE TABLE IF NOT EXISTS probes (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   mint_id TEXT NOT NULL REFERENCES mints(mint_id) ON DELETE CASCADE,
   url TEXT NOT NULL,
-  probed_at TEXT NOT NULL DEFAULT (datetime('now')),
+  probed_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   success INTEGER NOT NULL,
   status_code INTEGER,
   rtt_ms INTEGER,
@@ -77,7 +77,7 @@ CREATE TABLE IF NOT EXISTS uptime_rollups (
   total_checks INTEGER NOT NULL DEFAULT 0,
   ok_checks INTEGER NOT NULL DEFAULT 0,
   incident_count INTEGER NOT NULL DEFAULT 0,
-  computed_at TEXT NOT NULL DEFAULT (datetime('now')),
+  computed_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   UNIQUE(mint_id, window, period_start)
 );
 
@@ -117,14 +117,14 @@ CREATE TABLE IF NOT EXISTS metadata_snapshots (
   server_time TEXT,
   raw_json TEXT,  -- Full raw response
   content_hash TEXT,
-  last_fetched_at TEXT NOT NULL DEFAULT (datetime('now'))
+  last_fetched_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 -- Metadata History: All changes (append-only)
 CREATE TABLE IF NOT EXISTS metadata_history (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   mint_id TEXT NOT NULL REFERENCES mints(mint_id) ON DELETE CASCADE,
-  fetched_at TEXT NOT NULL DEFAULT (datetime('now')),
+  fetched_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   change_type TEXT NOT NULL CHECK (change_type IN ('initial', 'update', 'error')),
   diff TEXT,  -- JSON diff of changes
   content_hash TEXT,
@@ -150,7 +150,7 @@ CREATE TABLE IF NOT EXISTS nostr_events (
   tags TEXT,  -- JSON array
   sig TEXT NOT NULL,
   raw_json TEXT NOT NULL,
-  ingested_at TEXT NOT NULL DEFAULT (datetime('now'))
+  ingested_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 CREATE INDEX IF NOT EXISTS idx_nostr_events_event_id ON nostr_events(event_id);
@@ -168,7 +168,7 @@ CREATE TABLE IF NOT EXISTS reviews (
   created_at INTEGER NOT NULL,
   rating INTEGER CHECK (rating >= 1 AND rating <= 5),
   content TEXT,
-  parsed_at TEXT NOT NULL DEFAULT (datetime('now'))
+  parsed_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 CREATE INDEX IF NOT EXISTS idx_reviews_mint_id ON reviews(mint_id);
@@ -185,7 +185,7 @@ CREATE TABLE IF NOT EXISTS trust_scores (
   score_total INTEGER NOT NULL CHECK (score_total >= 0 AND score_total <= 100),
   score_level TEXT NOT NULL CHECK (score_level IN ('unknown', 'low', 'medium', 'high', 'excellent')),
   breakdown TEXT NOT NULL,  -- JSON breakdown of score components
-  computed_at TEXT NOT NULL DEFAULT (datetime('now')),
+  computed_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   UNIQUE(mint_id, computed_at)
 );
 
@@ -210,7 +210,7 @@ CREATE TABLE IF NOT EXISTS pageviews (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   mint_id TEXT NOT NULL REFERENCES mints(mint_id) ON DELETE CASCADE,
   session_id TEXT NOT NULL,
-  viewed_at TEXT NOT NULL DEFAULT (datetime('now')),
+  viewed_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   user_agent TEXT,
   referer TEXT
 );
@@ -228,7 +228,7 @@ CREATE TABLE IF NOT EXISTS pageview_rollups (
   period_end TEXT NOT NULL,
   view_count INTEGER NOT NULL DEFAULT 0,
   unique_sessions INTEGER NOT NULL DEFAULT 0,
-  computed_at TEXT NOT NULL DEFAULT (datetime('now')),
+  computed_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   UNIQUE(mint_id, window, period_start)
 );
 
@@ -244,13 +244,13 @@ CREATE TABLE IF NOT EXISTS jobs (
   payload TEXT,  -- JSON
   status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'running', 'completed', 'failed')),
   priority INTEGER NOT NULL DEFAULT 0,
-  run_at TEXT NOT NULL DEFAULT (datetime('now')),
+  run_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
   started_at TEXT,
   completed_at TEXT,
   retries INTEGER NOT NULL DEFAULT 0,
   max_retries INTEGER NOT NULL DEFAULT 3,
   error_message TEXT,
-  created_at TEXT NOT NULL DEFAULT (datetime('now'))
+  created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 CREATE INDEX IF NOT EXISTS idx_jobs_status_run_at ON jobs(status, run_at);
@@ -264,7 +264,7 @@ CREATE TABLE IF NOT EXISTS system_stats (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   stat_name TEXT NOT NULL,
   stat_value TEXT NOT NULL,
-  recorded_at TEXT NOT NULL DEFAULT (datetime('now'))
+  recorded_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
 );
 
 CREATE INDEX IF NOT EXISTS idx_system_stats_name ON system_stats(stat_name);

src/routes/system.js

@@ -75,7 +75,7 @@ router.get('/stats', async(req, res) => {
         // Recent activity
         const probeResult = queryOne(`
       SELECT COUNT(*) as count FROM probes 
-      WHERE probed_at >= datetime('now', '-24 hours')
+      WHERE probed_at >= strftime('%Y-%m-%dT%H:%M:%fZ', 'now', '-24 hours')
     `);
         const probeCount = probeResult ? probeResult.count : 0;
 
@@ -86,7 +86,7 @@ router.get('/stats', async(req, res) => {
 
         const incidentResult = queryOne(`
       SELECT COUNT(*) as count FROM incidents 
-      WHERE started_at >= datetime('now', '-7 days')
+      WHERE started_at >= strftime('%Y-%m-%dT%H:%M:%fZ', 'now', '-7 days')
     `);
         const incidentCount = incidentResult ? incidentResult.count : 0;
 
@@ -147,7 +147,7 @@ router.get('/stats/timeline', (req, res) => {
         COUNT(*) as total,
         SUM(CASE WHEN success = 1 THEN 1 ELSE 0 END) as successful
       FROM probes
-      WHERE probed_at >= datetime('now', '-${numDays} days')
+      WHERE probed_at >= strftime('%Y-%m-%dT%H:%M:%fZ', 'now', '-${numDays} days')
       GROUP BY date(probed_at)
       ORDER BY date ASC
     `);
@@ -158,7 +158,7 @@ router.get('/stats/timeline', (req, res) => {
         date(started_at) as date,
         COUNT(*) as count
       FROM incidents
-      WHERE started_at >= datetime('now', '-${numDays} days')
+      WHERE started_at >= strftime('%Y-%m-%dT%H:%M:%fZ', 'now', '-${numDays} days')
       GROUP BY date(started_at)
       ORDER BY date ASC
     `);

src/services/AdminService.js

@@ -36,7 +36,7 @@ export function initAdminSchema() {
       notes TEXT,
       ip_address TEXT,
       user_agent TEXT,
-      created_at TEXT NOT NULL DEFAULT (datetime('now'))
+      created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
     )
   `);
 
@@ -49,7 +49,7 @@ export function initAdminSchema() {
       target_mint_id TEXT NOT NULL,
       reason TEXT,
       status TEXT NOT NULL DEFAULT 'active',
-      merged_at TEXT NOT NULL DEFAULT (datetime('now')),
+      merged_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
       reverted_at TEXT,
       admin_id TEXT NOT NULL,
       affected_urls TEXT,
@@ -701,12 +701,12 @@ export function getSystemMetrics() {
 
     const probesLastMinute = getCount(queryOne(`
     SELECT COUNT(*) as count FROM probes 
-    WHERE probed_at >= datetime('now', '-1 minute')
+    WHERE probed_at >= strftime('%Y-%m-%dT%H:%M:%fZ', 'now', '-1 minute')
   `));
 
     const failedProbesLastMinute = getCount(queryOne(`
     SELECT COUNT(*) as count FROM probes 
-    WHERE probed_at >= datetime('now', '-1 minute') AND success = 0
+    WHERE probed_at >= strftime('%Y-%m-%dT%H:%M:%fZ', 'now', '-1 minute') AND success = 0
   `));
 
     const jobBacklog = getCount(queryOne(`

src/services/AnalyticsService.js

@@ -215,12 +215,14 @@ export async function getPopularMints(window = '7d', limit = 20) {
 
 /**
  * Get popular mints from local database (fallback)
+ * When no pageviews exist, falls back to trust score ranking
  */
 function getLocalPopularMints(window = '7d', limit = 20) {
     const since = window === '24h' ? hoursAgo(24) :
         window === '30d' ? daysAgo(30) : daysAgo(7);
 
-    return query(`
+    // First try to get mints with pageviews
+    const mintsWithViews = query(`
         SELECT 
             m.mint_id,
             m.name,
@@ -236,11 +238,37 @@ function getLocalPopularMints(window = '7d', limit = 20) {
         LEFT JOIN current_trust_scores ts ON m.mint_id = ts.mint_id
         WHERE (m.visibility IS NULL OR m.visibility = 'public')
         AND m.status != 'merged'
+        AND m.status IN ('online', 'degraded')
         GROUP BY m.mint_id
         HAVING views > 0
         ORDER BY views DESC
         LIMIT ?
     `, [since, limit]);
+
+    if (mintsWithViews.length >= limit) {
+        return mintsWithViews;
+    }
+
+    // Fallback: return top mints by trust score if not enough pageview data
+    return query(`
+        SELECT 
+            m.mint_id,
+            m.name,
+            m.canonical_url,
+            m.icon_url,
+            m.status,
+            ts.score_total as trust_score,
+            ts.score_level as trust_level,
+            0 as views,
+            0 as unique_sessions
+        FROM mints m
+        LEFT JOIN current_trust_scores ts ON m.mint_id = ts.mint_id
+        WHERE (m.visibility IS NULL OR m.visibility = 'public')
+        AND m.status != 'merged'
+        AND m.status IN ('online', 'degraded')
+        ORDER BY ts.score_total DESC NULLS LAST, m.name ASC
+        LIMIT ?
+    `, [limit]);
 }
 
 // ==========================================

src/services/PageviewService.js

@@ -219,12 +219,14 @@ export async function getTrendingMints(limit = 10, window = '7d') {
 
 /**
  * Get trending mints from local database (fallback)
+ * When no pageviews exist, falls back to recently active mints by trust score
  */
 function getLocalTrendingMints(limit = 10, window = '7d') {
     const since = window === '24h' ? hoursAgo(24) : daysAgo(7);
     const days = window === '24h' ? 1 : 7;
 
-    const mints = query(`
+    // First try to get mints with pageviews
+    const mintsWithViews = query(`
     SELECT 
       m.mint_id,
       m.canonical_url,
@@ -246,12 +248,39 @@ function getLocalTrendingMints(limit = 10, window = '7d') {
     LIMIT ?
   `, [since, limit]);
 
-    // Calculate view velocity
+    if (mintsWithViews.length >= limit) {
-    return mints.map(m => ({
+        return mintsWithViews.map(m => ({
             ...m,
             view_velocity: Math.round((m.view_count / days) * 10) / 10,
             source: 'local',
         }));
+    }
+
+    // Fallback: return top mints by trust score if not enough pageview data
+    const fallbackMints = query(`
+    SELECT 
+      m.mint_id,
+      m.canonical_url,
+      m.name,
+      m.icon_url,
+      m.status,
+      ts.score_total as trust_score,
+      ts.score_level as trust_level,
+      0 as view_count,
+      0 as unique_sessions
+    FROM mints m
+    LEFT JOIN current_trust_scores ts ON m.mint_id = ts.mint_id
+    WHERE m.status IN ('online', 'degraded')
+      AND (m.visibility IS NULL OR m.visibility = 'public')
+    ORDER BY ts.score_total DESC NULLS LAST, m.name ASC
+    LIMIT ?
+  `, [limit]);
+
+    return fallbackMints.map(m => ({
+        ...m,
+        view_velocity: 0,
+        source: 'local',
+    }));
 }
 
 /**

src/services/ReviewService.js

@@ -292,7 +292,7 @@ export function getRecentReviews(limit = 20) {
       m.canonical_url as mint_url
     FROM reviews r
     LEFT JOIN mints m ON r.mint_id = m.mint_id
-    WHERE r.rating IS NOT NULL
+    WHERE r.mint_id IS NOT NULL
     ORDER BY r.created_at DESC
     LIMIT ?
   `, [limit]);
@@ -438,7 +438,7 @@ export function getRecentEcosystemReviews(limit = 20, since = null) {
             r.created_at
         FROM reviews r
         LEFT JOIN mints m ON r.mint_id = m.mint_id
-        WHERE r.rating IS NOT NULL
+        WHERE r.mint_id IS NOT NULL
     `;
     const params = [];
 

src/utils/time.js

@@ -1,7 +1,9 @@
 /**
  * Time Utilities
  * 
- * ISO-8601 UTC timestamps for consistency.
+ * All timestamps are stored as ISO-8601 UTC format: YYYY-MM-DDTHH:MM:SS.sssZ
+ * This matches JavaScript's Date.toISOString() output.
+ * Database defaults use SQLite's strftime('%Y-%m-%dT%H:%M:%fZ', 'now') to match.
  */
 
 /**
@@ -121,4 +123,3 @@ export function bucketStart(timestamp, bucketMs) {
     const ts = new Date(timestamp).getTime();
     return new Date(Math.floor(ts / bucketMs) * bucketMs).toISOString();
 }
-