fixes in ux

src/db.rs

@@ -204,7 +204,23 @@ pub fn normalize_timestamp(value: &str) -> String {
         return timestamp.with_timezone(&Utc).to_rfc3339();
     }
 
-    for format in ["%Y-%m-%d %H:%M:%S%.f%:z", "%Y-%m-%d %H:%M:%S%.f%#z"] {
+    // PostgreSQL renders TEXT timestamps as e.g. `2026-07-20 14:32:10.123456+00`.
+    // RFC 3339 requires `T` and a colon in the numeric offset.
+    let mut postgres = value.replacen(' ', "T", 1);
+    if postgres.len() >= 3 {
+        let offset_start = postgres.len() - 3;
+        let offset = &postgres[offset_start..];
+        if (offset.starts_with('+') || offset.starts_with('-'))
+            && offset[1..].chars().all(|character| character.is_ascii_digit())
+        {
+            postgres.push_str(":00");
+        }
+    }
+    if let Ok(timestamp) = DateTime::parse_from_rfc3339(&postgres) {
+        return timestamp.with_timezone(&Utc).to_rfc3339();
+    }
+
+    for format in ["%Y-%m-%d %H:%M:%S%.f%:z", "%Y-%m-%dT%H:%M:%S%.f%:z"] {
         if let Ok(timestamp) = DateTime::parse_from_str(value, format) {
             return timestamp.with_timezone(&Utc).to_rfc3339();
         }
@@ -216,6 +232,7 @@ pub fn normalize_timestamp(value: &str) -> String {
         }
     }
 
+    // Existing rows should still be readable even if they were stored without a zone.
     value.to_string()
 }