fix(csv): unwrap temporal force-text values

crates/dbx-core/src/table_import.rs

@@ -4016,10 +4016,12 @@ fn has_numeric_leading_zero(value: &str) -> bool {
 }
 
 fn is_likely_date(value: &str) -> bool {
+    let value = crate::temporal_format::strip_csv_force_text_wrapper(value);
     ["%Y-%m-%d", "%Y/%m/%d"].iter().any(|format| NaiveDate::parse_from_str(value, format).is_ok())
 }
 
 fn is_likely_timestamp(value: &str) -> bool {
+    let value = crate::temporal_format::strip_csv_force_text_wrapper(value);
     if DateTime::parse_from_rfc3339(value).is_ok() {
         return true;
     }
@@ -9481,6 +9483,10 @@ mod tests {
         assert_eq!(xlsx_cell_value(&duration_cell), serde_json::json!("60:00:00"));
         assert_eq!(infer_value_type(&date_value), Some(ImportInferredType::Timestamp));
         assert_eq!(infer_value_type(&time_value), Some(ImportInferredType::Decimal));
+        assert_eq!(
+            infer_value_type(&serde_json::json!("=\"2026-06-24 02:00:07\"")),
+            Some(ImportInferredType::Timestamp)
+        );
     }
 
     #[test]

crates/dbx-core/src/temporal_format.rs

@@ -148,6 +148,7 @@ fn parse_epoch_temporal(value: &str) -> Option<NaiveDateTime> {
 }
 
 fn parse_temporal(value: &str, preferred_pattern: Option<&str>) -> Option<ParsedTemporal> {
+    let value = strip_csv_force_text_wrapper(value);
     preferred_pattern
         .filter(|pattern| !pattern.trim().is_empty())
         .and_then(|pattern| parse_with_pattern(value, pattern))
@@ -224,6 +225,10 @@ fn active_temporal_pattern(pattern: Option<&str>) -> Option<&str> {
     pattern.filter(|pattern| !pattern.trim().is_empty())
 }
 
+pub(crate) fn strip_csv_force_text_wrapper(value: &str) -> &str {
+    value.strip_prefix("=\"").and_then(|value| value.strip_suffix('"')).unwrap_or(value)
+}
+
 pub fn format_temporal_export_row_cow<'a>(
     row: &'a [Value],
     column_types: &[Option<String>],
@@ -633,6 +638,15 @@ mod tests {
         );
     }
 
+    #[test]
+    fn import_normalization_unwraps_csv_force_text_temporal_values() {
+        assert_eq!(
+            normalize_temporal_import_value(&json!("=\"2026-06-24 02:00:07\""), Some("DATETIME"), None),
+            json!("2026-06-24 02:00:07")
+        );
+        assert_eq!(normalize_temporal_import_value(&json!("=\"2026-06-24\""), Some("DATE"), None), json!("2026-06-24"));
+    }
+
     #[test]
     fn preserves_raw_export_values_when_pattern_requires_missing_fields() {
         assert_eq!(