fix(ui): exclude cellText from mag transform

cellText covers phone numbers, serial numbers, model numbers, and other
identifiers that happen to look numeric. Previously magFormat would
attempt to parse them and convert e.g. "5551234567" into magnitude
notation. Now only cellMoney and cellDrilldown are transformed.

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

Author: cpcloud

internal/app/mag.go

@@ -24,11 +24,12 @@ func magFormat(c cell, includeUnit bool) string {
 	}
 
 	// Only transform kinds that carry meaningful numeric data.
-	// Skip cellReadonly (IDs, ages, counts) and non-numeric kinds.
+	// cellText is excluded because it covers phone numbers, serial numbers,
+	// model numbers, and other identifiers that happen to look numeric.
 	switch c.Kind {
-	case cellText, cellMoney, cellDrilldown:
-		// Potentially numeric; continue to parsing below.
-	case cellReadonly, cellDate, cellWarranty, cellUrgency, cellNotes, cellStatus:
+	case cellMoney, cellDrilldown:
+		// Definitely numeric; continue to parsing below.
+	default:
 		return value
 	}
 

internal/app/mag_test.go

@@ -79,21 +79,30 @@ func TestMagFormatSkipsReadonly(t *testing.T) {
 	assert.Equal(t, "42", magFormat(c, false))
 }
 
-func TestMagFormatSkipsNonNumeric(t *testing.T) {
+func TestMagFormatSkipsNonNumericKinds(t *testing.T) {
 	tests := []struct {
 		name  string
 		value string
 		kind  cellKind
 	}{
-		{"text", "Kitchen Remodel", cellText},
+		{"text name", "Kitchen Remodel", cellText},
 		{"status", "underway", cellStatus},
 		{"date", "2026-02-12", cellDate},
 		{"warranty date", "2027-06-15", cellWarranty},
 		{"urgency date", "2026-03-01", cellUrgency},
 		{"notes", "Some long note", cellNotes},
-		{"empty", "", cellText},
-		{"dash", "\u2014", cellMoney},
+		{"empty text", "", cellText},
+		{"dash money", "\u2014", cellMoney},
 		{"readonly id", "7", cellReadonly},
+
+		// Numeric-looking cellText values that must NOT be transformed:
+		// phone numbers, serial numbers, model numbers, zip codes.
+		{"phone number", "5551234567", cellText},
+		{"formatted phone", "(555) 123-4567", cellText},
+		{"serial number", "123456789", cellText},
+		{"model number", "12345", cellText},
+		{"zip code", "90210", cellText},
+		{"interval", "3m", cellText},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {