binary & fk widgets: don't emit on mount

BinaryEditComponent.ngOnInit re-emitted the stored value after a
parseBinaryValue → bytesToHex → toBufferJson round-trip. When the server
returned the column as a string (or any non-Buffer-JSON shape) the emit
silently differed from what was in tableRowValues, tainting the row-edit
touched-fields set and causing the column to be rewritten on every save.
ForeignKeyEditComponent.ngOnInit had the same pattern with
currentFieldValue. Widgets now emit only on actual user input.

Author: gugu

frontend/src/app/components/ui-components/record-edit-fields/binary/binary.component.spec.ts

@@ -21,35 +21,29 @@ describe('BinaryEditComponent', () => {
 		expect(component).toBeTruthy();
 	});
 
-	it('parses a server string as char-code-per-byte and emits Buffer-JSON on init', () => {
+	it('parses a server string as char-code-per-byte on init and does not emit', () => {
 		vi.spyOn(component.onFieldChange, 'emit');
 		fixture.componentRef.setInput('value', 'Hello');
 		component.ngOnInit();
 		// 'Hello' -> bytes 48 65 6c 6c 6f -> hex '48656c6c6f'
 		expect(component.hexData).toBe('48656c6c6f');
-		expect(component.onFieldChange.emit).toHaveBeenCalledWith({
-			type: 'Buffer',
-			data: [0x48, 0x65, 0x6c, 0x6c, 0x6f],
-		});
+		expect(component.onFieldChange.emit).not.toHaveBeenCalled();
 	});
 
-	it('re-emits an incoming Buffer-JSON value as Buffer-JSON on init', () => {
+	it('parses an incoming Buffer-JSON value into hex on init without emitting', () => {
 		vi.spyOn(component.onFieldChange, 'emit');
 		fixture.componentRef.setInput('value', { type: 'Buffer', data: [0x48, 0x65, 0x6c] });
 		component.ngOnInit();
 		expect(component.hexData).toBe('48656c');
-		expect(component.onFieldChange.emit).toHaveBeenCalledWith({
-			type: 'Buffer',
-			data: [0x48, 0x65, 0x6c],
-		});
+		expect(component.onFieldChange.emit).not.toHaveBeenCalled();
 	});
 
-	it('emits null and shows empty hex when incoming value is null', () => {
+	it('shows empty hex when incoming value is null and does not emit on init', () => {
 		vi.spyOn(component.onFieldChange, 'emit');
 		fixture.componentRef.setInput('value', null);
 		component.ngOnInit();
 		expect(component.hexData).toBe('');
-		expect(component.onFieldChange.emit).toHaveBeenCalledWith(null);
+		expect(component.onFieldChange.emit).not.toHaveBeenCalled();
 	});
 
 	it('emits Buffer-JSON when the user types valid hex', () => {

frontend/src/app/components/ui-components/record-edit-fields/binary/binary.component.ts

@@ -24,7 +24,6 @@ export class BinaryEditComponent extends BaseEditFieldComponent implements OnIni
 	ngOnInit(): void {
 		super.ngOnInit();
 		this.hexData = bytesToHex(parseBinaryValue(this.value()));
-		this.emitCurrentValue();
 	}
 
 	onHexChange(): void {

frontend/src/app/components/ui-components/record-edit-fields/foreign-key/foreign-key.component.ts

@@ -117,7 +117,6 @@ export class ForeignKeyEditComponent extends BaseEditFieldComponent {
 								[primaeyKey.column_name]: res.rows[0][primaeyKey.column_name],
 							})),
 						);
-						this.onFieldChange.emit(this.currentFieldValue);
 					}
 				}