fix: memory-variable GET prefills from its stored value again

CHANGELOG.md

@@ -51,6 +51,17 @@ Versions follow [Semantic Versioning](https://semver.org/) — minor bump per su
   BROWSE/REPLACE enforcement, field-bound forms, two demo apps, and the GUI wizards all now
   agree on one constraint, declared once, on the column.
 
+### Fixed
+- A memory-variable `@ SAY GET` no longer shows blank when the variable already holds a
+  value. Field-binding (#59) rewrote the non-field fallback path to hardcode an empty
+  prefill instead of reading the variable's current value, silently breaking every demo
+  form that pre-fills a default via `STORE`: `overtime.prg`'s Week Monday date (Open/Prep
+  Week, Recalculate Week) and leave date (Register Leave Taken), `INVENTORY.prg`'s stock/
+  reorder/price/quantity defaults (Add Product, Stock In, Stock Out), and `crm.prg`'s deal
+  value default (Add Deal). Found by exercising the running app, not by the test suite —
+  every existing test for this path used a variable with no prior value, where an empty
+  prefill happens to be correct either way.
+
 ## [1.2.0] — 2026-07-09 — TIME columns, WEEK()/DATEADD(), BROWSE cell validation, Overtime demo
 
 ### Added

src/interpreter/Executor.ts

@@ -588,7 +588,10 @@ export class Executor implements IndexCommandsHost {
         return { output: out };
       }
     }
-    this.pendingForm.push({ row, col, label: text, varName, target: { kind: 'var' }, value: '' });
+    this.pendingForm.push({
+      row, col, label: text, varName, target: { kind: 'var' },
+      value: String(this.vars.get(varName) ?? ''),
+    });
     return { output: out };
   }
 

tests/FormFieldBinding.test.ts

@@ -77,6 +77,16 @@ describe('field-bound @ SAY GET', () => {
     expect(form.fields[0].value).toBe('');
   });
 
+  it('a variable GET prefills from the variable\'s current value, not blank', async () => {
+    const { session, sent, run } = await setup();
+    await run('APPEND RECORD');
+    await run('STORE "2026-07-06" TO M_WEEK');
+    await runBlock(session, sent, '@ 4, 5 SAY "Week: " GET M_WEEK\nREAD');
+    const form = sent.find(m => m.type === 'form-open') as any;
+    expect(form.fields[0].target.kind).toBe('var');
+    expect(form.fields[0].value).toBe('2026-07-06');
+  });
+
   it('is a variable GET when no table is in use', async () => {
     const sent: ServerMessage[] = [];
     const session = new Session((m) => sent.push(m));