fix(table): treat a blank table_v2 filter/order editor field as absent

Clearing the Filter or Order field in Editor mode is the ordinary way to say
'no filter'. `JSON.parse('')` throws, so it surfaced at run time as
`Invalid JSON in Filter: Unexpected end of JSON input` plus a quoting hint
that has nothing to do with the actual problem.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011M563cbFy2S74GvSDf2C3R

Author: TheodoreSpeaks

apps/sim/blocks/blocks/table_v2.test.ts

@@ -91,3 +91,29 @@ describe('table_v2 bulk transformers', () => {
     expect(out.filter).toEqual({ all: [{ field: 'name', op: 'eq', value: 'x' }] })
   })
 })
+
+/**
+ * The Filter/Order fields are canonical pairs: a builder array in Builder mode,
+ * a JSON string in Editor mode. Clearing the editor field is the ordinary way to
+ * say "no filter" — it must not surface as a JSON parse error at run time.
+ */
+describe('table_v2 blank and malformed editor inputs', () => {
+  const base = { operation: 'query_rows', tableId: 'tbl_1', limit: '10' }
+
+  it('treats a blank / whitespace filter or order as absent', () => {
+    for (const value of ['', '   ', '\n']) {
+      expect(params({ ...base, filterInput: value }).filter).toBeUndefined()
+      expect(params({ ...base, sortInput: value }).order).toBeUndefined()
+    }
+  })
+
+  it('treats an empty builder array as absent', () => {
+    expect(params({ ...base, filterInput: [] }).filter).toBeUndefined()
+    expect(params({ ...base, sortInput: [] }).order).toBeUndefined()
+  })
+
+  it('still reports genuinely malformed JSON', () => {
+    expect(() => params({ ...base, filterInput: '{not json}' })).toThrow(/Invalid JSON in Filter/)
+    expect(() => params({ ...base, sortInput: '{not json}' })).toThrow(/Invalid JSON in Sort/)
+  })
+})

apps/sim/blocks/blocks/table_v2.ts

@@ -18,6 +18,9 @@ import { getTrigger } from '@/triggers'
 
 function parseJSON(value: string | unknown, fieldName: string): unknown {
   if (typeof value !== 'string') return value
+  // A blank editor field means "no filter/order", not malformed JSON. Without
+  // this, clearing the field throws `Unexpected end of JSON input` at run time.
+  if (value.trim() === '') return undefined
   try {
     return JSON.parse(value)
   } catch (error) {