test(assert): tighten DEV-throw test with console.error and reporter assertions

Strengthens the existing DEV-mode throw test to also verify the full
DEV failure policy:
- console.error is still emitted alongside the throw
- the registered reporter is NOT called in DEV (DEV throws instead of
  delegating)

Catches regressions in the "throw in DEV, report only in non-DEV"
split.

Addresses review feedback:
https://github.com/Comfy-Org/ComfyUI_frontend/pull/11824#discussion_r3176025478

src/base/assert.test.ts

@@ -30,9 +30,15 @@ describe('assert', () => {
 
   it('throws in DEV mode when condition is false', () => {
     vi.stubEnv('DEV', true)
+    const reporter = vi.fn()
+    setAssertReporter(reporter)
     expect(() => assert(false, 'dev error')).toThrow(
       '[Assertion failed]: dev error'
     )
+    expect(consoleErrorSpy).toHaveBeenCalledWith(
+      '[Assertion failed]: dev error'
+    )
+    expect(reporter).not.toHaveBeenCalled()
   })
 
   it('does not throw in non-DEV mode when condition is false', () => {