fix(web): hide verified cold blank sessions

packages/host/apiproxy/tests/session-export.spec.ts

@@ -127,17 +127,32 @@ async function responseBytes(response: Response): Promise<Uint8Array> {
 
 describe('session export compression config', () => {
   it('defaults to level 6 and rejects values outside the integer 0-9 range', () => {
-    expect(ApiProxyService.Config({})).toEqual({ sessionExportCompressionLevel: 6 })
+    expect(ApiProxyService.Config({})).toEqual({
+      sessionExportCompressionLevel: 6,
+      coldBlankProbeMaxBytes: 1024,
+    })
     expect(ApiProxyService.Config({ sessionExportCompressionLevel: 0 }))
-      .toEqual({ sessionExportCompressionLevel: 0 })
+      .toEqual({ sessionExportCompressionLevel: 0, coldBlankProbeMaxBytes: 1024 })
     expect(ApiProxyService.Config({ sessionExportCompressionLevel: 9 }))
-      .toEqual({ sessionExportCompressionLevel: 9 })
+      .toEqual({ sessionExportCompressionLevel: 9, coldBlankProbeMaxBytes: 1024 })
     for (const value of [-1, 10, 1.5]) {
       expect(() => ApiProxyService.Config({ sessionExportCompressionLevel: value } as never)).toThrow()
     }
   })
 })
 
+describe('cold blank probe config', () => {
+  it('accepts a per-Session byte bound including zero and rejects invalid bounds', () => {
+    expect(ApiProxyService.Config({ coldBlankProbeMaxBytes: 0 }))
+      .toEqual({ sessionExportCompressionLevel: 6, coldBlankProbeMaxBytes: 0 })
+    expect(ApiProxyService.Config({ coldBlankProbeMaxBytes: 2048 }))
+      .toEqual({ sessionExportCompressionLevel: 6, coldBlankProbeMaxBytes: 2048 })
+    for (const value of [-1, 1.5]) {
+      expect(() => ApiProxyService.Config({ coldBlankProbeMaxBytes: value })).toThrow()
+    }
+  })
+})
+
 describe('session.export download endpoint', () => {
   it('streams a ZIP with the root artifact verbatim under its original filename', async () => {
     const api = await buildApi({ 'session-root': artifact('session-root') })