fix(graphql,test): explainInputs parser + textarea assertions for schemas-tab e2e

Two issues surfaced when the new policy-authoring (schemas tab) e2e tests
ran against a live axon-server:

1. axon-graphql/src/dynamic.rs: putSchema(input.explainInputs) entries
   were wrapped in a synthetic { input: <entry> } object before being
   handed to explain_policy_request_from_value. That extractor uses
   input_object(value, "input") only as an error label — the second
   argument is not dereferenced — so the wrapping caused the lookup of
   `operation` to miss and return "operation must be a string".
   Strip the wrap and pass each entry through directly.

2. ui/tests/e2e/policy-authoring.spec.ts: the happy-path test was using
   toContainText against the textarea, but textarea content lives on
   the `value` attribute (toHaveValue), and the patch fixture dry-run
   was missing the patch JSON payload required by explain_patch_policy.
   Switched to financeAgent for the update.allow rule plus a patch JSON
   that crosses the large-invoice threshold so the
   require-approval-large-invoice-update envelope decides
   needs_approval with finance-approver.

Both schemas-tab specs and the new intent-audit-lineage audit-evidence
test pass against axon-cli/serve --no-auth in-memory. Adjacent specs
(mutation-intents, approval-inbox, graphql-policy-console,
mcp-envelope-preview, original policy-authoring) all green: 17/17.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: easel

crates/axon-graphql/src/dynamic.rs

@@ -6693,6 +6693,11 @@ async fn put_schema_resolver<S: StorageAdapter + 'static>(
 }
 
 /// Parse a list of `ExplainPolicyInput` values from `putSchema(input.explainInputs)`.
+///
+/// `ExplainPolicyInput` shares its shape with the active `explainPolicy`
+/// query input — the extractor expects the bare object (its `input_object`
+/// helper just casts to JSON object for an error label, it does not
+/// dereference an outer `input` field).
 fn explain_policy_dry_run_inputs_from_value(
     value: &Value,
 ) -> Result<Vec<ExplainPolicyRequest>, GqlError> {
@@ -6703,20 +6708,10 @@ fn explain_policy_dry_run_inputs_from_value(
     })?;
     entries
         .iter()
-        .map(explain_policy_dry_run_input_from_value)
+        .map(explain_policy_request_from_value)
         .collect()
 }
 
-fn explain_policy_dry_run_input_from_value(
-    value: &Value,
-) -> Result<ExplainPolicyRequest, GqlError> {
-    // ExplainPolicyInput uses the same shape as the active explainPolicy
-    // query; reuse the extractor by wrapping in a synthetic { input: ... }
-    // object so explain_policy_request_from_value's lookup works.
-    let wrapped = json!({ "input": value });
-    explain_policy_request_from_value(&wrapped)
-}
-
 // ── Schema builders ─────────────────────────────────────────────────────────
 
 fn policy_plans_by_collection(

ui/tests/e2e/policy-authoring.spec.ts

@@ -127,8 +127,9 @@ test.describe('Policy authoring (schemas tab)', () => {
 		// Open the Policy view.
 		await page.getByTestId('schema-policy-view-toggle').click();
 		await expect(page.getByTestId('schema-policy-view')).toBeVisible();
-		await expect(page.getByTestId('schema-policy-editor')).toContainText(
-			'finance-and-operators-read-invoices',
+		// Textareas surface their text via `value`, not innerText.
+		await expect(page.getByTestId('schema-policy-editor')).toHaveValue(
+			/finance-and-operators-read-invoices/,
 		);
 
 		// Replace the editor contents with the proposed (tightened) policy.
@@ -144,11 +145,22 @@ test.describe('Policy authoring (schemas tab)', () => {
 			SCN017_ROLES.financeApprover,
 		);
 
-		// Fixture dry-run as the finance approver: a large invoice patch routes
-		// through the `require-approval-large-invoice-update` envelope.
-		await page.getByTestId('schema-policy-fixture-subject').fill(SCN017_SUBJECTS.financeApprover);
+		// Fixture dry-run as the finance agent: a large invoice patch passes
+		// the update.allow rule and then routes through the
+		// require-approval-large-invoice-update envelope, requiring the
+		// finance-approver role.
+		await page.getByTestId('schema-policy-fixture-subject').fill(SCN017_SUBJECTS.financeAgent);
 		await page.getByTestId('schema-policy-fixture-operation').selectOption('patch');
 		await page.getByTestId('schema-policy-fixture-entity').fill(fixture.invoices.large.id);
+		await page
+			.getByTestId('schema-policy-fixture-patch')
+			.fill(
+				JSON.stringify(
+					{ amount_cents: fixture.invoices.large.amountCents + 500_000 },
+					null,
+					2,
+				),
+			);
 		await page.getByTestId('schema-policy-fixture-run').click();
 		await expect(page.getByTestId('schema-policy-fixture-decision')).toContainText(
 			'needs_approval',