fix: address Copilot review round 10 — structural const match, deep-link constants

- selectBranchIndex compares a discriminator structurally: a `const` may be
  an object or array, and deep-link arguments arrive as freshly parsed
  instances that could never be reference-equal to the schema's own.
- New applySchemaConstants, applied by InspectorView AFTER the deep link's
  `appArgs` are spread over the seeded defaults. The form renders a pinned
  field read-only, so a link disagreeing with one would otherwise auto-open an
  App with a hidden value contradicting the shape on screen.

Signed-off-by: cliffhall <cliff@futurescale.com>

clients/web/src/components/views/InspectorView/InspectorView.tsx

@@ -103,7 +103,11 @@ import {
   correlatedFetchStatusById,
   revealableMessageIds,
 } from "../../../utils/correlateTransportErrors";
-import { collectSchemaDefaults, toFormSchema } from "../../../utils/jsonUtils";
+import {
+  applySchemaConstants,
+  collectSchemaDefaults,
+  toFormSchema,
+} from "../../../utils/jsonUtils";
 import { MONITOR_COLUMN_ANIM_MS } from "./monitorColumnAnimation";
 
 const SORT_DEFAULT: SortDirection = "newest-first";
@@ -1040,13 +1044,15 @@ export function InspectorView({
     // than the first, and defaults seeded from the wrong branch would sit in
     // the submitted arguments where the form — showing the branch the args
     // identify — never displays them (#2123).
-    const formValues = {
-      ...collectSchemaDefaults(
-        toFormSchema(target.inputSchema) ?? {},
-        deepLink.appArgs ?? {},
-      ),
+    // …and the schema's constants are re-applied *after* the overlay: a field
+    // the form renders read-only cannot be corrected by the user, so a deep
+    // link disagreeing with one would otherwise auto-open with a hidden value
+    // contradicting the shape on screen.
+    const appFormSchema = toFormSchema(target.inputSchema) ?? {};
+    const formValues = applySchemaConstants(appFormSchema, {
+      ...collectSchemaDefaults(appFormSchema, deepLink.appArgs ?? {}),
       ...deepLink.appArgs,
-    };
+    });
     // Seed the selection directly rather than routing through
     // AppsScreen.handleSelect. This deliberately bypasses handleSelect's
     // no-input-app auto-launch: a deep link must never invoke a tool against