fix(model): strip clonotypeAxisId to AxisId shape

The output was returning the raw `AxisSpec` (with `annotations` and
other fields). `PlAgDataTableV2` does

  isJsonEqual(colDef.context.id, props.showCellButtonForAxisId)

inside `cellRendererSelector`, and the table-side `colDef.context.id`
is run through `getAxisId` first — so it only carries
`{ type, name, domain?, contextDomain? }`. The deep-equal silently
returned false against our richer object, and the open button never
rendered on the clonotype-axis cell. No console error, no overlay —
just a row with no button.

Switch to `getAxisId(found)` from `@platforma-sdk/model` so the
returned axis matches the table-side shape byte-for-byte. The
3D-Structure-Prediction block does the same trim manually at
`ui/src/pages/MainPage.vue:248` and that's where the working pattern
came from.

Author: xnacly

model/src/index.ts

@@ -14,6 +14,7 @@ import {
   createPlDataTableStateV2,
   createPlDataTableV2,
   DataModelBuilder,
+  getAxisId,
   parseResourceMap,
 } from "@platforma-sdk/model";
 
@@ -581,14 +582,16 @@ export const platforma = BlockModelV3.create(dataModel)
     if (!ref) return undefined;
     const pdbSpec = ctx.resultPool.getPColumnSpecByRef(ref);
     if (!pdbSpec) return undefined;
-    const spec = pdbSpec as unknown as { axesSpec: AxisId[] };
     // The upstream PDB column carries [sampleId, scClonotypeKey] — match
     // the clonotype axis by name rather than index, since `[0]` is
     // sampleId here and the cell button must hang off the clonotype axis.
-    const found = spec.axesSpec.find(
-      (a) => (a as unknown as { name: string }).name === "pl7.app/vdj/scClonotypeKey",
-    );
-    return found;
+    const found = pdbSpec.axesSpec.find((a) => a.name === "pl7.app/vdj/scClonotypeKey");
+    if (!found) return undefined;
+    // Return a stripped AxisId — `PlAgDataTableV2` does an `isJsonEqual`
+    // against its own column's axisId (run through `getAxisId`, dropping
+    // `annotations` etc). Returning the raw `AxisSpec` with extra fields
+    // silently breaks the deep-equal check → no open button renders.
+    return getAxisId(found);
   })
   .sections(() => [
     { type: "link", href: "/", label: "Main" },