fix: send unfiltered models over model/list (#11793)

### What
to unblock filtering models in VSCE, change `model/list` app-server
endpoint to send all models + visibility field `showInPicker` so
filtering can be done in VSCE if desired.

### Tests
Updated tests.

codex-rs/app-server-protocol/schema/json/ClientRequest.json

@@ -1128,6 +1128,13 @@
             "null"
           ]
         },
+        "includeHidden": {
+          "description": "When true, include models that are hidden from the default picker list.",
+          "type": [
+            "boolean",
+            "null"
+          ]
+        },
         "limit": {
           "description": "Optional page size; defaults to a reasonable server-side value.",
           "format": "uint32",

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -12611,6 +12611,9 @@
           "displayName": {
             "type": "string"
           },
+          "hidden": {
+            "type": "boolean"
+          },
           "id": {
             "type": "string"
           },
@@ -12651,6 +12654,7 @@
           "defaultReasoningEffort",
           "description",
           "displayName",
+          "hidden",
           "id",
           "isDefault",
           "model",
@@ -12668,6 +12672,13 @@
               "null"
             ]
           },
+          "includeHidden": {
+            "description": "When true, include models that are hidden from the default picker list.",
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
           "limit": {
             "description": "Optional page size; defaults to a reasonable server-side value.",
             "format": "uint32",

codex-rs/app-server-protocol/schema/json/v2/ModelListParams.json

@@ -8,6 +8,13 @@
         "null"
       ]
     },
+    "includeHidden": {
+      "description": "When true, include models that are hidden from the default picker list.",
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
     "limit": {
       "description": "Optional page size; defaults to a reasonable server-side value.",
       "format": "uint32",

codex-rs/app-server-protocol/schema/json/v2/ModelListResponse.json

@@ -31,6 +31,9 @@
         "displayName": {
           "type": "string"
         },
+        "hidden": {
+          "type": "boolean"
+        },
         "id": {
           "type": "string"
         },
@@ -71,6 +74,7 @@
         "defaultReasoningEffort",
         "description",
         "displayName",
+        "hidden",
         "id",
         "isDefault",
         "model",

codex-rs/app-server-protocol/schema/typescript/v2/Model.ts

@@ -5,4 +5,4 @@ import type { InputModality } from "../InputModality";
 import type { ReasoningEffort } from "../ReasoningEffort";
 import type { ReasoningEffortOption } from "./ReasoningEffortOption";
 
-export type Model = { id: string, model: string, upgrade: string | null, displayName: string, description: string, supportedReasoningEfforts: Array<ReasoningEffortOption>, defaultReasoningEffort: ReasoningEffort, inputModalities: Array<InputModality>, supportsPersonality: boolean, isDefault: boolean, };
+export type Model = { id: string, model: string, upgrade: string | null, displayName: string, description: string, hidden: boolean, supportedReasoningEfforts: Array<ReasoningEffortOption>, defaultReasoningEffort: ReasoningEffort, inputModalities: Array<InputModality>, supportsPersonality: boolean, isDefault: boolean, };

codex-rs/app-server-protocol/schema/typescript/v2/ModelListParams.ts

@@ -10,4 +10,8 @@ cursor?: string | null,
 /**
  * Optional page size; defaults to a reasonable server-side value.
  */
-limit?: number | null, };
+limit?: number | null, 
+/**
+ * When true, include models that are hidden from the default picker list.
+ */
+includeHidden?: boolean | null, };