feat(ui): add network approval persistence plumbing (#12358)

## Summary
- add TUI approval options for persistent network host rules
- add app-server v2 approval payload plumbing for network approval
context + proposed network policy amendments
- add app-server handling to translate `applyNetworkPolicyAmendment`
decisions back into core review decisions
- update docs/test client output and generated app-server schemas/types

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

@@ -313,7 +313,7 @@
               "type": "null"
             }
           ],
-          "description": "Optional context for managed-network approval prompts."
+          "description": "Optional context for a managed-network approval prompt."
         },
         "proposedExecpolicyAmendment": {
           "description": "Optional proposed execpolicy amendment to allow similar commands without prompting.",
@@ -325,6 +325,16 @@
             "null"
           ]
         },
+        "proposedNetworkPolicyAmendments": {
+          "description": "Optional proposed network policy amendments (allow/deny host) for future requests.",
+          "items": {
+            "$ref": "#/definitions/NetworkPolicyAmendment"
+          },
+          "type": [
+            "array",
+            "null"
+          ]
+        },
         "reason": {
           "description": "Optional explanatory reason (e.g. request for network access).",
           "type": [
@@ -568,6 +578,28 @@
       ],
       "type": "string"
     },
+    "NetworkPolicyAmendment": {
+      "properties": {
+        "action": {
+          "$ref": "#/definitions/NetworkPolicyRuleAction"
+        },
+        "host": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "action",
+        "host"
+      ],
+      "type": "object"
+    },
+    "NetworkPolicyRuleAction": {
+      "enum": [
+        "allow",
+        "deny"
+      ],
+      "type": "string"
+    },
     "ParsedCommand": {
       "oneOf": [
         {