Render Codex web searches as common tools

app/androidApp/src/main/kotlin/com/example/aiapp/ToolInput.kt

@@ -59,6 +59,9 @@ private val SUBJECTS: Map<String, Pair<String, Language?>> =
         "Glob" to ("pattern" to null),
         "Grep" to ("pattern" to null),
         "WebFetch" to ("url" to null),
+        "WebSearch" to ("query" to null),
+        // Persisted transcripts keep the provider vocabulary they were written with.
+        "web_search" to ("query" to null),
     )
 
 /** Fields that are the tool's own prose about itself rather than input to it. */