fix: harden Gmail hook model defaults (#472) (thanks @koala73)

src/config/types.ts

@@ -265,6 +265,10 @@ export type HooksGmailConfig = {
     mode?: HooksGmailTailscaleMode;
     path?: string;
   };
+  /** Optional model override for Gmail hook processing (provider/model or alias). */
+  model?: string;
+  /** Optional thinking level override for Gmail hook processing. */
+  thinking?: "off" | "minimal" | "low" | "medium" | "high";
 };
 
 export type HooksConfig = {

src/config/zod-schema.ts

@@ -911,6 +911,16 @@ const HooksGmailSchema = z
         path: z.string().optional(),
       })
       .optional(),
+    model: z.string().optional(),
+    thinking: z
+      .union([
+        z.literal("off"),
+        z.literal("minimal"),
+        z.literal("low"),
+        z.literal("medium"),
+        z.literal("high"),
+      ])
+      .optional(),
   })
   .optional();