feat: add image model config + tool

src/config/schema.ts

@@ -88,7 +88,9 @@ const FIELD_LABELS: Record<string, string> = {
   "gateway.reload.debounceMs": "Config Reload Debounce (ms)",
   "agent.workspace": "Workspace",
   "agent.model": "Default Model",
+  "agent.imageModel": "Image Model",
   "agent.modelFallbacks": "Model Fallbacks",
+  "agent.imageModelFallbacks": "Image Model Fallbacks",
   "ui.seamColor": "Accent Color",
   "browser.controlUrl": "Browser Control URL",
   "session.agentToAgent.maxPingPongTurns": "Agent-to-Agent Ping-Pong Turns",
@@ -114,6 +116,10 @@ const FIELD_HELP: Record<string, string> = {
     "Debounce window (ms) before applying config changes.",
   "agent.modelFallbacks":
     "Ordered fallback models (provider/model). Used when the primary model fails.",
+  "agent.imageModel":
+    "Optional image-capable model (provider/model) used by the image tool.",
+  "agent.imageModelFallbacks":
+    "Ordered fallback image models (provider/model) used by the image tool.",
   "session.agentToAgent.maxPingPongTurns":
     "Max reply-back turns between requester and target (0–5).",
 };

src/config/types.ts

@@ -660,6 +660,8 @@ export type ClawdbotConfig = {
   agent?: {
     /** Model id (provider/model), e.g. "anthropic/claude-opus-4-5". */
     model?: string;
+    /** Optional image-capable model (provider/model) used by the image tool. */
+    imageModel?: string;
     /** Agent working directory (preferred). Used as the default cwd for agent runs. */
     workspace?: string;
     /** Optional allowlist for /model (provider/model or model-only). */
@@ -668,6 +670,8 @@ export type ClawdbotConfig = {
     modelAliases?: Record<string, string>;
     /** Ordered fallback models (provider/model). */
     modelFallbacks?: string[];
+    /** Ordered fallback image models (provider/model) for the image tool. */
+    imageModelFallbacks?: string[];
     /** Optional display-only context window override (used for % in status UIs). */
     contextTokens?: number;
     /** Default thinking level when no /think directive is present. */

src/config/zod-schema.ts

@@ -363,10 +363,12 @@ export const ClawdbotSchema = z.object({
   agent: z
     .object({
       model: z.string().optional(),
+      imageModel: z.string().optional(),
       workspace: z.string().optional(),
       allowedModels: z.array(z.string()).optional(),
       modelAliases: z.record(z.string(), z.string()).optional(),
       modelFallbacks: z.array(z.string()).optional(),
+      imageModelFallbacks: z.array(z.string()).optional(),
       contextTokens: z.number().int().positive().optional(),
       thinkingDefault: z
         .union([