feat: native image injection for vision-capable models

- Auto-detect and load images referenced in user prompts
- Inject history images at their original message positions
- Fix EXIF orientation - rotate before resizing in resizeToJpeg
- Sandbox security: validate paths, block remote URLs when sandbox enabled
- Prevent duplicate history image injection across turns
- Handle string-based user message content (convert to array)
- Add bounds check for message index in history processing
- Fix regex to properly match relative paths (./  ../)
- Add multi-image support for iMessage attachments
- Pass MAX_IMAGE_BYTES limit to image loading

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/agents/clawdbot-tools.ts

@@ -41,12 +41,15 @@ export function createClawdbotTools(options?: {
   replyToMode?: "off" | "first" | "all";
   /** Mutable ref to track if a reply was sent (for "first" mode). */
   hasRepliedRef?: { value: boolean };
+  /** If true, the model has native vision capability */
+  modelHasVision?: boolean;
 }): AnyAgentTool[] {
   const imageTool = options?.agentDir?.trim()
     ? createImageTool({
         config: options?.config,
         agentDir: options.agentDir,
         sandboxRoot: options?.sandboxRoot,
+        modelHasVision: options?.modelHasVision,
       })
     : null;
   const webSearchTool = createWebSearchTool({