fix(hooks): improve image analysis output format

Match websearch transformer format:
- Header: [Image Analysis via CLIProxy]
- Metadata: File name, size in KB, model used
- Separator lines for better readability
- Footer instruction for Claude

lib/hooks/image-analyzer-transformer.cjs

@@ -209,29 +209,35 @@ function analyzeViaCliProxy(base64Data, mediaType, model, timeoutMs) {
 }
 
 /**
- * Format analysis description for Claude
+ * Format analysis description for Claude (matches websearch format)
  */
-function formatDescription(filePath, description, model) {
+function formatDescription(filePath, description, model, fileSize) {
+  const sizeKB = fileSize ? (fileSize / 1024).toFixed(1) : '?';
   return [
-    `## Image Analysis: ${path.basename(filePath)}`,
+    `[Image Analysis via CLIProxy]`,
+    '',
+    `File: ${path.basename(filePath)} (${sizeKB} KB)`,
+    `Model: ${model}`,
+    '',
+    '---',
     '',
     description,
     '',
     '---',
-    `*Analyzed via CLIProxy (${model})*`,
+    '*Use this description to understand the image content.*',
   ].join('\n');
 }
 
 /**
  * Output success response and exit
  */
-function outputSuccess(filePath, description, model) {
+function outputSuccess(filePath, description, model, fileSize) {
-  const formattedDescription = formatDescription(filePath, description, model);
+  const formattedDescription = formatDescription(filePath, description, model, fileSize);
 
   const output = {
     decision: 'block',
     reason: `Image analyzed: ${path.basename(filePath)}`,
-    systemMessage: `[Image Analysis] ${path.basename(filePath)} analyzed via CLIProxy`,
+    systemMessage: `[Image Analysis] ${path.basename(filePath)} analyzed via CLIProxy (${model})`,
     hookSpecificOutput: {
       hookEventName: 'PreToolUse',
       permissionDecision: 'deny',
@@ -378,7 +384,7 @@ async function processHook() {
     const description = await analyzeViaCliProxy(base64Data, mediaType, model, timeoutMs);
 
     // Output success
-    outputSuccess(filePath, description, model);
+    outputSuccess(filePath, description, model, stats.size);
   } catch (err) {
     if (process.env.CCS_DEBUG) {
       console.error('[CCS Hook] Error:', err.message);