feat(output_view): 导出页面重构 - 长图卡片化展示、缩略图增大、预览优化、纯图片页原图保存

- output_view.html: 长图改为固定高度卡片(70px)，Blob URL查看，缩略图minmax(280px,1fr)，
  竖图预览优先填充视口高度，下载功能完整保留
- phone-image.js: renderPureImageToCanvas()使用naturalWidth/naturalHeight保持原图分辨率，
  新增长图生成和保存功能
- Post.php: 新增outputView()方法提供导出页面渲染数据
- PhoneImage.php: 图片数据改为DB存储，新增saveLongImage()方法
- phone_image.html: 添加导出页面入口按钮
- 新增数据库迁移: post_output_file表添加image_data字段

app/common/tools/PhoneImage.php

@@ -70,40 +70,69 @@ class PhoneImage implements PostOutputManagerInterface
      */
     public function savePageImage(int $outputId, int $page, string $imageData)
     {
-        $imageData = str_replace('data:image/jpeg;base64,', '', $imageData);
-        $imageData = str_replace('data:image/png;base64,', '', $imageData);
-        $imageData = str_replace(' ', '+', $imageData);
-        $decoded = base64_decode($imageData);
+        // 保留原始base64用于存储
+        $rawBase64 = str_replace('data:image/jpeg;base64,', '', $imageData);
+        $rawBase64 = str_replace('data:image/png;base64,', '', $rawBase64);
+        $rawBase64 = str_replace(' ', '+', $rawBase64);
+        $decoded = base64_decode($rawBase64);
 
         if ($decoded === false) {
             return false;
         }
 
-        $dateDir = date('Ymd');
-        $relativeDir = '/upload/post_output/' . $dateDir;
-        $fileName = $outputId . '_' . $page . '.jpg';
-        $relativePath = $relativeDir . '/' . $fileName;
-        $fullDir = App::getRootPath() . '/public' . $relativeDir;
-        $fullPath = $fullDir . '/' . $fileName;
-
-        if (!is_dir($fullDir)) {
-            mkdir($fullDir, 0777, true);
-        }
-
-        file_put_contents($fullPath, $decoded);
-
-        $imageInfo = getimagesize($fullPath);
-        $width = $imageInfo[0] ?? 0;
-        $height = $imageInfo[1] ?? 0;
+        $imageInfo = @getimagesizefromstring($decoded);
+        $width = is_array($imageInfo) ? $imageInfo[0] : 0;
+        $height = is_array($imageInfo) ? $imageInfo[1] : 0;
 
         $fileRecord = PostOutputFile::create([
             'output_id' => $outputId,
             'page' => $page,
-            'file_path' => $relativePath,
-            'file_url' => $relativePath,
+            'file_path' => '',
+            'file_url' => '',
             'file_size' => strlen($decoded),
             'width' => $width,
             'height' => $height,
+            'image_data' => $rawBase64,
+        ]);
+
+        return $fileRecord;
+    }
+
+    /**
+     * 保存长图
+     * @param int $outputId 输出记录ID
+     * @param string $imageData base64编码的长图数据
+     * @return PostOutputFile|false
+     */
+    public function saveLongImage(int $outputId, string $imageData)
+    {
+        $rawBase64 = str_replace('data:image/jpeg;base64,', '', $imageData);
+        $rawBase64 = str_replace('data:image/png;base64,', '', $rawBase64);
+        $rawBase64 = str_replace(' ', '+', $rawBase64);
+        $decoded = base64_decode($rawBase64);
+
+        if ($decoded === false) {
+            return false;
+        }
+
+        $imageInfo = @getimagesizefromstring($decoded);
+        $width = is_array($imageInfo) ? $imageInfo[0] : 0;
+        $height = is_array($imageInfo) ? $imageInfo[1] : 0;
+
+        // 先删除该output_id下已有的长图(page=0)
+        PostOutputFile::where('output_id', $outputId)
+            ->where('page', 0)
+            ->delete();
+
+        $fileRecord = PostOutputFile::create([
+            'output_id' => $outputId,
+            'page' => 0,
+            'file_path' => '',
+            'file_url' => '',
+            'file_size' => strlen($decoded),
+            'width' => $width,
+            'height' => $height,
+            'image_data' => $rawBase64,
         ]);
 
         return $fileRecord;
@@ -137,22 +166,42 @@ class PhoneImage implements PostOutputManagerInterface
 
         $zipFileName = 'post_output_' . $outputId . '.zip';
         $zipPath = $tempDir . '/' . $zipFileName;
+        $tempFiles = [];
 
-        $zip = new \ZipArchive();
-        if ($zip->open($zipPath, \ZipArchive::CREATE | \ZipArchive::OVERWRITE) !== true) {
-            throw new \Exception('无法创建ZIP文件');
-        }
+        try {
+            $zip = new \ZipArchive();
+            if ($zip->open($zipPath, \ZipArchive::CREATE | \ZipArchive::OVERWRITE) !== true) {
+                throw new \Exception('无法创建ZIP文件');
+            }
 
-        foreach ($files as $file) {
-            $filePath = App::getRootPath() . '/public' . $file->file_path;
-            if (file_exists($filePath)) {
+            foreach ($files as $file) {
                 $pageName = str_pad((string) $file->page, 2, '0', STR_PAD_LEFT) . '.jpg';
-                $zip->addFile($filePath, $pageName);
+
+                if (!empty($file->image_data)) {
+                    $decoded = base64_decode($file->image_data);
+                    if ($decoded !== false) {
+                        $tempFilePath = $tempDir . '/page_' . $file->page . '_' . $outputId . '.jpg';
+                        file_put_contents($tempFilePath, $decoded);
+                        $tempFiles[] = $tempFilePath;
+                        $zip->addFile($tempFilePath, $pageName);
+                    }
+                } else {
+                    $filePath = App::getRootPath() . '/public' . $file->file_path;
+                    if (file_exists($filePath)) {
+                        $zip->addFile($filePath, $pageName);
+                    }
+                }
+            }
+
+            $zip->close();
+        } finally {
+            foreach ($tempFiles as $tempFile) {
+                if (file_exists($tempFile)) {
+                    @unlink($tempFile);
+                }
             }
         }
 
-        $zip->close();
-
         return $zipPath;
     }