feat: 添加数据集加载功能，支持选择数据集文件夹并验证meta.json格式

src/lib/types/meta.ts

@@ -34,3 +34,25 @@ export type ImageMeta = {
   sentences: DescribeSentence[];
   selectedSentences: string[];
 }
+
+export function isDatasetMeta(value: unknown): value is DatasetMeta {
+  if (typeof value !== 'object' || value === null) {
+    return false;
+  }
+
+  const candidate = value as Partial<DatasetMeta>;
+
+  return (
+    typeof candidate.name === 'string' &&
+    typeof candidate.targetModel === 'string' &&
+    typeof candidate.loraType === 'string' &&
+    typeof candidate.unifiedImageSize === 'boolean' &&
+    typeof candidate.unifiedImageRatio === 'boolean' &&
+    Array.isArray(candidate.imageSize) &&
+    candidate.imageSize.length === 2 &&
+    typeof candidate.imageSize[0] === 'number' &&
+    typeof candidate.imageSize[1] === 'number' &&
+    Array.isArray(candidate.triggerWords) &&
+    candidate.triggerWords.every((word) => typeof word === 'string')
+  );
+}

src/routes/boot/+page.svelte

@@ -1,12 +1,72 @@
 <script lang="ts">
-import { afterNavigate } from '$app/navigation';
+import { afterNavigate, goto } from '$app/navigation';
 import NewFolder from '$lib/components/icons/NewFolder.svelte';
 import OpenFolder from '$lib/components/icons/OpenFolder.svelte';
+import { openedDatasetDir } from '$lib/stores/dataset';
 import { currentActivate } from '$lib/stores/navigate';
+import { isDatasetMeta } from '$lib/types/meta';
+import { join } from '@tauri-apps/api/path';
+import { message, open } from '@tauri-apps/plugin-dialog';
+import { readDir, readTextFile } from '@tauri-apps/plugin-fs';
 
 afterNavigate(() => {
   currentActivate.set('dataset');
 });
+
+async function loadDataset() {
+  try {
+    const selectResult = await open({
+      directory: true,
+      multiple: false,
+      title: 'Select Dataset Folder',
+    });
+
+    let selectedPath = '';
+    if (Array.isArray(selectResult)) {
+      selectedPath = selectResult[0] ?? '';
+    } else if (typeof selectResult === 'string') {
+      selectedPath = selectResult;
+    } else {
+      return;
+    }
+
+    if (!selectedPath) {
+      return;
+    }
+
+    const entries = await readDir(selectedPath);
+    const hasMetaFile = entries.some((entry) => entry.name === 'meta.json');
+
+    if (!hasMetaFile) {
+      await message('The selected folder does not contain meta.json.', {
+        kind: 'warning',
+        title: 'Invalid Dataset Folder',
+      });
+      return;
+    }
+
+    const metaPath = await join(selectedPath, 'meta.json');
+    const metaText = await readTextFile(metaPath);
+    const parsedMeta: unknown = JSON.parse(metaText);
+
+    if (!isDatasetMeta(parsedMeta)) {
+      await message('meta.json format is invalid and cannot be parsed as DatasetMeta.', {
+        kind: 'warning',
+        title: 'Invalid meta.json',
+      });
+      return;
+    }
+
+    openedDatasetDir.set(selectedPath);
+    await goto('/dataset');
+  } catch (error) {
+    console.error('Failed to load dataset:', error);
+    await message('Failed to load dataset folder.', {
+      kind: 'error',
+      title: 'Load Dataset Failed',
+    });
+  }
+}
 </script>
 
 <main class="flex flex-col justify-center items-center overflow-hidden size-full">
@@ -15,7 +75,7 @@ afterNavigate(() => {
       <NewFolder width="20" />
       New Dataset
     </a>
-    <button class="btn">
+    <button class="btn" onclick={loadDataset}>
       <OpenFolder width="20" />
       Open Dataset
     </button>

src/routes/create/+page.svelte

@@ -66,7 +66,6 @@ async function createDataset() {
       const metaPath = await join(storePath, 'meta.json');
       await writeTextFile(metaPath, JSON.stringify(datasetMeta, null, 2));
 
-      localStorage.setItem('#sym:openedDatasetDir', storePath);
       openedDatasetDir.set(storePath);
 
       await goto('/dataset');