Move seed.sql out of migrations and add SEO structured data

- Relocate seed.sql to scripts/ so wrangler d1 migrations apply
  doesn't treat it as a migration; update package.json, setup.mjs,
  README, and all AGENTS.md references.
- Add src/lib/schema-org.ts builders (LocalBusiness, FAQPage,
  BlogPosting, BreadcrumbList) and emit JSON-LD via Base.astro.
- Add lastmod to sitemap entries.
- Set real site domain, worker route, and D1/KV ids.
- Improve image loading hints and heading semantics across site
  components; switch BlogIndex to client:idle.

docs/superpowers/plans/2026-09-11-structure-ai-deploy.md

@@ -45,7 +45,7 @@ src/pages/admin/content/[kind].astro  用 parseForm
 src/pages/admin/cases.astro           用 parseForm
 src/pages/admin/settings.astro        用 parseForm
 src/pages/admin/index.astro           加入口連結
-migrations/seed.sql             加 AI 設定 + 示範關鍵字
+scripts/seed.sql                加 AI 設定 + 示範關鍵字
 .dev.vars.example               加 AI_API_KEY / TAVILY_API_KEY
 README.md / AGENTS.md 各層       同步文件
 ```
@@ -620,7 +620,7 @@ Expected: PASS。`npm run dev` → 提交一個空標題，見到紅色錯誤字
 
 **Files:**
 - Modify: `src/db/schema.ts`
-- Modify: `migrations/seed.sql`
+- Modify: `scripts/seed.sql`
 - Generate: `migrations/0002_*.sql`（由 drizzle-kit）
 
 - [x] **Step 1: `posts` 加 `focusKeyword`**
@@ -1399,7 +1399,7 @@ async function main() {
   const migrate = await rl.question("而家套用雲端 migration + seed？(y/N)：");
   if (migrate.trim().toLowerCase() === "y") {
     execSync(`npx wrangler d1 migrations apply ${DB_NAME} --remote`, { stdio: "inherit" });
-    execSync(`npx wrangler d1 execute ${DB_NAME} --remote --file=./migrations/seed.sql`, { stdio: "inherit" });
+    execSync(`npx wrangler d1 execute ${DB_NAME} --remote --file=./scripts/seed.sql`, { stdio: "inherit" });
   }
 
   console.log("\n提示：上線前記得改 astro.config.mjs 嘅 site 做真域名。");

docs/superpowers/specs/2026-09-12-ai-blog-template-deepseek-design.md

@@ -97,7 +97,7 @@ DeepSeek 思考模式**預設開啟**（effort `high`），會令：`temperature
 |---|---|
 | `src/lib/ai.ts` | 通用化 `buildSystemPrompt`；預設 baseUrl/model 改 DeepSeek；`callChat` 加 conditional thinking disabled、`max_tokens: 4000` |
 | `src/schemas/ai.ts` | `ai_base_url` / `ai_chat_model` 預設值同步 |
-| `migrations/seed.sql` | `ai_base_url` / `ai_chat_model` 改預設；`ai_business_context` 改通用格式範本 |
+| `scripts/seed.sql` | `ai_base_url` / `ai_chat_model` 改預設；`ai_business_context` 改通用格式範本 |
 | `src/pages/admin/ai.astro` | 模型／URL 預設值同步；公司背景＋寫作風格加 placeholder／格式說明 |
 | `src/lib/AGENTS.md`、根 `AGENTS.md` | 更新 AI Blog 合約描述（DeepSeek 預設、通用提示詞） |