feat: add React UI and AI page sharing tools

Move HTTP page rendering to the React app, fix multi-tool-call message handling, add API docs lookup, web page lookup, and Markdown preview page sharing.

ias-service/build.rs

@@ -5,12 +5,25 @@ fn main() {
     let migrations = Path::new("migrations");
     println!("cargo:rerun-if-changed={}", migrations.display());
 
+    let mut count = 0u64;
     if let Ok(entries) = fs::read_dir(migrations) {
         for entry in entries.flatten() {
             let path = entry.path();
             if path.extension().is_some_and(|extension| extension == "sql") {
                 println!("cargo:rerun-if-changed={}", path.display());
+                // 将文件大小加入计数，确保新增/删除/修改文件都改变输出
+                count = count.wrapping_add(fs::metadata(&path).map(|m| m.len()).unwrap_or(0));
             }
         }
     }
+
+    // 将 migration 摘要写入 OUT_DIR，lib.rs 通过 include! 引用。
+    // 这样 cargo 可以追踪 migration 变更 → lib.rs 重编译 → sqlx::migrate! 重新展开。
+    let out_dir = std::env::var("OUT_DIR").unwrap();
+    let dest = Path::new(&out_dir).join("migration_stamp.rs");
+    fs::write(
+        &dest,
+        format!("// generated by build.rs\npub const MIGRATION_STAMP: u64 = {count};\n"),
+    )
+    .unwrap();
 }