feat(extension): send page URL to import API from context menu

TODO.md

@@ -43,7 +43,7 @@ MVP is functionally complete (core app + docs + tests).
 
 ### Phase 4: Browser Extension (after URL import stable)
 - [x] Scaffold browser extension project (Manifest v3)
-- [ ] Add “Send to Recipe Manager” action to call import API
+- [x] Add “Send to Recipe Manager” action to call import API
 - [ ] Add extension settings for Recipe Manager base URL
 
 ---

browser-extension/background.js

@@ -1,8 +1,46 @@
+const DEFAULT_BASE_URL = 'http://localhost:3000';
+
+function normalizeBaseUrl(rawBaseUrl) {
+  if (typeof rawBaseUrl !== 'string' || rawBaseUrl.trim().length === 0) {
+    return DEFAULT_BASE_URL;
+  }
+
+  return rawBaseUrl.trim().replace(/\/+$/, '');
+}
+
+async function getRecipeManagerBaseUrl() {
+  const { recipeManagerBaseUrl } = await chrome.storage.sync.get({
+    recipeManagerBaseUrl: DEFAULT_BASE_URL,
+  });
+
+  return normalizeBaseUrl(recipeManagerBaseUrl);
+}
+
+async function sendUrlToRecipeManager(pageUrl) {
+  const baseUrl = await getRecipeManagerBaseUrl();
+  const importUrl = `${baseUrl}/api/import/url`;
+
+  const response = await fetch(importUrl, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({ url: pageUrl }),
+  });
+
+  if (!response.ok) {
+    const responseText = await response.text();
+    throw new Error(`Import request failed (${response.status}): ${responseText}`);
+  }
+
+  return response.json();
+}
+
 chrome.runtime.onInstalled.addListener(() => {
   chrome.contextMenus.create({
     id: 'send-to-recipe-manager',
     title: 'Send to Recipe Manager',
-    contexts: ['page']
+    contexts: ['page'],
   });
 });
 
@@ -11,6 +49,17 @@ chrome.contextMenus.onClicked.addListener((info, tab) => {
     return;
   }
 
-  // Placeholder for task: "Add 'Send to Recipe Manager' action to call import API"
-  console.info('[Recipe Manager Extension] Context menu clicked for URL:', tab.url);
+  sendUrlToRecipeManager(tab.url)
+    .then((payload) => {
+      console.info('[Recipe Manager Extension] Import request sent successfully', {
+        sourceUrl: tab.url,
+        success: payload?.success ?? true,
+      });
+    })
+    .catch((error) => {
+      console.error('[Recipe Manager Extension] Failed to import URL', {
+        sourceUrl: tab.url,
+        error: error instanceof Error ? error.message : String(error),
+      });
+    });
 });