feat(options,popup,background): add per-page aria2 dir option and popup toggle

- Options: add default toggle and base path ()
- Popup: allow per-send enable + preview; passes AGENTS.md  LICENSE	  node_modules	package-lock.json  releases  src
dist	   manifest.json  package.json	README.md	   scripts to aria2
- Background: quick actions honor default, set AGENTS.md  LICENSE	  node_modules	package-lock.json  releases  src
dist	   manifest.json  package.json	README.md	   scripts to <base>/<identifier>
- Storage: new prefs  and

src/background/index.js

@@ -74,6 +74,8 @@ async function getPrefs() {
   return {
     defaultAction: prefs?.defaultAction || 'download',
     allIncludeMeta: !!prefs?.allIncludeMeta,
+    perPageDirEnabled: !!prefs?.perPageDirEnabled,
+    perPageDirBase: prefs?.perPageDirBase || '/aria2/data',
   };
 }
 
@@ -108,7 +110,7 @@ async function rebuildContextSubmenu(tab) {
   let items = [];
   try { items = await collectFromTab(tab.id); } catch (_) { items = []; }
   const identifier = parseIdentifierFromUrl(tab.url || '');
-  const { defaultAction, allIncludeMeta } = await getPrefs();
+  const { defaultAction, allIncludeMeta, perPageDirEnabled, perPageDirBase } = await getPrefs();
   const verb = defaultAction === 'copy' ? 'Copy' : 'Download';
 
   const top = computeTopTypes(items, identifier, 4);
@@ -256,7 +258,7 @@ browser.contextMenus.onClicked.addListener(async (info, tab) => {
   const action = dynamicActions.get(String(info.menuItemId));
   if (!action || !tab?.id) return;
   try {
-    const { defaultAction, allIncludeMeta } = await getPrefs();
+    const { defaultAction, allIncludeMeta, perPageDirEnabled, perPageDirBase } = await getPrefs();
     const identifier = parseIdentifierFromUrl(tab.url || '');
     const items = await collectFromTab(tab.id);
     let selected = items || [];
@@ -279,7 +281,16 @@ browser.contextMenus.onClicked.addListener(async (info, tab) => {
   } else {
       const { endpoint, secret } = await getAria2();
       if (!endpoint) { console.warn('aria2 endpoint not set'); return; }
-      try { await globalThis.addUrisBatch({ endpoint, secret, uris }); } catch (e) { console.warn('aria2 send failed', e); }
+      // Build aria2 options (dir) based on prefs
+      let options = {};
+      try {
+        if (perPageDirEnabled && perPageDirBase) {
+          const base = String(perPageDirBase).replace(/\/+$/, '');
+          const dir = identifier ? `${base}/${identifier}` : base;
+          if (dir) options.dir = dir;
+        }
+      } catch (_) { /* noop */ }
+      try { await globalThis.addUrisBatch({ endpoint, secret, uris, options }); } catch (e) { console.warn('aria2 send failed', e); }
       await setBadgeForTab(tab.id, {
         text: String(count),
         color: '#3b82f6',

src/options/index.html

@@ -41,6 +41,12 @@
         <div class="row">
           <label class="chk"><input type="checkbox" id="include-meta" /> Include metadata in “All”</label>
         </div>
+        <div class="row">
+          <label class="chk"><input type="checkbox" id="per-page-dir-enabled" /> Use per‑page download directory by default</label>
+        </div>
+        <div class="row">
+          <label>Base directory <input id="per-page-dir-base" placeholder="/aria2/data" /></label>
+        </div>
       </section>
     </main>
     <script type="module" src="index.js"></script>

src/options/index.js

@@ -5,6 +5,8 @@ const els = {
   secret: document.getElementById('rpc-secret'),
   defaultAction: document.getElementById('default-action'),
   includeMeta: document.getElementById('include-meta'),
+  perPageDirEnabled: document.getElementById('per-page-dir-enabled'),
+  perPageDirBase: document.getElementById('per-page-dir-base'),
   btnSave: document.getElementById('btn-save'),
   btnReset: document.getElementById('btn-reset'),
   btnTest: document.getElementById('btn-test'),
@@ -19,8 +21,12 @@ async function restore() {
   const { prefs } = await browser.storage.local.get('prefs');
   const defaultAction = prefs?.defaultAction || 'download';
   const includeMeta = !!prefs?.allIncludeMeta;
+  const perPageDirEnabled = !!prefs?.perPageDirEnabled;
+  const perPageDirBase = prefs?.perPageDirBase || '/aria2/data';
   els.defaultAction.value = defaultAction;
   els.includeMeta.checked = includeMeta;
+  els.perPageDirEnabled.checked = perPageDirEnabled;
+  els.perPageDirBase.value = perPageDirBase;
 }
 
 async function save() {
@@ -28,9 +34,11 @@ async function save() {
   const secret = els.secret.value.trim();
   const defaultAction = els.defaultAction.value;
   const allIncludeMeta = !!els.includeMeta.checked;
+  const perPageDirEnabled = !!els.perPageDirEnabled.checked;
+  const perPageDirBase = els.perPageDirBase.value.trim() || '/aria2/data';
   await browser.storage.local.set({
     aria2: { endpoint, secret },
-    prefs: { defaultAction, allIncludeMeta }
+    prefs: { defaultAction, allIncludeMeta, perPageDirEnabled, perPageDirBase }
   });
   els.status.textContent = 'Saved.';
 }

src/popup/index.html

@@ -49,6 +49,12 @@
       <div class="row">
         <label>Secret <input id="rpc-secret" type="password" placeholder="your-token" /></label>
       </div>
+      <div class="row">
+        <label class="chk"><input type="checkbox" id="use-perpage-dir" /> Use per‑page download directory</label>
+      </div>
+      <div class="row">
+        <small id="dir-preview"></small>
+      </div>
       <div class="row actions">
         <button id="btn-copy">Copy Links</button>
         <button id="btn-send">Send to aria2</button>

src/popup/index.js

@@ -15,6 +15,8 @@ const els = {
   btnSend: document.getElementById('btn-send'),
   rpcEndpoint: document.getElementById('rpc-endpoint'),
   rpcSecret: document.getElementById('rpc-secret'),
+  usePerPageDir: document.getElementById('use-perpage-dir'),
+  dirPreview: document.getElementById('dir-preview'),
   count: document.getElementById('count'),
   status: document.getElementById('status'),
   openOptions: document.getElementById('open-options'),
@@ -42,6 +44,21 @@ async function getActiveTabId() {
   return tabs[0]?.id;
 }
 
+function parseIdentifierFromUrl(url) {
+  try {
+    const u = new URL(url);
+    const parts = u.pathname.split('/').filter(Boolean);
+    const idx = parts.indexOf('download');
+    if (idx >= 0 && parts[idx + 1]) return parts[idx + 1];
+  } catch (_) {}
+  return '';
+}
+
+async function getActiveTabUrl() {
+  const tabs = await browser.tabs.query({ active: true, currentWindow: true });
+  return tabs[0]?.url || '';
+}
+
 async function refresh() {
   els.status.textContent = '';
   try {
@@ -58,6 +75,7 @@ async function refresh() {
     }
     allItems = items || [];
     await updateCount();
+    await updateDirPreview();
   } catch (e) {
     els.status.textContent = String(e?.message || e);
   }
@@ -95,10 +113,21 @@ async function sendToAria2() {
   // Persist settings
   await browser.storage.local.set({ aria2: { endpoint, secret } });
   els.status.textContent = 'Sending to aria2…';
-
+  // aria2 options
+  let options = {};
+  try {
+    if (els.usePerPageDir?.checked) {
+      const { prefs } = await browser.storage.local.get('prefs');
+      const base = (prefs?.perPageDirBase || '/aria2/data').replace(/\/+$/, '');
+      const url = await getActiveTabUrl();
+      const id = parseIdentifierFromUrl(url);
+      const dir = id ? `${base}/${id}` : base;
+      if (dir) options.dir = dir;
+    }
+  } catch (_) {}
   const res = await browser.runtime.sendMessage({
     type: 'aria2.send',
-    payload: { endpoint, secret, uris }
+    payload: { endpoint, secret, uris, options }
   });
   if (res?.ok) {
     els.status.textContent = `Sent ${uris.length} link(s) to aria2.`;
@@ -115,6 +144,11 @@ async function restoreSettings() {
   } else {
     els.rpcEndpoint.value = 'http://localhost:6800/jsonrpc';
   }
+  try {
+    const { prefs } = await browser.storage.local.get('prefs');
+    const enabled = !!prefs?.perPageDirEnabled;
+    els.usePerPageDir.checked = enabled;
+  } catch (_) {}
 }
 
 function wire() {
@@ -126,6 +160,9 @@ function wire() {
     els.fType, els.fTypeRe, els.fName, els.fNameRe, els.fSizeMin, els.fSizeMax,
     els.fDateFrom, els.fDateTo, els.fCase
   ].forEach(el => el.addEventListener('input', () => { updateCount(); }));
+  if (els.usePerPageDir) {
+    els.usePerPageDir.addEventListener('change', () => { updateDirPreview(); });
+  }
 }
 
 document.addEventListener('DOMContentLoaded', async () => {
@@ -150,3 +187,17 @@ function renderPreview() {
     els.preview.appendChild(li);
   }
 }
+
+async function updateDirPreview() {
+  if (!els.dirPreview) return;
+  try {
+    const { prefs } = await browser.storage.local.get('prefs');
+    const base = (prefs?.perPageDirBase || '/aria2/data').replace(/\/+$/, '');
+    const url = await getActiveTabUrl();
+    const id = parseIdentifierFromUrl(url);
+    const dir = id ? `${base}/${id}` : base;
+    els.dirPreview.textContent = els.usePerPageDir?.checked ? `Will set aria2 dir: ${dir}` : '';
+  } catch (_) {
+    els.dirPreview.textContent = '';
+  }
+}