fix(signatures): apply reply signature to replies and forwards

components/email/email-composer.tsx

@@ -653,6 +653,15 @@ export function EmailComposer({
     ? currentIdentity
     : primaryIdentity;
 
+  // The signature store (default/reply/per-identity) takes precedence over the
+  // legacy per-identity html/text signature. `selectedSignature` is resolved in
+  // resolveStoreSignatureId for the current mode (compose → default; reply/
+  // forward → reply), so replies and forwards pick up the reply signature.
+  // Falls back to the legacy identity signature when no store signature is set.
+  const effectiveSignature = selectedSignature
+    ? { htmlSignature: selectedSignature.body, textSignature: selectedSignature.plainText }
+    : signatureIdentity;
+
   // Hold the TipTap editor instance so we can swap the embedded signature
   // when the user switches identity in "above quote" mode without rebuilding
   // the whole body (which would lose user edits to the surrounding draft).
@@ -1883,6 +1892,7 @@ export function EmailComposer({
     // duplicate it.
     const signatureAlreadyInBody =
       shouldEmbedSignatureInNewMail ||
+      (!plainTextMode && !!selectedSignature && mode === 'compose') ||
       ((mode === 'reply' || mode === 'replyAll' || mode === 'forward') &&
         signaturePosition === 'above_quote');
 
@@ -1890,11 +1900,11 @@ export function EmailComposer({
     const buildSignatureHtml = (): string => {
       if (signatureAlreadyInBody) return '';
       const sep = signatureSeparatorEnabled ? `<br><br>-- <br>` : `<br><br>`;
-      if (signatureIdentity?.htmlSignature) {
-        return `${sep}${sanitizeSignatureHtml(signatureIdentity.htmlSignature)}`;
+      if (effectiveSignature?.htmlSignature) {
+        return `${sep}${sanitizeSignatureHtml(effectiveSignature.htmlSignature)}`;
       }
-      if (signatureIdentity?.textSignature) {
-        return `${sep}${signatureIdentity.textSignature.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\n/g, '<br>')}`;
+      if (effectiveSignature?.textSignature) {
+        return `${sep}${effectiveSignature.textSignature.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\n/g, '<br>')}`;
       }
       return '';
     };
@@ -1907,8 +1917,8 @@ export function EmailComposer({
     // In plain text mode, send text/plain only (no HTML body)
     const signatureOpts = { separator: signatureSeparatorEnabled };
     const finalBody = plainTextMode
-      ? (signatureAlreadyInBody ? body : appendPlainTextSignature(body, signatureIdentity, signatureOpts))
-      : (signatureAlreadyInBody ? htmlToPlainText(body) : appendPlainTextSignature(htmlToPlainText(body), signatureIdentity, signatureOpts));
+      ? (signatureAlreadyInBody ? body : appendPlainTextSignature(body, effectiveSignature, signatureOpts))
+      : (signatureAlreadyInBody ? htmlToPlainText(body) : appendPlainTextSignature(htmlToPlainText(body), effectiveSignature, signatureOpts));
 
     const rewritten = plainTextMode ? null : rewriteInlineImages(body);
     const finalHtmlBody = plainTextMode