Fixed - [install] [app-ini-import] [mailer] Corrected installer app.ini import so imported mailer sender details and Site Title branding fully replace the current form state.

- 1 - I updated `routers/install/install.go`, `routers/install/routes_test.go`, and `templates/install.tmpl` so importing `app.ini` now replaces stale split mailer sender fields with the imported `FROM = site_name <email@example.com>` value and immediately refreshes the derived `Install %s` button label from the imported `APP_NAME`.

.codex-history.md

@@ -854,3 +854,6 @@ History search guidance:
 174 - [2026-05-22 19:36:16] - v1.27.0-dev-185-ga36bddc1c2 - Type: Modified - [badge] [label] [repo] [repo-explore] [visibility-badge] [admin] Refined the repo visibility badges (`Public` / `Privat`) and the small `by ...` labels, and kept long admin badge slugs on a single line.
 - 1 - I updated `web_src/css/modules/label.css` so the repo visibility badges and the small attribution labels such as `by ...` now use a pill-style border radius with tighter horizontal padding, giving both label families a more compact visual treatment.
 - 2 - I updated `templates/admin/badge/list.tmpl` to keep badge slug cells on a single line with `tw-whitespace-nowrap`, preventing awkward wrapping in the admin badge list.
+
+175 - [2026-05-22 20:53:37] - v1.27.0-dev-186-gc498ee9b9c - Type: Fixed - [install] [app-ini-import] [mailer] Corrected installer `app.ini` import so imported mailer sender details and `Site Title` branding fully replace the current form state.
+- 1 - I updated `routers/install/install.go`, `routers/install/routes_test.go`, and `templates/install.tmpl` so importing `app.ini` now replaces stale split mailer sender fields with the imported `FROM = site_name <email@example.com>` value and immediately refreshes the derived `Install %s` button label from the imported `APP_NAME`.

routers/install/install.go

@@ -445,6 +445,14 @@ func populateInstallFormFromConfig(form *forms.InstallForm, cfg setting.ConfigPr
 	form.AppURL = setting.ConfigSectionKeyString(serverSec, "ROOT_URL", form.AppURL)
 	form.LogRootPath = setting.ConfigSectionKeyString(logSec, "ROOT_PATH", form.LogRootPath)
 
+	form.SMTPAddr = ""
+	form.SMTPPort = ""
+	form.SMTPFrom = ""
+	form.SMTPFromName = ""
+	form.SMTPFromAddress = ""
+	form.SMTPUser = ""
+	form.SMTPPasswd = ""
+
 	if setting.ConfigSectionKeyBool(mailerSec, "ENABLED") {
 		form.SMTPAddr = setting.ConfigSectionKeyString(mailerSec, "SMTP_ADDR", form.SMTPAddr)
 		form.SMTPPort = setting.ConfigSectionKeyString(mailerSec, "SMTP_PORT", form.SMTPPort)

routers/install/routes_test.go

@@ -185,6 +185,30 @@ LANGS = de-DE,en-US
 	assert.Equal(t, "super_admin_only", form.AdminManagementPolicy)
 }
 
+func TestPopulateInstallFormFromConfigReplacesSMTPFromSplitFields(t *testing.T) {
+	cfg, err := setting.NewConfigProviderFromData(`
+APP_NAME = gitSafe: for your code
+
+[mailer]
+ENABLED = true
+SMTP_ADDR = smtp.example.com
+SMTP_PORT = 587
+FROM = gitSafe <noreply@example.com>
+`)
+	require.NoError(t, err)
+
+	form, curDBType := newInstallFormFromSettings()
+	form.SMTPFrom = "Legacy <legacy@example.com>"
+	form.SMTPFromName = "Legacy"
+	form.SMTPFromAddress = "legacy@example.com"
+
+	populateInstallFormFromConfig(&form, cfg, curDBType)
+
+	assert.Equal(t, "gitSafe <noreply@example.com>", form.SMTPFrom)
+	assert.Equal(t, "gitSafe", form.SMTPFromName)
+	assert.Equal(t, "noreply@example.com", form.SMTPFromAddress)
+}
+
 func TestPopulateInstallFormFromConfigWithSensitiveSecrets(t *testing.T) {
 	cfg, err := setting.NewConfigProviderFromData(`
 [server]

templates/install.tmpl

@@ -639,25 +639,29 @@
 	const installConfirmButton = installForm?.querySelector('.js-install-confirm-button');
 	if (appNameInput instanceof HTMLInputElement && smtpFromNameInput instanceof HTMLInputElement) {
 		let lastAutoMailerName = smtpFromNameInput.value.trim() || deriveInstallMailerName(appNameInput.value);
-		if (!smtpFromNameInput.value.trim()) {
-			smtpFromNameInput.value = lastAutoMailerName;
-		}
-		if (installConfirmButton instanceof HTMLButtonElement) {
-			installConfirmButton.textContent = installConfirmButton.dataset.installLabelTemplate.replace('__SITE_NAME__', lastAutoMailerName);
-		}
-
-		appNameInput.addEventListener('input', () => {
+		const syncInstallBranding = () => {
+			const siteName = deriveInstallMailerName(appNameInput.value);
 			const currentValue = smtpFromNameInput.value.trim();
-			if (currentValue && currentValue !== lastAutoMailerName) return;
-			lastAutoMailerName = deriveInstallMailerName(appNameInput.value);
-			smtpFromNameInput.value = lastAutoMailerName;
-			if (installConfirmButton instanceof HTMLButtonElement) {
-				installConfirmButton.textContent = installConfirmButton.dataset.installLabelTemplate.replace('__SITE_NAME__', lastAutoMailerName);
+			if (!currentValue || currentValue === lastAutoMailerName) {
+				smtpFromNameInput.value = siteName;
 			}
-		});
+			lastAutoMailerName = siteName;
+			if (installConfirmButton instanceof HTMLButtonElement) {
+				installConfirmButton.textContent = installConfirmButton.dataset.installLabelTemplate.replace('__SITE_NAME__', siteName);
+			}
+		};
+
+		syncInstallBranding();
+		appNameInput.addEventListener('input', syncInstallBranding);
+		appNameInput.addEventListener('change', syncInstallBranding);
 	} else if (appNameInput instanceof HTMLInputElement && installConfirmButton instanceof HTMLButtonElement) {
-		const siteName = deriveInstallMailerName(appNameInput.value);
-		installConfirmButton.textContent = installConfirmButton.dataset.installLabelTemplate.replace('__SITE_NAME__', siteName);
+		const syncInstallButton = () => {
+			const siteName = deriveInstallMailerName(appNameInput.value);
+			installConfirmButton.textContent = installConfirmButton.dataset.installLabelTemplate.replace('__SITE_NAME__', siteName);
+		};
+		syncInstallButton();
+		appNameInput.addEventListener('input', syncInstallButton);
+		appNameInput.addEventListener('change', syncInstallButton);
 	}
 
 	for (const button of document.querySelectorAll('.js-install-test-mail-button')) {