add opt-in SMTP click tracking disable for email links (#8665)

* feat: add opt-in SMTP click tracking disable for email links

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: update ee-repo-ref.txt for email clicktracking branch

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: update ee-repo-ref.txt after simplification

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: exclude trailing commas from URL regex in clicktracking

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: update ee-repo-ref to 57dd88faa3b0b354f813385cf3f6a34eca54a4a1

This commit updates the EE repository reference after PR #504 was merged in windmill-ee-private.

Previous ee-repo-ref: 5cf901db7fb0ea169b09564372e444f28e23ac3a

New ee-repo-ref: 57dd88faa3b0b354f813385cf3f6a34eca54a4a1

Automated by sync-ee-ref workflow.

* chore: update ee-repo-ref.txt to include dedicated worker fixes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: windmill-internal-app[bot] <windmill-internal-app[bot]@users.noreply.github.com>

backend/Cargo.lock

@@ -12118,6 +12118,15 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ece8e78b2f38ec51c51f5d475df0a7187ba5111b2a28bdc761ee05b075d40a71"
 
+[[package]]
+name = "scc"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46e6f046b7fef48e2660c57ed794263155d713de679057f2d0c169bfc6e756cc"
+dependencies = [
+ "sdd",
+]
+
 [[package]]
 name = "schannel"
 version = "0.1.29"
@@ -12223,6 +12232,12 @@ dependencies = [
  "untrusted 0.9.0",
 ]
 
+[[package]]
+name = "sdd"
+version = "3.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "490dcfcbfef26be6800d11870ff2df8774fa6e86d047e3e8c8a76b25655e41ca"
+
 [[package]]
 name = "seahash"
 version = "4.1.0"
@@ -12559,6 +12574,32 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serial_test"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "911bd979bf1070a3f3aa7b691a3b3e9968f339ceeec89e08c280a8a22207a32f"
+dependencies = [
+ "futures-executor",
+ "futures-util",
+ "log",
+ "once_cell",
+ "parking_lot",
+ "scc",
+ "serial_test_derive",
+]
+
+[[package]]
+name = "serial_test_derive"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a7d91949b85b0d2fb687445e448b40d322b6b3e4af6b44a29b21d9a5f33e6d9"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "sha1"
 version = "0.10.6"
@@ -15971,6 +16012,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "serde_yml",
+ "serial_test",
  "sha1",
  "sha2 0.10.9",
  "sql-builder",

backend/ee-repo-ref.txt

@@ -1 +1 @@
-9d9e0284b336c0ee4493143391b931d47872bf3e
+91cd9ca431ec5b80b038573b5a5efa9773dafaa1

backend/windmill-common/src/server.rs

@@ -11,6 +11,7 @@ pub struct Smtp {
     pub from: String,
     pub tls_implicit: Option<bool>,
     pub disable_tls: Option<bool>,
+    pub clicktracking_off: Option<bool>,
 }
 
 #[derive(Serialize, Deserialize, PartialEq)]
@@ -22,6 +23,7 @@ pub struct SmtpConfigOpt {
     pub smtp_from: Option<String>,
     pub smtp_tls_implicit: Option<bool>,
     pub smtp_disable_tls: Option<bool>,
+    pub smtp_clicktracking_off: Option<bool>,
 }
 
 pub async fn load_smtp_config(db: &DB) -> error::Result<Option<Smtp>> {
@@ -46,6 +48,7 @@ pub async fn load_smtp_config(db: &DB) -> error::Result<Option<Smtp>> {
             from: config
                 .smtp_from
                 .unwrap_or_else(|| "noreply@getwindmill.com".to_string()),
+            clicktracking_off: config.smtp_clicktracking_off,
         })
     } else {
         None
@@ -72,6 +75,9 @@ pub async fn load_smtp_config(db: &DB) -> error::Result<Option<Smtp>> {
                     .unwrap_or(587),
                 from: std::env::var("SMTP_FROM")
                     .unwrap_or_else(|_| "noreply@getwindmill.com".to_string()),
+                clicktracking_off: std::env::var("SMTP_CLICKTRACKING_OFF")
+                    .ok()
+                    .and_then(|p| p.parse().ok()),
             })
         } else {
             None
@@ -94,6 +100,7 @@ impl Default for SmtpConfigOpt {
             smtp_tls_implicit: None,
             smtp_username: None,
             smtp_disable_tls: None,
+            smtp_clicktracking_off: None,
         }
     }
 }

frontend/src/lib/components/instanceSettings/SmtpSettings.svelte

@@ -145,6 +145,14 @@
 				}}
 				options={{ right: 'Disable TLS' }}
 			/>
+
+			<Toggle
+				id="smtp_clicktracking_off"
+				{disabled}
+				bind:checked={$values['smtp_settings'].smtp_clicktracking_off}
+				size="xs"
+				options={{ right: 'Disable click tracking on links' }}
+			/>
 		</div>
 
 		<!-- Test Email -->