Move the ntfy alert sink to Settings, shared by all alert rules

Alert rules no longer carry their own ntfy topic/server; Settings now
holds one process-wide ntfy sink (with its own "send test notification"),
and the Alerts panel is left to just define rule conditions.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XFUNZwCvz3kcod3352ZR2o

src/alerts.rs

@@ -25,7 +25,6 @@ pub struct AlertRule {
     pub name: String,
     pub enabled: bool,
     pub condition: AlertCondition,
-    pub sink: AlertSink,
 }
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
@@ -54,17 +53,6 @@ pub enum AlertCondition {
     },
 }
 
-/// Modeled as an enum (rather than bare fields on `AlertRule`) so more sink kinds can be added later without reshaping it.
-#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
-#[serde(tag = "kind", rename_all = "lowercase")]
-pub enum AlertSink {
-    Ntfy {
-        topic: String,
-        /// Defaults to `https://ntfy.sh` when absent.
-        server: Option<String>,
-    },
-}
-
 #[derive(Debug)]
 pub enum AlertError {
     NotFound,
@@ -107,9 +95,8 @@ impl Settings {
         name: String,
         enabled: bool,
         condition: AlertCondition,
-        sink: AlertSink,
     ) -> Result<AlertRule, AlertError> {
-        let rule = AlertRule { id: generate_alert_rule_id(&name), name, enabled, condition, sink };
+        let rule = AlertRule { id: generate_alert_rule_id(&name), name, enabled, condition };
         self.alert_rules.push(rule.clone());
         self.save(settings_path)?;
         Ok(rule)
@@ -122,7 +109,6 @@ impl Settings {
         name: String,
         enabled: bool,
         condition: AlertCondition,
-        sink: AlertSink,
     ) -> Result<AlertRule, AlertError> {
         let rule = self
             .alert_rules
@@ -132,7 +118,6 @@ impl Settings {
         rule.name = name;
         rule.enabled = enabled;
         rule.condition = condition;
-        rule.sink = sink;
         let updated = rule.clone();
         self.save(settings_path)?;
         Ok(updated)
@@ -322,15 +307,16 @@ fn evaluate_condition(
     }
 }
 
-/// Errors are only logged (no retry queue); spawned off the ingest hot path so a slow/unreachable sink never blocks ingestion.
+/// Delivers to the single, process-wide ntfy sink configured in Settings. Errors are only logged
-pub async fn deliver_for_rule(rule: AlertRule, message: String) {
+/// (no retry queue); spawned off the ingest hot path so a slow/unreachable sink never blocks ingestion.
-    match rule.sink {
+/// A silently no-op'd delivery (no topic configured) is expected — a rule can be defined before the sink is.
-        AlertSink::Ntfy { topic, server } => {
+pub async fn deliver_for_rule(rule_name: String, message: String, topic: Option<String>, server: Option<String>) {
-            let server = server.unwrap_or_else(|| "https://ntfy.sh".to_string());
+    let Some(topic) = topic else {
-            if let Err(err) = deliver_ntfy(&server, &topic, &message).await {
+        return;
-                eprintln!("warning: failed to deliver alert '{}' via ntfy: {err}", rule.name);
+    };
-            }
+    let server = server.unwrap_or_else(|| "https://ntfy.sh".to_string());
-        }
+    if let Err(err) = deliver_ntfy(&server, &topic, &message).await {
+        eprintln!("warning: failed to deliver alert '{rule_name}' via ntfy: {err}");
     }
 }
 
@@ -364,7 +350,6 @@ mod tests {
             name: "test rule".to_string(),
             enabled: true,
             condition: AlertCondition::Immediate { query: query.to_string() },
-            sink: AlertSink::Ntfy { topic: "alerts".to_string(), server: None },
         }
     }
 
@@ -380,7 +365,6 @@ mod tests {
                 "spike".to_string(),
                 true,
                 AlertCondition::Immediate { query: r#"regex("error")"#.to_string() },
-                AlertSink::Ntfy { topic: "alerts".to_string(), server: None },
             )
             .unwrap();
         assert_eq!(settings.alert_rules.len(), 1);
@@ -395,7 +379,6 @@ mod tests {
                 "renamed".to_string(),
                 false,
                 AlertCondition::Immediate { query: r#"regex("warn")"#.to_string() },
-                AlertSink::Ntfy { topic: "other".to_string(), server: Some("https://example.com".to_string()) },
             )
             .unwrap();
         assert_eq!(updated.id, created.id);
@@ -420,7 +403,6 @@ mod tests {
             "x".to_string(),
             true,
             AlertCondition::Immediate { query: r#"regex("x")"#.to_string() },
-            AlertSink::Ntfy { topic: "x".to_string(), server: None },
         );
         assert!(matches!(result, Err(AlertError::NotFound)));
 
@@ -463,7 +445,6 @@ mod tests {
                 threshold: 3.0,
                 window_ms: 10_000,
             },
-            sink: AlertSink::Ntfy { topic: "alerts".to_string(), server: None },
         };
         let mut states = HashMap::new();
         for (seq, ms) in [(0u64, 0i64), (1, 1000)] {
@@ -489,7 +470,6 @@ mod tests {
                 threshold: 2.0,
                 window_ms: 1_000,
             },
-            sink: AlertSink::Ntfy { topic: "alerts".to_string(), server: None },
         };
         let mut states = HashMap::new();
         assert!(evaluate_alerts(&[rule.clone()], &mut states, 0, Timestamp::from_millis(0), "error").is_empty());
@@ -507,7 +487,6 @@ mod tests {
                 field_regex: r"agent=(?P<agent>\S+)".to_string(),
                 capture_group: "agent".to_string(),
             },
-            sink: AlertSink::Ntfy { topic: "alerts".to_string(), server: None },
         };
         let mut states = HashMap::new();
         let fired = evaluate_alerts(&[rule.clone()], &mut states, 0, Timestamp::from_millis(0), "agent=curl");
@@ -531,7 +510,6 @@ mod tests {
                 ratio: 0.5,
                 window_ms: 10_000,
             },
-            sink: AlertSink::Ntfy { topic: "alerts".to_string(), server: None },
         };
         let mut states = HashMap::new();
         // Only an "error" so far; no "request" yet, so denominator is 0 -> skip.

src/api.rs

@@ -423,7 +423,7 @@ async fn create_alert_rule(
     Json(body): Json<CreateAlertRuleRequest>,
 ) -> impl IntoResponse {
     let mut settings = state.settings.lock().unwrap();
-    match settings.create_alert_rule(&state.settings_path, body.name, body.enabled, body.condition, body.sink) {
+    match settings.create_alert_rule(&state.settings_path, body.name, body.enabled, body.condition) {
         Ok(rule) => (StatusCode::CREATED, Json(rule)).into_response(),
         Err(err) => alert_error_response(err),
     }
@@ -435,7 +435,7 @@ async fn update_alert_rule(
     Json(body): Json<UpdateAlertRuleRequest>,
 ) -> impl IntoResponse {
     let mut settings = state.settings.lock().unwrap();
-    match settings.update_alert_rule(&state.settings_path, &id, body.name, body.enabled, body.condition, body.sink) {
+    match settings.update_alert_rule(&state.settings_path, &id, body.name, body.enabled, body.condition) {
         Ok(rule) => Json(rule).into_response(),
         Err(err) => alert_error_response(err),
     }
@@ -481,6 +481,12 @@ async fn update_settings(
         if let Some(custom_theme_id) = body.custom_theme_id {
             settings.custom_theme_id = custom_theme_id;
         }
+        if let Some(ntfy_topic) = body.ntfy_topic {
+            settings.ntfy_topic = ntfy_topic;
+        }
+        if let Some(ntfy_server) = body.ntfy_server {
+            settings.ntfy_server = ntfy_server;
+        }
         match settings.save(&state.settings_path) {
             Ok(()) => (),
             Err(err) => return (StatusCode::INTERNAL_SERVER_ERROR, err.to_string()).into_response(),
@@ -756,8 +762,7 @@ mod tests {
             json!({
                 "name": "error spike",
                 "enabled": true,
-                "condition": { "kind": "immediate", "query": "regex(\"error\")" },
+                "condition": { "kind": "immediate", "query": "regex(\"error\")" }
-                "sink": { "kind": "ntfy", "topic": "alerts", "server": null }
             }),
         )
         .await;
@@ -776,8 +781,7 @@ mod tests {
             json!({
                 "name": "renamed",
                 "enabled": false,
-                "condition": { "kind": "immediate", "query": "regex(\"warn\")" },
+                "condition": { "kind": "immediate", "query": "regex(\"warn\")" }
-                "sink": { "kind": "ntfy", "topic": "alerts", "server": null }
             }),
         )
         .await;
@@ -807,8 +811,7 @@ mod tests {
                 json!({
                     "name": "x",
                     "enabled": true,
-                    "condition": { "kind": "immediate", "query": "regex(\"x\")" },
+                    "condition": { "kind": "immediate", "query": "regex(\"x\")" }
-                    "sink": { "kind": "ntfy", "topic": "x", "server": null }
                 })
                 .to_string(),
             ))

src/dto.rs

@@ -1,4 +1,4 @@
-use crate::alerts::{AlertCondition, AlertSink};
+use crate::alerts::AlertCondition;
 use crate::data_value::{MetricPrimitiveKind, RegexToMetricPrimitiveMatcher};
 use crate::metric_primitive::MetricPrimitive;
 use crate::profile::{ChartType, Dashboard, Panel, Profile};
@@ -171,6 +171,10 @@ pub struct SettingsDto {
     pub max_logs: Option<usize>,
     /// Id of the selected custom theme entry, if any. `None` means `color_scheme` alone determines the active palette.
     pub custom_theme_id: Option<String>,
+    /// Ntfy topic every alert rule delivers to; `None` until configured.
+    pub ntfy_topic: Option<String>,
+    /// Ntfy server override; `None` means `https://ntfy.sh`.
+    pub ntfy_server: Option<String>,
 }
 
 impl From<&Settings> for SettingsDto {
@@ -180,11 +184,13 @@ impl From<&Settings> for SettingsDto {
             active_profile: settings.profiles.active_profile.clone(),
             max_logs: settings.max_logs,
             custom_theme_id: settings.custom_theme_id.clone(),
+            ntfy_topic: settings.ntfy_topic.clone(),
+            ntfy_server: settings.ntfy_server.clone(),
         }
     }
 }
 
-/// `max_logs`/`custom_theme_id` distinguish "omitted" (leave unchanged) from "present" (null clears, value sets), via `deserialize_double_option`.
+/// `max_logs`/`custom_theme_id`/`ntfy_topic`/`ntfy_server` distinguish "omitted" (leave unchanged) from "present" (null clears, value sets), via `deserialize_double_option`.
 #[derive(Debug, Deserialize)]
 pub struct UpdateSettingsRequest {
     pub color_scheme: Option<ColorScheme>,
@@ -192,6 +198,10 @@ pub struct UpdateSettingsRequest {
     pub max_logs: Option<Option<usize>>,
     #[serde(default, deserialize_with = "deserialize_double_option")]
     pub custom_theme_id: Option<Option<String>>,
+    #[serde(default, deserialize_with = "deserialize_double_option")]
+    pub ntfy_topic: Option<Option<String>>,
+    #[serde(default, deserialize_with = "deserialize_double_option")]
+    pub ntfy_server: Option<Option<String>>,
 }
 
 /// Distinguishes a missing field (outer `None`) from present `null` (`Some(None)`) or present value (`Some(Some(value))`), which plain `Option<Option<T>>` can't do alone.
@@ -208,7 +218,6 @@ pub struct CreateAlertRuleRequest {
     pub name: String,
     pub enabled: bool,
     pub condition: AlertCondition,
-    pub sink: AlertSink,
 }
 
 #[derive(Debug, Deserialize)]
@@ -216,7 +225,6 @@ pub struct UpdateAlertRuleRequest {
     pub name: String,
     pub enabled: bool,
     pub condition: AlertCondition,
-    pub sink: AlertSink,
 }
 
 /// `server` defaults to `https://ntfy.sh` when absent.

src/engine.rs

@@ -130,10 +130,13 @@ pub async fn run(mut rx: mpsc::Receiver<EngineMessage>, settings: SettingsHandle
                 evict_excess_logs(&mut index, &mut log_count, max_logs);
 
                 // Evaluate alert rules against just this line, then hand any fired rule off to delivery via tokio::spawn so it stays off the hot path.
-                let rules = settings.lock().unwrap().alert_rules.clone();
+                let (rules, ntfy_topic, ntfy_server) = {
+                    let settings = settings.lock().unwrap();
+                    (settings.alert_rules.clone(), settings.ntfy_topic.clone(), settings.ntfy_server.clone())
+                };
                 let fired = alerts::evaluate_alerts(&rules, &mut alert_states, sequence, timestamp, &text);
                 for (rule, message) in fired {
-                    tokio::spawn(alerts::deliver_for_rule(rule, message));
+                    tokio::spawn(alerts::deliver_for_rule(rule.name, message, ntfy_topic.clone(), ntfy_server.clone()));
                 }
             }
             EngineMessage::SetMaxLogs(new_max) => {

src/settings.rs

@@ -78,6 +78,12 @@ pub struct Settings {
     /// Alert rule definitions.
     #[serde(default)]
     pub alert_rules: Vec<AlertRule>,
+    /// Ntfy topic every alert rule delivers to; `None` until configured in Settings.
+    #[serde(default)]
+    pub ntfy_topic: Option<String>,
+    /// Ntfy server override; `None` means `https://ntfy.sh`.
+    #[serde(default)]
+    pub ntfy_server: Option<String>,
 }
 
 impl Default for Settings {
@@ -93,6 +99,8 @@ impl Default for Settings {
             },
             max_logs: None,
             alert_rules: Vec::new(),
+            ntfy_topic: None,
+            ntfy_server: None,
         }
     }
 }
@@ -333,11 +341,8 @@ mod tests {
             condition: crate::alerts::AlertCondition::Immediate {
                 query: r#"regex("error")"#.to_string(),
             },
-            sink: crate::alerts::AlertSink::Ntfy {
-                topic: "alerts".to_string(),
-                server: None,
-            },
         });
+        settings.ntfy_topic = Some("alerts".to_string());
 
         settings.save(&path).unwrap();
 

webapp/src/components/Alerts.tsx

@@ -4,7 +4,6 @@ import {
   createAlertRule,
   deleteAlertRule,
   fetchAlertRules,
-  sendTestAlertNotification,
   updateAlertRule,
   type AlertCondition,
   type AlertRule,
@@ -68,8 +67,6 @@ interface FormState {
   queryA: string
   queryB: string
   ratio: string
-  topic: string
-  server: string
 }
 
 const EMPTY_FORM: FormState = {
@@ -85,8 +82,6 @@ const EMPTY_FORM: FormState = {
   queryA: '',
   queryB: '',
   ratio: '',
-  topic: '',
-  server: '',
 }
 
 function formFromRule(rule: AlertRule): FormState {
@@ -113,8 +108,6 @@ function formFromRule(rule: AlertRule): FormState {
       base.windowInput = String(rule.condition.window_ms)
       break
   }
-  base.topic = rule.sink.topic
-  base.server = rule.sink.server ?? ''
   return base
 }
 
@@ -158,9 +151,6 @@ export function Alerts() {
   const [form, setForm] = useState<FormState>(EMPTY_FORM)
   const [submitError, setSubmitError] = useState<string | null>(null)
   const [submitting, setSubmitting] = useState(false)
-  const [testError, setTestError] = useState<string | null>(null)
-  const [testSuccess, setTestSuccess] = useState(false)
-  const [testing, setTesting] = useState(false)
 
   async function loadRules() {
     try {
@@ -182,16 +172,12 @@ export function Alerts() {
     setEditingId(null)
     setForm(EMPTY_FORM)
     setSubmitError(null)
-    setTestError(null)
-    setTestSuccess(false)
   }
 
   function startEdit(rule: AlertRule) {
     setEditingId(rule.id)
     setForm(formFromRule(rule))
     setSubmitError(null)
-    setTestError(null)
-    setTestSuccess(false)
   }
 
   async function handleSubmit(e: React.FormEvent) {
@@ -201,10 +187,6 @@ export function Alerts() {
       setSubmitError('Name is required.')
       return
     }
-    if (!form.topic.trim()) {
-      setSubmitError('Ntfy topic is required.')
-      return
-    }
     const { error, condition } = buildCondition(form)
     if (error || !condition) {
       setSubmitError(error ?? 'Invalid condition.')
@@ -212,7 +194,7 @@ export function Alerts() {
     }
     setSubmitting(true)
     try {
-      const rule = { name: form.name, enabled: form.enabled, condition, sink: { kind: 'ntfy' as const, topic: form.topic, server: form.server.trim() || null } }
+      const rule = { name: form.name, enabled: form.enabled, condition }
       if (editingId) {
         await updateAlertRule(editingId, rule)
       } else {
@@ -239,31 +221,13 @@ export function Alerts() {
 
   async function handleToggleEnabled(rule: AlertRule) {
     try {
-      await updateAlertRule(rule.id, { name: rule.name, enabled: !rule.enabled, condition: rule.condition, sink: rule.sink })
+      await updateAlertRule(rule.id, { name: rule.name, enabled: !rule.enabled, condition: rule.condition })
       await loadRules()
     } catch {
       // best-effort; list refresh will show the previous state on failure
     }
   }
 
-  async function handleTestNotification() {
-    setTestError(null)
-    setTestSuccess(false)
-    if (!form.topic.trim()) {
-      setTestError('Enter a topic to send a test notification.')
-      return
-    }
-    setTesting(true)
-    try {
-      await sendTestAlertNotification(form.topic, form.server.trim() || null)
-      setTestSuccess(true)
-    } catch (err) {
-      setTestError(err instanceof Error ? err.message : 'Failed to send test notification')
-    } finally {
-      setTesting(false)
-    }
-  }
-
   return (
     <div className="border-b border-border text-sm">
       <div className={sectionHeaderClassName}>
@@ -272,6 +236,9 @@ export function Alerts() {
           <HelpIcon sectionId="alerts" label="Help: Alerts" />
         </div>
       </div>
+      <p className="px-3 pt-3 text-xs text-text-faint">
+        Every rule delivers to the ntfy sink configured in Settings.
+      </p>
       <div className="flex gap-4 p-3">
         <form onSubmit={handleSubmit} className="w-96 shrink-0 space-y-2">
           <div>
@@ -424,35 +391,12 @@ export function Alerts() {
             </div>
           )}
 
-          <div>
-            <div className="mb-1 flex items-center gap-1.5 text-xs text-text-subtle">
-              <span>Ntfy sink</span>
-              <HelpIcon sectionId="alerts" label="Help: Alert sink" />
-            </div>
-            <div className="flex gap-1">
-              <input
-                className="w-1/2 min-w-0 flex-1 rounded border border-border-soft bg-surface-1 px-2 py-1 text-sm text-text placeholder:text-text-subtle focus:border-border-strong focus:outline-none"
-                value={form.topic}
-                onChange={(e) => patch({ topic: e.target.value })}
-                placeholder="topic"
-              />
-              <input
-                className="w-1/2 min-w-0 flex-1 rounded border border-border-soft bg-surface-1 px-2 py-1 text-sm text-text placeholder:text-text-subtle focus:border-border-strong focus:outline-none"
-                value={form.server}
-                onChange={(e) => patch({ server: e.target.value })}
-                placeholder="https://ntfy.sh"
-              />
-            </div>
-          </div>
-
           <label className="flex items-center gap-1.5 text-xs text-text-secondary">
             <input type="checkbox" checked={form.enabled} onChange={(e) => patch({ enabled: e.target.checked })} />
             Enabled
           </label>
 
           {submitError && <div className="rounded border border-danger-border bg-danger-bg/50 px-2 py-1 text-xs text-danger-text">{submitError}</div>}
-          {testError && <div className="rounded border border-danger-border bg-danger-bg/50 px-2 py-1 text-xs text-danger-text">{testError}</div>}
-          {testSuccess && <div className="rounded border border-border-soft px-2 py-1 text-xs text-text-secondary">Test notification sent.</div>}
 
           <div className="flex gap-2">
             <button
@@ -462,14 +406,6 @@ export function Alerts() {
             >
               {submitting ? 'Saving…' : editingId ? 'Save rule' : 'Create rule'}
             </button>
-            <button
-              type="button"
-              onClick={handleTestNotification}
-              disabled={testing}
-              className="rounded border border-border-soft px-3 py-1 text-sm text-text-secondary hover:bg-surface-2 disabled:opacity-50"
-            >
-              {testing ? 'Sending…' : 'Send test notification'}
-            </button>
             {editingId && (
               <button type="button" onClick={startCreate} className="rounded border border-border-soft px-3 py-1 text-sm text-text-secondary hover:bg-surface-2">
                 Cancel

webapp/src/components/NavMenu.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useState } from 'react'
 import type { Stats } from '../lib/api'
-import { cssContentUrl, type ColorScheme, type CssEntry } from '../lib/api'
+import { cssContentUrl, sendTestAlertNotification, type ColorScheme, type CssEntry } from '../lib/api'
 import { useSettingsPanel } from '../lib/useSettingsPanel'
 import { useDocsNav, type DocsTarget } from '../lib/docsNav'
 import { DocsPanel } from './Docs'
@@ -147,11 +147,47 @@ function SettingsPanel({ panel }: { panel: ReturnType<typeof useSettingsPanel> }
   const [themeFilename, setThemeFilename] = useState('')
   const [themeContent, setThemeContent] = useState('')
   const [themeLinkUrl, setThemeLinkUrl] = useState('')
+  const [ntfyTopicInput, setNtfyTopicInput] = useState('')
+  const [ntfyServerInput, setNtfyServerInput] = useState('')
+  const [ntfyTestError, setNtfyTestError] = useState<string | null>(null)
+  const [ntfyTestSuccess, setNtfyTestSuccess] = useState(false)
+  const [ntfyTesting, setNtfyTesting] = useState(false)
 
   useEffect(() => {
     setMaxLogsInput(panel.settings?.max_logs != null ? String(panel.settings.max_logs) : '')
   }, [panel.settings?.max_logs])
 
+  useEffect(() => {
+    setNtfyTopicInput(panel.settings?.ntfy_topic ?? '')
+    setNtfyServerInput(panel.settings?.ntfy_server ?? '')
+  }, [panel.settings?.ntfy_topic, panel.settings?.ntfy_server])
+
+  function handleNtfyTopicBlur() {
+    panel.setNtfySink(ntfyTopicInput.trim() || null, panel.settings?.ntfy_server ?? null)
+  }
+
+  function handleNtfyServerBlur() {
+    panel.setNtfySink(panel.settings?.ntfy_topic ?? null, ntfyServerInput.trim() || null)
+  }
+
+  async function handleNtfyTest() {
+    setNtfyTestError(null)
+    setNtfyTestSuccess(false)
+    if (!ntfyTopicInput.trim()) {
+      setNtfyTestError('Enter a topic to send a test notification.')
+      return
+    }
+    setNtfyTesting(true)
+    try {
+      await sendTestAlertNotification(ntfyTopicInput.trim(), ntfyServerInput.trim() || null)
+      setNtfyTestSuccess(true)
+    } catch (err) {
+      setNtfyTestError(err instanceof Error ? err.message : 'Failed to send test notification')
+    } finally {
+      setNtfyTesting(false)
+    }
+  }
+
   function handleMaxLogsBlur() {
     const trimmed = maxLogsInput.trim()
     if (trimmed === '') {
@@ -369,6 +405,42 @@ function SettingsPanel({ panel }: { panel: ReturnType<typeof useSettingsPanel> }
         </div>
       </section>
 
+      <section>
+        <div className="mb-2 flex items-center gap-1.5">
+          <h3 className="text-xs font-semibold uppercase tracking-wide text-text-subtle">Ntfy sink</h3>
+          <HelpIcon sectionId="alerts" label="Help: Ntfy sink" />
+        </div>
+        <div className="flex flex-col gap-2">
+          <input
+            type="text"
+            placeholder="topic"
+            value={ntfyTopicInput}
+            onChange={(e) => setNtfyTopicInput(e.target.value)}
+            onBlur={handleNtfyTopicBlur}
+            className="rounded border border-border-soft bg-surface-1 px-2 py-1 text-xs text-text placeholder:text-text-subtle focus:border-border-strong focus:outline-none"
+          />
+          <input
+            type="text"
+            placeholder="https://ntfy.sh"
+            value={ntfyServerInput}
+            onChange={(e) => setNtfyServerInput(e.target.value)}
+            onBlur={handleNtfyServerBlur}
+            className="rounded border border-border-soft bg-surface-1 px-2 py-1 text-xs text-text placeholder:text-text-subtle focus:border-border-strong focus:outline-none"
+          />
+          {ntfyTestError && <div className="text-xs text-danger-text-strong">{ntfyTestError}</div>}
+          {ntfyTestSuccess && <div className="text-xs text-text-secondary">Test notification sent.</div>}
+          <button
+            type="button"
+            onClick={handleNtfyTest}
+            disabled={ntfyTesting}
+            className="self-start rounded border border-border-soft px-2 py-1 text-xs text-text hover:bg-surface-2 disabled:opacity-50"
+          >
+            {ntfyTesting ? 'Sending…' : 'Send test notification'}
+          </button>
+          <p className="text-[11px] text-text-faint">Every alert rule delivers here — see the Alerts panel to define rules.</p>
+        </div>
+      </section>
+
       <section>
         <h3 className="mb-2 text-xs font-semibold uppercase tracking-wide text-text-subtle">Import CSS</h3>
         <form onSubmit={handleImport} className="flex flex-col gap-2">

webapp/src/lib/api.ts

@@ -98,6 +98,10 @@ export interface Settings {
   max_logs: number | null
   /** Id of the selected custom theme entry, or `null` if `color_scheme` alone applies. */
   custom_theme_id: string | null
+  /** Ntfy topic every alert rule delivers to; `null` until configured. */
+  ntfy_topic: string | null
+  /** Ntfy server override; `null` means `https://ntfy.sh`. */
+  ntfy_server: string | null
 }
 
 export type CssEntryKind = 'imported' | 'linked'
@@ -148,15 +152,11 @@ export type AlertCondition =
   | { kind: 'newvalue'; field_regex: string; capture_group: string }
   | { kind: 'ratio'; query_a: string; query_b: string; op: CompareOp; ratio: number; window_ms: number }
 
-// Only one sink kind exists today, but this stays a tagged union to match the backend.
-export type AlertSink = { kind: 'ntfy'; topic: string; server: string | null }
-
 export interface AlertRule {
   id: string
   name: string
   enabled: boolean
   condition: AlertCondition
-  sink: AlertSink
 }
 
 async function getJson<T>(path: string): Promise<T> {
@@ -297,10 +297,16 @@ export function updateSettings(update: {
   maxLogs?: number | null
   /** Omit to leave unchanged; `null` clears the selection (falls back to `colorScheme`). */
   customThemeId?: string | null
+  /** Omit to leave unchanged; `null` clears the configured topic. */
+  ntfyTopic?: string | null
+  /** Omit to leave unchanged; `null` falls back to `https://ntfy.sh`. */
+  ntfyServer?: string | null
 }): Promise<Settings> {
   const body: Record<string, unknown> = { color_scheme: update.colorScheme }
   if ('maxLogs' in update) body.max_logs = update.maxLogs
   if ('customThemeId' in update) body.custom_theme_id = update.customThemeId
+  if ('ntfyTopic' in update) body.ntfy_topic = update.ntfyTopic
+  if ('ntfyServer' in update) body.ntfy_server = update.ntfyServer
   return sendJson('/api/settings', 'PATCH', body)
 }
 
@@ -384,13 +390,13 @@ export function fetchAlertRules(): Promise<AlertRule[]> {
   return getJson('/api/settings/alerts')
 }
 
-export function createAlertRule(rule: { name: string; enabled: boolean; condition: AlertCondition; sink: AlertSink }): Promise<AlertRule> {
+export function createAlertRule(rule: { name: string; enabled: boolean; condition: AlertCondition }): Promise<AlertRule> {
   return postJson('/api/settings/alerts', rule)
 }
 
 export function updateAlertRule(
   id: string,
-  rule: { name: string; enabled: boolean; condition: AlertCondition; sink: AlertSink },
+  rule: { name: string; enabled: boolean; condition: AlertCondition },
 ): Promise<AlertRule> {
   return sendJson(`/api/settings/alerts/${encodeURIComponent(id)}`, 'PUT', rule)
 }

webapp/src/lib/useSettingsPanel.ts

@@ -153,6 +153,15 @@ export function useSettingsPanel() {
     [guarded],
   )
 
+  const setNtfySink = useCallback(
+    (ntfyTopic: string | null, ntfyServer: string | null) =>
+      guarded(async () => {
+        const next = await updateSettings({ ntfyTopic, ntfyServer })
+        setSettings(next)
+      })(),
+    [guarded],
+  )
+
   const importCssEntry = useCallback(
     (filename: string, content: string) =>
       guarded(async () => {
@@ -230,6 +239,7 @@ export function useSettingsPanel() {
     setColorScheme,
     setCustomTheme,
     setMaxLogs,
+    setNtfySink,
     importCssEntry,
     importThemeEntry,
     linkThemeEntry,