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

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)
 }