feat(settings): merge email digest schedule controls onto email-notifications

Resolves PR #5 conflict resolution: rebased the digest-schedule work (from
flotilla-fc1, built against dev) onto the email-notifications branch.

- settings.ts: add emailHour/emailMinute/emailDayOfWeek/emailTimezone to
  SettingsValues + defaults (17:00, device timezone, dayOfWeek undefined)
- alerts/+page.svelte: keep the email-notifications card (gated on
  EMAIL_NOTIFICATION_SERVER, communities warning, error state, NIP-98
  register/enable flow); add HH:MM time input + weekly day-of-week picker;
  weekly select defaults dayOfWeek to Monday; publish schedule fields via
  AppData publishSettings
- mail/index.ts: register() accepts hour/minute/dayOfWeek/timezone and PUTs
  them to mailship; enable()/sync() pass stored schedule through

Dropped dev-based duplicates: src/app/mail.ts, VITE_MAILSHIP_URL (.env +
env.ts) — the email-notifications mail adapter and
VITE_EMAIL_NOTIFICATION_SERVER are canonical. PUT contract matches mailship
PR #28: {email, frequency, hour, minute, dayOfWeek, timezone}.

src/app/mail/index.ts

@@ -79,7 +79,14 @@ export class MailNotifications {
   // Mail.sync) coalesce into a single PUT instead of racing two subscriptions.
   _register = maybe<Promise<void>>()
 
-  async register(email: string, frequency: string) {
+  async register(
+    email: string,
+    frequency: string,
+    hour = 17,
+    minute = 0,
+    dayOfWeek?: number,
+    timezone = Intl.DateTimeFormat().resolvedOptions().timeZone || "UTC",
+  ) {
     if (this._register) return this._register
 
     this._register = call(async () => {
@@ -99,7 +106,7 @@ export class MailNotifications {
           throw new Error("Email notification server not configured")
         }
 
-        const body = {email, frequency}
+        const body = {email, frequency, hour, minute, dayOfWeek, timezone}
         const bodyJson = JSON.stringify(body)
 
         let authEvent
@@ -224,7 +231,8 @@ export class MailNotifications {
 
     // Register if we don't have a subscription yet
     if (!emailNotificationState.get().callback && email && frequency) {
-      await this.register(email, frequency)
+      const {emailHour, emailMinute, emailDayOfWeek, emailTimezone} = userSettingsValues.get()
+      await this.register(email, frequency, emailHour, emailMinute, emailDayOfWeek, emailTimezone)
     }
 
     // Sync kind 30390 subscriptions for the email digest. Filters are derived
@@ -254,7 +262,16 @@ export class MailNotifications {
   sync() {
     let reconciledPubkey: string | undefined
 
-    return userSettingsValues.subscribe(async ({email, emailAddress, emailFrequency}) => {
+    return userSettingsValues.subscribe(
+      async ({
+        email,
+        emailAddress,
+        emailFrequency,
+        emailHour,
+        emailMinute,
+        emailDayOfWeek,
+        emailTimezone,
+      }) => {
         const $pubkey = app.get().user?.pubkey
         if (!$pubkey || reconciledPubkey === $pubkey) return
 
@@ -276,9 +293,23 @@ export class MailNotifications {
 
         try {
           if (!existing) {
-          await this.register(emailAddress, emailFrequency)
+            await this.register(
+              emailAddress,
+              emailFrequency,
+              emailHour,
+              emailMinute,
+              emailDayOfWeek,
+              emailTimezone,
+            )
           } else if (existing.email !== emailAddress || existing.frequency !== emailFrequency) {
-          await this.register(emailAddress, emailFrequency)
+            await this.register(
+              emailAddress,
+              emailFrequency,
+              emailHour,
+              emailMinute,
+              emailDayOfWeek,
+              emailTimezone,
+            )
           } else {
             emailNotificationState.set({
               key: existing.key,
@@ -293,7 +324,8 @@ export class MailNotifications {
         }
 
         await this.enable()
-    })
+      },
+    )
   }
 
   _getSubscriptionIdentifier = async (relay: string, key: string) => {

src/app/settings.ts

@@ -37,6 +37,10 @@ export type SettingsValues = {
   emailAddress: string
   emailFrequency: string
   emailSalt: string
+  emailHour: number
+  emailMinute: number
+  emailDayOfWeek: number | undefined
+  emailTimezone: string
 }
 
 export const defaultSettings: SettingsValues = {
@@ -53,6 +57,10 @@ export const defaultSettings: SettingsValues = {
   emailAddress: "",
   emailFrequency: "daily",
   emailSalt: "",
+  emailHour: 17,
+  emailMinute: 0,
+  emailDayOfWeek: undefined,
+  emailTimezone: Intl.DateTimeFormat().resolvedOptions().timeZone || "UTC",
 }
 
 export class Settings extends DerivedPlugin<AppDataReader> {
@@ -107,6 +115,7 @@ export const notificationSettings = withGetter(
     spaces: true,
     mentions: true,
     messages: true,
+    email: false,
   }),
 )
 
@@ -183,3 +192,9 @@ export const toggleRoomNotifications = (url: string, h: string) => {
 
   return publishSettings({alerts: [...alerts, {url, notify: true, exceptions: [h]}]})
 }
+
+export const publishEmailSettings = (
+  params: Partial<
+    Pick<SettingsValues, "emailHour" | "emailMinute" | "emailDayOfWeek" | "emailTimezone">
+  >,
+) => publishSettings(params)

src/routes/settings/alerts/+page.svelte

@@ -44,6 +44,10 @@
       email: $userSettingsValues.email,
       emailAddress: $userSettingsValues.emailAddress,
       emailFrequency: $userSettingsValues.emailFrequency,
+      emailHour: $userSettingsValues.emailHour,
+      emailMinute: $userSettingsValues.emailMinute,
+      emailDayOfWeek: $userSettingsValues.emailDayOfWeek,
+      emailTimezone: $userSettingsValues.emailTimezone,
     }
   }
 
@@ -80,7 +84,14 @@
       // Handle email notification registration
       if (settings.email && settings.emailAddress) {
         try {
-          await Mail.register(settings.emailAddress, settings.emailFrequency)
+          await Mail.register(
+            settings.emailAddress,
+            settings.emailFrequency,
+            settings.emailHour,
+            settings.emailMinute,
+            settings.emailDayOfWeek,
+            settings.emailTimezone,
+          )
           await Mail.enable()
         } catch (e) {
           settings.email = false
@@ -101,6 +112,10 @@
         email: settings.email,
         emailAddress: settings.emailAddress,
         emailFrequency: settings.emailFrequency,
+        emailHour: settings.emailHour,
+        emailMinute: settings.emailMinute,
+        emailDayOfWeek: settings.emailDayOfWeek,
+        emailTimezone: settings.emailTimezone,
       })
 
       notificationSettings.set({
@@ -110,6 +125,7 @@
         spaces: settings.spaces,
         mentions: settings.mentions,
         messages: settings.messages,
+        email: settings.email,
       })
 
       pushToast({message: "Your settings have been saved!"})
@@ -281,12 +297,57 @@
               <select
                 class="select select-bordered"
                 bind:value={settings.emailFrequency}
-                onchange={clearError}>
+                onchange={e => {
+                  if (e.currentTarget.value === "weekly" && !settings.emailDayOfWeek) {
+                    settings.emailDayOfWeek = 1
+                  }
+                  clearError()
+                }}>
                 <option value="daily">Daily</option>
                 <option value="weekly">Weekly</option>
               </select>
             {/snippet}
           </FieldInline>
+          <FieldInline>
+            {#snippet label()}
+              <p>Time</p>
+            {/snippet}
+            {#snippet input()}
+              <input
+                type="time"
+                class="input input-bordered w-auto"
+                value={String(settings.emailHour).padStart(2, "0") +
+                  ":" +
+                  String(settings.emailMinute).padStart(2, "0")}
+                oninput={e => {
+                  const [h, m] = e.currentTarget.value.split(":").map(Number)
+                  settings.emailHour = h
+                  settings.emailMinute = m
+                }} />
+            {/snippet}
+          </FieldInline>
+          {#if settings.emailFrequency === "weekly"}
+            <FieldInline>
+              {#snippet label()}
+                <p>Day of week</p>
+              {/snippet}
+              {#snippet input()}
+                <div class="flex gap-1">
+                  {#each [{label: "M", value: 1}, {label: "T", value: 2}, {label: "W", value: 3}, {label: "T", value: 4}, {label: "F", value: 5}, {label: "S", value: 6}, {label: "S", value: 7}] as day (day.value)}
+                    <button
+                      type="button"
+                      class={cx("button button-sm size-8 rounded-md", {
+                        "button-primary": settings.emailDayOfWeek === day.value,
+                        "button-ghost": settings.emailDayOfWeek !== day.value,
+                      })}
+                      onclick={() => {
+                        settings.emailDayOfWeek = day.value
+                      }}>{day.label}</button>
+                  {/each}
+                </div>
+              {/snippet}
+            </FieldInline>
+          {/if}
         {/if}
         {#if $emailNotificationState.error}
           <div class="text-sm text-error p-3">