chore(api): remove User.prvkey field + thread-through helpers (Q1.2 Option b)

Atomic phase-1 final per design-questions Q1.2 Option (b) and the
2026-05-29T00:30Z architecture-decisions lock-in. Removing the
prvkey?: string field from the User interface flips the type system
into the pressure mechanism that forces phase-2 to start: every
remaining bucket-B sign-site (chat / forum / nostr-feed /
activities-bookmarks/RSVP / market / tasks) now fails vue-tsc until
it migrates to signEventViaLnbits() against POST /api/v1/auth/sign-event
(aiolabs/lnbits PR #29, deployed on aio-demo).

Changes:
- src/lib/api/lnbits.ts:
  - Drop `prvkey?: string` from User interface.
  - getCurrentUser(): /auth/nostr/me used to merge prvkey alongside
    pubkey; post-cascade the endpoint returns only the pubkey.
    Updated the comment + cleaned the merge object.
- src/modules/base/auth/auth-service.ts:
  - updateProfile() no longer threads `prvkey` through the merge.
    Server-side PATCH /auth publishes kind-0 via the signer per
    869f67c3; the webapp doesn't keep prvkey at all.
- src/modules/nostr-feed/components/NostrFeed.vue +
  src/modules/nostr-feed/components/ScheduledEventCard.vue:
  - Repoint the `ScheduledEvent` type import from the deleted
    `../services/ScheduledEventService` to
    `@/modules/tasks/services/TaskService`. Trivial post-#81-merge
    cleanup that fell through the dedup PR; same file exports the
    same interface.

vue-tsc --noEmit fails with 8 errors after this commit, all
TS2339 "Property 'prvkey' does not exist". The failing sites are
exactly the bucket-B targets the design doc enumerates as
phase-2 migration work:

| Failing site                                  | Bucket B kind |
|-----------------------------------------------|---------------|
| activities/composables/useBookmarks.ts:92,113 | kind 10003 (NIP-51 bookmarks) |
| activities/composables/useRSVP.ts:153,187     | kind 31925 (NIP-52 RSVP) |
| base/services/NostrTransportService.ts:100,112| kind 21000 (NIP-44 v2 RPC envelope) |
| market/composables/useMarket.ts:455           | NIP-44 gift-wrap (kind 1059) unwrap |
| nostr-feed/components/NostrFeed.vue:408       | kind 5 (deletion of own post) |

NOT caught by vue-tsc but still bucket-B (BaseService injection
pattern types `this.authService` as `any`, so optional chaining
bypasses the type check):

- chat/services/chat-service.ts:341,511,714
- forum/services/SubmissionService.ts:755,1167
- nostr-feed/services/SubmissionService.ts:769,1226
- nostr-feed/components/NoteComposer.vue:306
- nostr-feed/components/RideshareComposer.vue:423
- tasks/services/TaskService.ts:507,562,616

Those sites will runtime-fail (prvkey is undefined from the API
post-cascade) but won't surface at compile time. Phase 2's
per-module migration (Q5.2) catches them as each module flips.

The webapp WILL NOT BUILD CLEANLY after this PR merges to dev
until phase 2 lands. That's the intended trade-off per Q5.1 +
Q1.2; the broken-build interval is the design-intended pressure
mechanism to start phase 2. server-deploy's webapp-demo flake.lock
bump will fail until phase 2 lands; demo will stay on the
pre-PR-#84 webapp during that interval.

Refs:
- log:2026-05-29T00:30Z (consolidated decisions; Q1.2 Option (b)
  + Q5.1 risk: demo gap acceptable)
- log:2026-05-29T17:30Z (lnbits confirming this PR stays
  atomic-after-the-two-bucket-A PRs)
- ~/dev/coordination/webapp-design-questions.md Q1.2 + Q5.1
- Parent initiative: aiolabs/lnbits#9 (signer abstraction / bunker)
- Sibling PRs (stacked base→head): #82 → #83 → this

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/api/lnbits.ts

@@ -40,8 +40,12 @@ interface User {
   username?: string
   email?: string
   pubkey?: string
-  // pragma: allowlist secret
+  // The `prvkey` field was removed from this interface as the final step of
-  prvkey?: string  // Nostr signing key for user
+  // phase-1 per aiolabs/lnbits#9 / design-questions Q1.2 Option (b). LNbits
+  // signs server-side via the NostrSigner abstraction (PR #26) and exposes
+  // `signer_type` instead of raw key material on /api/v1/auth. Bucket-B
+  // sign-sites (kind 1 / 4 / 5 / 7 / 31925 / 10003 / 1111 etc.) migrate to
+  // POST /api/v1/auth/sign-event (PR #29) in phase 2.
   external_id?: string
   extensions: string[]
   wallets: Wallet[]
@@ -112,12 +116,29 @@ export class LnbitsAPI extends BaseService {
 
     if (!response.ok) {
       const errorText = await response.text()
+      // Try to surface FastAPI's `{"detail": "..."}` shape; fall back to raw
+      // body for non-JSON errors. Without this, every backend error renders
+      // as a generic "API request failed: <status>" and you can't distinguish
+      // "wrong endpoint" from "expired token" from "validation failure".
+      let detail: string = errorText
+      try {
+        const parsed = JSON.parse(errorText)
+        if (parsed && typeof parsed.detail === 'string') {
+          detail = parsed.detail
+        } else if (parsed && Array.isArray(parsed.detail)) {
+          // pydantic ValidationError: take the first msg
+          detail = parsed.detail[0]?.msg ?? errorText
+        }
+      } catch {
+        // body wasn't JSON; keep the raw text in `detail`
+      }
       console.error('LNBits API Error:', {
+        endpoint,
         status: response.status,
         statusText: response.statusText,
-        errorText
+        detail,
       })
-      throw new Error(`API request failed: ${response.status} ${response.statusText}`)
+      throw new Error(`LNbits ${endpoint} ${response.status}: ${detail || response.statusText}`)
     }
 
     const data = await response.json()
@@ -157,20 +178,22 @@ export class LnbitsAPI extends BaseService {
   async getCurrentUser(): Promise<User> {
     // First get basic user info from /auth
     const basicUser = await this.request<User>('/auth')
-    
+
-    // Then get Nostr keys from /auth/nostr/me (this was working in main branch)
+    // /auth/nostr/me used to return the user's prvkey for client-side signing;
+    // post-aiolabs/lnbits#9 phase-1 the server signs and the endpoint returns
+    // only the pubkey. We keep the call to merge the pubkey (which the basic
+    // /auth response also includes on the post-cascade server; this is the
+    // belt-and-suspenders fallback for older lnbits revisions until we ship a
+    // signer_type-aware client).
     try {
       const nostrUser = await this.request<User>('/auth/nostr/me')
-      
+
-      // Merge the data - basic user info + Nostr keys
       return {
         ...basicUser,
         pubkey: nostrUser.pubkey,
-        prvkey: nostrUser.prvkey
       }
     } catch (error) {
-      console.warn('Failed to fetch Nostr keys, returning basic user info:', error)
+      console.warn('Failed to fetch Nostr pubkey from /auth/nostr/me, returning basic user info:', error)
-      // Return basic user info without Nostr keys if the endpoint fails
       return basicUser
     }
   }
@@ -186,8 +209,12 @@ export class LnbitsAPI extends BaseService {
   }
 
   async updateProfile(data: Partial<User>): Promise<User> {
-    return this.request<User>('/auth/update', {
+    // aiolabs/lnbits PR #26 (gap-fill 869f67c3) wired
-      method: 'PUT',
+    // _publish_nostr_metadata_event into PATCH /api/v1/auth
+    // (auth_api.py:546). The legacy PUT /auth/update route does not
+    // exist on the post-cascade server.
+    return this.request<User>('/auth', {
+      method: 'PATCH',
       body: JSON.stringify(data),
     })
   }

src/modules/activities/components/CreateActivityDialog.vue

@@ -16,8 +16,8 @@ import { Button } from '@/components/ui/button'
 import { CalendarPlus } from 'lucide-vue-next'
 import { useAuth } from '@/composables/useAuthService'
 import { tryInjectService, SERVICE_TOKENS } from '@/core/di-container'
-import type { ActivitiesNostrService } from '../services/ActivitiesNostrService'
+import type { TicketApiService } from '../services/TicketApiService'
-import type { CalendarTimeEvent } from '../types/nip52'
+import type { CreateEventRequest } from '../types/ticket'
 import type { ActivityCategory } from '../types/category'
 import CategorySelector from './CategorySelector.vue'
 import LocationPicker from './LocationPicker.vue'
@@ -67,56 +67,64 @@ const form = useForm({
 const isFormValid = computed(() => form.meta.value.valid)
 
 const onSubmit = form.handleSubmit(async (values) => {
-  const nostrService = tryInjectService<ActivitiesNostrService>(SERVICE_TOKENS.ACTIVITIES_NOSTR_SERVICE)
+  const ticketApi = tryInjectService<TicketApiService>(SERVICE_TOKENS.TICKET_API)
-  if (!nostrService) {
+  if (!ticketApi) {
     toast.error('Activities service not available')
     return
   }
 
-  const signingKey = currentUser.value?.prvkey
+  const invoiceKey = currentUser.value?.wallets?.[0]?.inkey
-  if (!signingKey) {
+  if (!invoiceKey) {
-    toast.error('Signing key not available. Please log in again.')
+    toast.error('No wallet available. Please log in first.')
     return
   }
 
   isPublishing.value = true
 
   try {
-    // Build unix timestamps
+    // Compose ISO 8601 datetime strings the events extension parses.
-    const startTimestamp = Math.floor(new Date(`${values.startDate}T${values.startTime}`).getTime() / 1000)
+    const startIso = `${values.startDate}T${values.startTime}`
-    let endTimestamp: number | undefined
+    const endIso =
-    if (values.endDate && values.endTime) {
+      values.endDate && values.endTime
-      endTimestamp = Math.floor(new Date(`${values.endDate}T${values.endTime}`).getTime() / 1000)
+        ? `${values.endDate}T${values.endTime}`
+        : undefined
+
+    // Fold summary + description into `info` since the events extension
+    // CreateEventRequest has no separate summary field.
+    const info =
+      values.summary && values.description
+        ? `${values.summary}\n\n${values.description}`
+        : values.description || values.summary || ''
+
+    // Ticket-less activity — amount_tickets and price_per_ticket both
+    // pinned at 0 (events extension treats 0 as "unlimited / not
+    // ticketed" per models.py:45-46). Server-side `signer.sign_event`
+    // produces the kind-31922 calendar event and publishes via the
+    // operator's configured relays — no webapp signing path needed.
+    const eventData: CreateEventRequest = {
+      name: values.title,
+      info,
+      event_start_date: startIso,
+      event_end_date: endIso,
+      location: location.value || null,
+      banner: values.image || null,
+      categories: selectedCategories.value,
+      amount_tickets: 0,
+      price_per_ticket: 0,
     }
 
-    // Generate a unique d-tag
+    await ticketApi.createEvent(eventData, invoiceKey)
-    const dTag = `${Date.now()}-${Math.random().toString(36).slice(2, 8)}`
 
-    const eventData: Partial<CalendarTimeEvent> = {
+    // Approval workflow caveat: non-admin users on instances with
-      dTag,
+    // `auto_approve=false` (the default) land in the proposal queue;
-      title: values.title,
+    // their event isn't published to relays until an admin approves.
-      summary: values.summary || undefined,
+    // Admins-and-auto-approve-on instances publish immediately.
-      content: values.description,
+    toast.success('Activity created!')
-      image: values.image || undefined,
+    emit('created')
-      start: startTimestamp,
+    handleClose()
-      end: endTimestamp,
-      startTzid: Intl.DateTimeFormat().resolvedOptions().timeZone,
-      location: location.value || undefined,
-      hashtags: selectedCategories.value,
-    }
-
-    const result = await nostrService.publishCalendarEvent(eventData, signingKey)
-
-    if (result.success > 0) {
-      toast.success(`Activity published to ${result.success} relay${result.success > 1 ? 's' : ''}`)
-      emit('created')
-      handleClose()
-    } else {
-      toast.error('Failed to publish to any relay')
-    }
   } catch (err) {
-    console.error('Failed to publish activity:', err)
+    console.error('Failed to create activity:', err)
-    toast.error(err instanceof Error ? err.message : 'Failed to publish activity')
+    toast.error(err instanceof Error ? err.message : 'Failed to create activity')
   } finally {
     isPublishing.value = false
   }

src/modules/activities/services/ActivitiesNostrService.ts

@@ -1,12 +1,10 @@
 import { BaseService } from '@/core/base/BaseService'
-import { finalizeEvent, type Event as NostrEvent, type EventTemplate } from 'nostr-tools'
+import type { Event as NostrEvent } from 'nostr-tools'
 import type { SubscriptionConfig } from '@/modules/base/nostr/relay-hub'
 import {
   NIP52_KINDS,
   parseCalendarTimeEvent,
   parseCalendarDateEvent,
-  buildCalendarTimeEventTags,
-  type CalendarTimeEvent,
 } from '../types/nip52'
 import {
   calendarTimeEventToActivity,
@@ -28,7 +26,15 @@ export interface CalendarEventFilters {
 }
 
 /**
- * Service for subscribing to and publishing NIP-52 Calendar Events via RelayHub.
+ * Service for subscribing to NIP-52 Calendar Events via RelayHub.
+ *
+ * Publishing kind-31922 calendar events lives server-side in the
+ * `aiolabs/events` LNbits extension (signer-abstraction branch, commit
+ * 66076d6) — `POST /events/api/v1/events` constructs and signs the
+ * event via NostrSigner and broadcasts it to the operator's configured
+ * relays. The webapp constructs only the request payload; see
+ * CreateActivityDialog for the flow.
+ *
  * Extends BaseService for standardized dependency injection and lifecycle.
  */
 export class ActivitiesNostrService extends BaseService {
@@ -105,32 +111,6 @@ export class ActivitiesNostrService extends BaseService {
     return activities
   }
 
-  /**
-   * Publish a NIP-52 time-based calendar event.
-   * Requires an authenticated user with a signing key.
-   */
-  async publishCalendarEvent(
-    eventData: Partial<CalendarTimeEvent>,
-    signingKeyHex: string
-  ): Promise<{ success: number; total: number }> {
-    if (!this.relayHub) {
-      throw new Error('RelayHub not available')
-    }
-
-    const tags = buildCalendarTimeEventTags(eventData)
-    const template: EventTemplate = {
-      kind: NIP52_KINDS.CALENDAR_TIME_EVENT,
-      created_at: Math.floor(Date.now() / 1000),
-      content: eventData.content ?? '',
-      tags,
-    }
-
-    const privkeyBytes = hexToUint8Array(signingKeyHex)
-    const signedEvent = finalizeEvent(template, privkeyBytes)
-
-    return await this.relayHub.publishEvent(signedEvent)
-  }
-
   /**
    * Parse a raw Nostr event into an Activity view model.
    */
@@ -179,11 +159,3 @@ export class ActivitiesNostrService extends BaseService {
     this.activeUnsubscribes = []
   }
 }
-
-function hexToUint8Array(hex: string): Uint8Array {
-  const bytes = new Uint8Array(hex.length / 2)
-  for (let i = 0; i < hex.length; i += 2) {
-    bytes[i / 2] = parseInt(hex.substr(i, 2), 16)
-  }
-  return bytes
-}

src/modules/base/auth/auth-service.ts

@@ -180,17 +180,14 @@ export class AuthService extends BaseService {
       this.isLoading.value = true
       const updatedUser = await this.lnbitsAPI.updateProfile(data)
 
-      // Preserve prvkey and pubkey from existing user since /auth/update doesn't return them
+      // Preserve pubkey from existing user since /auth/update doesn't return it.
+      // Kind-0 metadata is published server-side by lnbits's PATCH /auth handler
+      // (aiolabs/lnbits commit 869f67c3); no webapp-side broadcast path remains.
       this.user.value = {
         ...updatedUser,
         pubkey: this.user.value?.pubkey || updatedUser.pubkey,
-        prvkey: this.user.value?.prvkey || updatedUser.prvkey
       }
 
-      // Kind-0 metadata is published server-side by lnbits's PATCH /auth handler
-      // (aiolabs/lnbits commit 869f67c3) once the cascade is deployed. The webapp
-      // no longer maintains its own broadcast path.
-
     } catch (error) {
       const err = this.handleError(error, 'updateProfile')
       throw err

src/modules/nostr-feed/components/NostrFeed.vue

@@ -18,7 +18,7 @@ import ThreadedPost from './ThreadedPost.vue'
 import ScheduledEventCard from './ScheduledEventCard.vue'
 import appConfig from '@/app.config'
 import type { ContentFilter, FeedPost } from '../services/FeedService'
-import type { ScheduledEvent } from '../services/ScheduledEventService'
+import type { ScheduledEvent } from '@/modules/tasks/services/TaskService'
 import { injectService, SERVICE_TOKENS } from '@/core/di-container'
 import type { AuthService } from '@/modules/base/auth/auth-service'
 import type { RelayHub } from '@/modules/base/nostr/relay-hub'

src/modules/nostr-feed/components/ScheduledEventCard.vue

@@ -17,7 +17,7 @@ import {
   CollapsibleTrigger,
 } from '@/components/ui/collapsible'
 import { Calendar, MapPin, Clock, CheckCircle, PlayCircle, Hand, Trash2 } from 'lucide-vue-next'
-import type { ScheduledEvent, EventCompletion, TaskStatus } from '../services/ScheduledEventService'
+import type { ScheduledEvent, EventCompletion, TaskStatus } from '@/modules/tasks/services/TaskService'
 import { injectService, SERVICE_TOKENS } from '@/core/di-container'
 import type { AuthService } from '@/modules/base/auth/auth-service'