Add Nostr share note publishing

docs/nostr-event-schemas.md

@@ -16,6 +16,7 @@ import {
   setNostrEventSchemaOverrides,
   buildVideoPostEvent,
   buildRepostEvent,
+  buildShareEvent,
   buildProfileMetadataEvent,
 } from "./nostrEventSchemas.js";
 
@@ -147,6 +148,7 @@ import { updateWatchHistoryListWithDefaultClient } from "./nostrWatchHistoryFaca
 | Video post (`NOTE_TYPES.VIDEO_POST`) | `30078` | `['t','video']`, `['d', <stable video identifier>]` plus optional schema append tags | JSON payload using Content Schema v3 (`version`, `title`, optional `url`, `magnet`, `thumbnail`, `description`, `mode`, `videoRootId`, `deleted`, `isPrivate`, `isNsfw`, `isForKids`, `enableComments`, `ws`, `xs`) |
 | NIP-94 mirror (`NOTE_TYPES.VIDEO_MIRROR`) | `1063` | Tags forwarded from `publishVideo` (URL, mime type, thumbnail, alt text, magnet) | Plain text alt description |
 | Repost (`NOTE_TYPES.REPOST`) | `6` | `['e', <event id>, <relay?>]` with optional address pointer `['a', <kind:pubkey:identifier>, <relay?>]`, and `['p', <pubkey>]` when the origin author is known; inherits schema append tags | JSON-serialized event being reposted |
+| Share note (`NOTE_TYPES.SHARE`) | `1` | `['e', <video id>, '', 'mention']` plus `['p', <video pubkey>, '', 'mention']` when available; repeating `['r', <relay url>, <read/write?>]` tags for relay hints; inherits schema append tags | Plain text share content from the compose modal |
 | Video reaction (`NOTE_TYPES.VIDEO_REACTION`) | `7` | `['e', <event id>, <relay?>]` or `['a', <kind:pubkey:identifier>, <relay?>]`, and `['p', <author pubkey>]` | Reaction content (e.g. `+`, `-`, or emoji) |
 | Video comment (`NOTE_TYPES.VIDEO_COMMENT`) | `1111` | NIP-22 root scope tags `['A'\|`E`\|`I`, <pointer>, <relay?>?], `['K', <root kind>]`, and `['P', <root author pubkey>, <relay?>?]` plus parent metadata `['E'\|`I`, <parent pointer>, <relay?>?, <author?>], `['K', <parent kind>]`, `['P', <parent author>, <relay?>?]`; inherits schema append tags | Plain text body sanitized to valid UTF-8 |
 | DM attachment (`NOTE_TYPES.DM_ATTACHMENT`) | `15` | `['p', <recipient pubkey>]`, `['x', <sha256 of uploaded bytes>]`, `['url', <download url>]`, optional `['name', <filename>]`, `['type', <mime>]`, `['size', <bytes>]`, optional `['k', <base64 key>]`; inherits schema append tags | Empty content; attachment metadata is represented as tags |