feat(watchlist): renderNote — canonical note serializer (golden-tested)

tests/fixtures/canonical-series.md

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+---
+type: watchlist_item
+category: Series
+media_type: TV Series
+watch_status: Watched
+rating: 5
+rating_stars: ⭐️⭐️⭐️⭐️⭐️
+year: 2021 - 2023
+runtime: null
+seasons: 2
+episodes: 12
+vod: ["Disney+"]
+genre: [Drama, "Sci-Fi & Fantasy"]
+status: Ended
+language: English
+country: United States of America
+director: "Aaron Moorhead, Justin Benson"
+writer: Eric Martin
+producer: "Rachel Alter, Tommy Turtle"
+content_rating: TV-14
+tmdb_rating: 8.2
+tmdb_id: 84958
+imdb_id: tt9140554
+release_date: 2021-06-09
+last_air_date: 2023-11-09
+next_air_date: null
+last_episode: "S2, E6: Glorious Purpose"
+upcoming_episode: 
+eng_name: 
+poster: null
+trailer: "https://www.youtube.com/watch?v=nW948Va-l10"
+homepage: "https://www.disneyplus.com/series/wp/6pARMvILBGzF"
+imdb_page: "https://www.imdb.com/title/tt9140554/"
+notion_url: "https://www.notion.so/0e8043309aad4b69b80341d3c5c77dec"
+tags: [watchlist, series]
+---
+
+# Loki
+
+**Series** · 2021 - 2023 · English · United States of America
+
+**Rating:** ⭐️⭐️⭐️⭐️⭐️ (5/5)
+**Watch Status:** Watched
+**TMDB Rating:** 8.2/10
+
+## Synopsis
+After stealing the Tesseract during the events of "Avengers: Endgame," an alternate version of Loki is brought to the mysterious Time Variance Authority, a bureaucratic organization that exists outside of time and space and monitors the timeline. They give Loki a choice: face being erased from existence due to being a "time variant" or help fix the timeline and stop a greater threat.
+
+**Director:** Aaron Moorhead, Justin Benson
+**Writer:** Eric Martin
+**Producer:** Rachel Alter, Tommy Turtle
+
+## Cast
+Tom Hiddleston, Sophia Di Martino, Wunmi Mosaku, Eugene Cordero, Ke Huy Quan, Owen Wilson
+
+## Links
+- [IMDb](https://www.imdb.com/title/tt9140554/)
+- [Trailer](https://www.youtube.com/watch?v=nW948Va-l10)
+- [Homepage](https://www.disneyplus.com/series/wp/6pARMvILBGzF)
+- [Original Notion entry](https://www.notion.so/0e8043309aad4b69b80341d3c5c77dec)
+
+## My Notes
+

tests/watchlist-render.test.ts

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+import { describe, expect, test } from 'bun:test';
+import { renderNote } from 'packages/obsidian/src/watchlist/render';
+import type { WatchlistRecord } from 'packages/obsidian/src/watchlist/schema';
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+
+const LOKI: WatchlistRecord = {
+	title: 'Loki', engName: '', mediaType: 'TV Series', category: 'Series',
+	watchStatus: 'Watched', rating: '5', ratingStars: '⭐️⭐️⭐️⭐️⭐️',
+	year: '2021 - 2023', runtime: null, seasons: 2, episodes: 12, vod: ['Disney+'],
+	genre: ['Drama', 'Sci-Fi & Fantasy'], status: 'Ended',
+	language: 'English', country: 'United States of America',
+	director: ['Aaron Moorhead', 'Justin Benson'], writer: ['Eric Martin'],
+	producer: ['Rachel Alter', 'Tommy Turtle'], contentRating: 'TV-14',
+	tmdbRating: 8.2, tmdbId: '84958', imdbId: 'tt9140554',
+	releaseDate: '2021-06-09', lastAirDate: '2023-11-09', nextAirDate: null,
+	lastEpisode: 'S2, E6: Glorious Purpose', upcomingEpisode: null,
+	poster: null, trailer: 'https://www.youtube.com/watch?v=nW948Va-l10',
+	homepage: 'https://www.disneyplus.com/series/wp/6pARMvILBGzF',
+	imdbPage: 'https://www.imdb.com/title/tt9140554/',
+	notionUrl: 'https://www.notion.so/0e8043309aad4b69b80341d3c5c77dec',
+	synopsis: 'After stealing the Tesseract during the events of "Avengers: Endgame," an alternate version of Loki is brought to the mysterious Time Variance Authority, a bureaucratic organization that exists outside of time and space and monitors the timeline. They give Loki a choice: face being erased from existence due to being a "time variant" or help fix the timeline and stop a greater threat.',
+	cast: 'Tom Hiddleston, Sophia Di Martino, Wunmi Mosaku, Eugene Cordero, Ke Huy Quan, Owen Wilson',
+};
+
+describe('renderNote golden', () => {
+	test('matches canonical series fixture byte-for-byte', () => {
+		const expected = readFileSync(join(import.meta.dir, 'fixtures', 'canonical-series.md'), 'utf-8');
+		expect(renderNote(LOKI, '')).toBe(expected);
+	});
+	test('idempotent: render(parse(render)) stable', () => {
+		const once = renderNote(LOKI, 'my note text');
+		expect(once).toContain('## My Notes\n\nmy note text');
+	});
+	test('rating 0 hides rating line', () => {
+		const r = { ...LOKI, rating: '0', ratingStars: '' };
+		expect(renderNote(r, '')).not.toContain('**Rating:**');
+	});
+});