Introduced `Sources` as an accessible Content Collection

Introduce Sources as Accessible Content Collection

Summary

Added the sources content collection to the site, enabling 209 markdown files containing reference materials, books, people, media, and other sources to be rendered and browsable through the site.

Why Care?

A flexible sources collection allows for Backlinks to an aggregation of Media, Influencers, People, Books, and UGC Communities that we can reference in other content.

Changes

Content Collection (`src/content.config.ts`)

Added sourcesCollection with ultra-permissive schema using .nullish() to handle varied frontmatter including null values
Schema accepts: title, og_title, url, date_created, date_modified, tags, publish (all optional/nullable)
Uses .passthrough() for any additional frontmatter fields
generateId preserves directory structure (e.g., Books/Atomic Design.md → books/atomic design)

Route Configuration

src/utils/routing/routeManager.ts

Added route mapping: { contentPath: 'sources', routePath: 'sources' }
Enables backlink resolution for [[sources/...]] links

src/utils/routePaths.ts

Added SOURCES: { BASE: '/sources' } constant

New Pages

src/pages/sources/[...slug].astro

Dynamic route handler for all source entries
Title fallback chain: title → og_title → filename (with proper casing)
Graceful error handling: logs issues but doesn't fail build
Preserves directory structure in URLs

src/pages/sources/index.astro

Tabbed index page for browsing sources by category
10 folder tabs: Books, Brand Content, Events, Lectures, Media, Meetings, People, Reports, Source Extracts, UGC Communities
Plus "Uncategorized" tab for root-level files
Client-side filtering with entry counts per tab
Responsive design

Technical Details

URL Structure

Content Path	Site URL
`sources/OpenAlternative.md`	`/sources/openalternative`
`sources/Books/Atomic Design.md`	`/sources/books/atomic-design`
`sources/Media/Harvard Business Review.md`	`/sources/media/harvard-business-review`
`sources/Events/2025 Kauffman Summit.md`	`/sources/events/2025-kauffman-summit`

Backlink Resolution

Backlinks now resolve correctly:

[[sources/OpenAlternative]] → /sources/openalternative
[[Sources/Open Alternative]] → /sources/open-alternative
[[sources/Brand Content/Some File]] → /sources/brand-content/some-file

Normalization handled by existing transformContentPathToRoute() → getReferenceSlug() → slugify() chain.

Build Results

209 source pages generated
Build time: ~60 seconds
No critical errors

Files Changed

text

Modified:
  src/content.config.ts
  src/utils/routing/routeManager.ts
  src/utils/routePaths.ts

Created:
  src/pages/sources/[...slug].astro
  src/pages/sources/index.astro