feat: add all missing changelogs

[AnishSarkar22]

Description

• Added missing changelogs
• Removed breadcrumbs from homepage
• Fixed chat suggestion section

Motivation and Context

FIX #

Screenshots

API Changes

• This PR includes API changes

Change Type

• Bug fix
• New feature
• Performance improvement
• Refactoring
• Documentation
• Dependency/Build system
• Breaking change
• Other (specify):

Testing Performed

• Tested locally
• Manual/QA verification

Checklist

• Follows project coding standards and conventions
• Documentation updated as needed
• Dependencies updated as needed
• No lint/build errors or new warnings
• All relevant tests are passing

High-level PR Summary

This PR adds missing changelog entries for versions 0.0.19 through 0.0.26 and refactors the changelog system. The changelog page and schema were redesigned to use a new ChangelogTimeline component, removing breadcrumb navigation from multiple pages, simplifying existing changelog entries by removing titles, descriptions, and tags while converting accordion-based sections into simple markdown headings, and updating the blog search placeholder text.

⏱️ Estimated Review Time: 30-90 minutes

💡 Review Order Suggestion

Order	File Path
1	surfsense_web/source.config.ts
2	surfsense_web/components/ui/changelog-timeline.tsx
3	surfsense_web/app/(home)/changelog/page.tsx
4	surfsense_web/app/(home)/changelog/loading.tsx
5	surfsense_web/changelog/content/2025-12-24.mdx
6	surfsense_web/changelog/content/2026-01-08.mdx
7	surfsense_web/changelog/content/2026-01-26.mdx
8	surfsense_web/changelog/content/2026-02-09.mdx
9	surfsense_web/changelog/content/2026-03-31.mdx
10	surfsense_web/changelog/content/2026-04-08.mdx
11	surfsense_web/changelog/content/2026-04-16.mdx
12	surfsense_web/changelog/content/2026-04-21.mdx
13	surfsense_web/changelog/content/2026-05-03.mdx
14	surfsense_web/changelog/content/2026-05-04.mdx
15	surfsense_web/changelog/content/2026-05-05.mdx
16	surfsense_web/changelog/content/2026-05-06.mdx
17	surfsense_web/changelog/content/2026-05-20.mdx
18	surfsense_web/changelog/content/2026-05-21.mdx
19	surfsense_web/changelog/content/2026-05-31.mdx
20	surfsense_web/app/(home)/blog/[slug]/page.tsx
21	surfsense_web/app/(home)/blog/[slug]/loading.tsx
22	surfsense_web/app/(home)/blog/blog-magazine.tsx
23	surfsense_web/app/(home)/free/[model_slug]/page.tsx
24	surfsense_web/app/(home)/free/[model_slug]/loading.tsx
25	surfsense_web/app/(home)/free/page.tsx
26	surfsense_web/app/(home)/free/loading.tsx
27	surfsense_web/app/(home)/pricing/page.tsx

⚠️ Inconsistent Changes Detected

File Path	Warning
surfsense_web/app/(home)/blog/[slug]/page.tsx	Removes BreadcrumbNav component from blog pages, which is unrelated to adding changelogs
surfsense_web/app/(home)/blog/[slug]/loading.tsx	Removes breadcrumb skeleton from blog loading state, unrelated to changelog additions
surfsense_web/app/(home)/blog/blog-magazine.tsx	Changes search placeholder text from 'Search by title or topic…' to 'Search', unrelated to changelog work
surfsense_web/app/(home)/free/[model_slug]/page.tsx	Removes BreadcrumbNav from free model pages, unrelated to adding changelogs
surfsense_web/app/(home)/free/[model_slug]/loading.tsx	Removes breadcrumb skeleton from free model loading state, unrelated to changelogs
surfsense_web/app/(home)/free/page.tsx	Removes BreadcrumbNav from free hub page, unrelated to adding changelogs
surfsense_web/app/(home)/free/loading.tsx	Removes breadcrumb skeleton from free chat loading state, unrelated to changelogs
surfsense_web/app/(home)/pricing/page.tsx	Removes BreadcrumbNav from pricing page, unrelated to adding changelogs

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@AnishSarkar22 is attempting to deploy a commit to the Rohan Verma's projects Team on Vercel.

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