Revised landing page, brand icons and social preview

[manuelgeek]

Ports the revised landing page from droidconKE with flutter branding and copy, and refreshes the app icons and social preview from the new square/cover art.

Targets feat/home-redesign-plan, per the branching note in the redesign plan.

There is no separate Figma for the flutter landing page, so this mirrors the droidcon layout. droidconKE stays the source of truth for structure; section 9 of the redesign plan records that.

Landing page

• Hero — "Beyond Stacks" as live gradient text over the Spline cube, on the flutter ramp (#008BFF → #F73EDE) rather than droidcon's. The theme line itself is deliberately identical across both sites.
• Event Types → "2026 Conf. Essentials" — gradient card plus the "More Stacks. All Mobile." strip.
• New "Conf. Highlights" — Beyond the Sessions and Developer Days, mirrored layouts.
• Sponsors — platinum, then gold, then everything else ordered silver/bronze/snack, centre-biasing when there are only a few.
• Community Partners reduced to the accent card; footer rebuilt on the KICC halftone with logo-light.svg / logo-dark.svg as the wordmark.

Editions

3RD · ANNUAL, with stats reading 3RD FLUTTERCON EDITION and 7TH DROIDCON EDITION. Conferences read FLUTTER · DROIDCON. This also settles the droidcon count at 7TH across both repos.

Assets

fcke-square.png and fcke-cover.png are flutter-specific. Four are shared with droidconKE and byte-identical in both repos — beyond-sessions.png, dev-days.png, stacks.png, new-footer-2.png. If any is re-exported it needs updating in both places.

All app icons and favicons regenerate from fcke-square.png, including a hand-built multi-size favicon.ico. og:image and twitter:image point at fcke-cover.png, resized 4501 → 2400 because Twitter rejects summary_large_image above 4096px. PWA chrome moves off the pre-rebrand palette: theme_color was still #FFAB00 and background_color #54C4F7.

Needs review

• The Conf. Highlights copy is drafted, not designed. With no flutter design to work from, the joint-track line points at DroidconKE and "Developer Days" was rewritten around Flutter and Dart. Those words have not been approved by anyone.
• Dropped 3.6 MB of unreferenced assets.

Known gaps

• The hero cube's Spline scene is authored start-once and stops after one 30s pass — the same unresolved issue as droidconKE, documented there. It costs ~546 KB gz lazily, and removing it is a one-line change if that is not worth it here.
• Not yet checked in a real browser across both themes.