Rebrand to gitlawb logo and polish the repo detail page

[kevincodex1]

Description

Bundles three UI polish changes from the same working session:

1. gitlawb branding. The header now shows the official gitlawb mark + "explorer"
(lowercase, matching the app's terminal style) instead of the text-only
"gitlawb node explorer". The mark is a new 4KB Logo component — the white glyph
path extracted from the platform's brand asset, rendered with currentColor so it
flips with the theme. The purple-bolt favicon is replaced by the mark on a black
tile, and the page title / footer now read "gitlawb explorer".

2. DID middle-truncation. The repo detail owner row rendered the full
56-character DID. New truncateDid() helper keeps the scheme prefix and shortens
the key segment to did:key:z6Mkn…xXxYk — full DID stays available on hover
(title) and in the copy button. The footer's node DID reuses it.

3. Wider content. The detail page's right stats column goes 380px → 440px with
rebalanced cells (0.9fr/1.05fr/1.05fr + nowrap date) so the commit hash and
created date no longer cramp. The README render and file markdown preview drop
their 72ch cap, and the code viewer drops its 1100px cap — all now fill the
content width, flush with the rest of the page.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that changes existing behavior)
• Refactor / code quality (no behavior change)
• Documentation
• Tests / CI

How was this tested?

• 4 new unit tests for truncateDid (prefix preserved, short keys untouched,
  prefix-less values, custom head/tail); full suite 72 tests passing.
• Driven end-to-end with Playwright against the live node:
  • Header renders the mark crisply in dark (white) and light (near-black);
    tab title reads "gitlawb explorer"; favicon SVG legible at tab scale.
  • On z6Mknr6C/dack-soul: owner row shows did:key:z6Mkn…xXxYk, hover title
    carries the full DID, and clicking copy puts the complete DID on the clipboard
    (verified via granted clipboard permission).
  • Stats cells and sub-labels single-line at 1440px and 1024px (narrowest
    two-column width); DID fits unclipped at 390px mobile.
  • README measured 605px → 1134px wide; code viewer fills the 1184px container.
• npm run lint, npm test, npm run build all pass.

S

creenshots

Checklist

• npm run lint passes
• npm test passes
• npm run build passes (includes typecheck)
• New logic in src/lib/ has colocated unit tests
• I kept the change focused on a single concern — deliberately bundles three
  small polish changes; happy to split if preferred