Reading surface: memory detail with author header, related memories, timeline, Copy-ID

[ajianaz]

Requires uteke: v0.16.0+ · Epic: #289

What

• Memory detail panel rebuilt as a reading surface: author header (identity color + name + time), content typography (65ch measure, 1.6 line-height), tags/pinned/importance summary, full event timeline (/timeline).
• Related memories: score-bar list via /recall seeded from this memory's content (parity with uteke-mobile flagship pattern) + graph neighbors where present.
• Copy-ID disclosure (first 8 chars + copy button) replacing raw UUID line.

Why

Corin's core loop is reading what agents write; related-memories explains why this matters (transparency P37/P38) and is the proven hero pattern from mobile.

Testing

• E2E: open detail → related list populated, copy-ID works, timeline renders.
• Visual QA: contrast AA, both themes.