[Ambisphaeric]

Closes #242

Why

Copying values out of the HUD is a core workflow. A native selection (double-click, drag, select-all) was capturing row decorations along with the value — e.g. a summary line yielding <value>.<why-line>. Copy must yield the fully realized value and nothing else.

A. Selection hygiene (headline)

The block renderer already isolates every decoration in its own classed span; the only user-select:none rule was the .hudtop drag handle. This adds user-select:none (+ -webkit- prefix) to every decoration class across styles.ts and panel-styles.ts (why lines, mark glyphs, kind/ext tags, micro-state dot, moment time/glyph, unanswered tag, block/section headers, live-transcript chrome, citations/role/status/attachment lines, glyph + clarify + session-control + notetaker-nav affordances). Value text stays selectable by inheriting the default (entity/moment/summary/todo/draft/transcript/field text, chat messages, transcript utterances). The separating space in relevant-now / pinned-doc titles moved inside the non-selectable .ext span so a selection has no trailing separator.

Regression test (selection-hygiene.test.ts): a vnode-level test that DERIVES the non-selectable classes from the actual stylesheet string (not a hardcoded list), walks a rendered relevant-now / todos / distillates row collecting the text a selection would keep, and asserts it equals the bare value. Includes explicit contract assertions on the relied-on classes and a by-construction negative probe (drop the .why suppression → the why line rejoins the selection).

B. Voice-slop strings (before → after)

• distillates label: Transcript · distillate stream → Transcript; row why distilled from capture → from what was captured (banned "distillate/distilled" vocabulary)
• fields label: Fields · fast → Fields (internal lane/tier name)
• ask placeholder why: ask this context — recall path P3 → ask about what is here (roadmap phase)
• custom placeholder why: sandboxed custom block — P6 → a self-contained custom block (roadmap phase)
• transcript-inspector retention why: …ephemeral fast-path (#58); the durable stream is the distillate block → …ephemeral fast-path; the durable stream lives in the Transcript block (tracker ref + banned vocabulary)
• chat catch-all: raw error.message under the input → calm line Couldn't answer — the engine returned an error. with the raw message on the hover title (same detail-on-inspection pattern as calmChatStatus)
• chat screen-capture exception passthrough: raw error.message → screen capture did not respond
• citations line: raw chunk ordinal #N for pageless sources → the source's human title (deduped); page anchors (p.3) unchanged
• summaries degraded row: suppressed the copy affordance entirely (was a live Copy button carrying an empty-string payload)

C. Fully-realized copy value

EntityKind is closed (person | artifact | topic) — there is no link/url entity kind. A link surfaces as an artifact entity whose name is the model-extracted surface form (index/extract.ts trims it; no URL parsing/normalization), and Entity has no separate canonical-URI field (external.url exists but no current producer populates it). So row.entity.name already is the value the entity carries — no richer field to prefer; the existing relevant-now copy-payload test still pins it. Genuine URL documents carry the full canonical URI as pin.uri, and the pinned-doc block already copies pin.uri (full) with pin.title as the display form. Added a url-kind pinned-doc test pinning copy = the full canonical URL (scheme + host + path + query), negative-guarding the display title, decoration, and a bare-domain shortening.

Gates (Node 22)

pnpm -r build green; pnpm -r test green (contracts 114, fixtures 15, client 620, engine 1105); schema regen zero drift (gen then git diff clean under shared/contracts/schemas).

Deliberately not changed

• The hint block's inline label prefix: .hk and the duplicate .copybar preview are suppressed, but the inline excerpt (a value) stays selectable; hint is on-match and rarely shown, and its primary copy path is its button. Left minimal to avoid scope creep.
• Diagnostics-tier machine detail (stt slot endpoint/model lines, queue failure class/endpoint) kept — diagnostics may carry machine detail; only the tracker reference was removed.