fix(grunt/tui): TicketHoverCard text-rendering — clean preview lines, no character bleed - #17

… no character bleed (#17)

Refs hivemind anomalyco#233. Closes Nik feedback after PR #16: 'there is some
gibberish being added in to text' with a screenshot showing the title
rendered as '##nNikrdirective...' (jumbled) and the scope as
'clicktto,open inrhivemind-ui closed the session before' (with extra
letters and the footer-line text bleeding into the scope).

## Root cause

Three compounding issues in the card body:

1. **Multi-line scope text with wrapMode='word'** — opentui's text renderable
   joins adjacent <text> siblings when wrap-word is enabled, producing
   character bleed across line boundaries. The actual title was correct
   in the api response; the renderer was conflating it with the scope's
   first line plus the footer ('click to open in hivemind-ui') text.

2. **Markdown chars in scope** — full scope text contains markdown
   ('## Nik directive 2026-05-26T23:01Z (recovered from ses_...)') which
   the plain-text renderable was passing through verbatim, then word-wrap
   ate the spaces around '#' and '##'.

3. **<>Fragment</> wrapping the inner content** — Fragments don't
   establish a layout box; the renderable was free to flow children in
   weird ways. The position-absolute outer box wasn't enough to constrain
   line breaks per-text.

## Fix

- Wrap inner content in <box flexDirection='column'> so each <text> is
  one explicit line.
- Drop wrapMode='word' from the body; let opentui's natural per-text
  layout handle line bounds.
- Pre-flatten the scope: strip code fences, headings, emphasis markers,
  and collapse whitespace to single spaces. This makes the preview a
  proper one-paragraph blurb instead of attempting to render markdown
  inside a 60-col tooltip.
- Compute title / meta / scope-preview as plain strings before render.
- Drop the <b> wrapper around title (use attributes={1} on <text> instead,
  matching the pattern in routes/session/sidebar.tsx).

## Verified

bun typecheck clean. Local install reports
1.15.10-grunt.7+local.f9cad9dea.dirty.