Bundles the error-UX overhaul and the inline log viewer:
- New `FaiLog` (`~/.fai/logs/studio-errors.log`, 256 KiB rotation,
JSON-per-line). Every operator-visible failure is appended so
`fai admin doctor` and the new viewer can show the trail
without the operator having to reproduce the failure.
- New `showFaiErrorSnack` / `showFaiErrorDialog` helpers wrap
`FaiErrorBox` in copyable surfaces; 27 ad-hoc
`SnackBar(content: Text(e.toString()))` sites swept to use
them (settings, doctor, audit, store, module sheet, system-AI
editor, flow output).
- New `FaiLogViewer` modal (`showFaiLogViewer`) renders log
files inline with line numbers, JSON-key + `[level]` token
colouring, Copy-all, Refresh, Open-externally. Doctor's
daemon-paths panel grows a "View" button next to "Open" for
every `.log` row and now also lists the Studio errors log.
- Today carousel: CTAs now actually re-run search after a
`filterCategory` / `runQuery` story is tapped (was only
flipping the chip state). Fallback story list bumped to 8.
- Editor bumped to git ref carrying 0.15.0 (type-token
colouring + analyzer diagnostics).
Studio bumped to 0.62.0.
Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>
