replay ui fix (#56)

* refactor: rename inspect to replay across the codebase

Renames inspect-ui/ to replay-ui/, internal/inspect/ to internal/replay/,
the CLI subcommand from `sanderling inspect` to `sanderling replay`, and
updates all references in docs, Makefile, README, and Go comments.

* feat(replay-ui): show spec filename with full path on hover

RunList and RunDetail now render the basename of spec_path (e.g.
login.spec.ts) with the full path available as a title tooltip.

docs/manual/getting-started.md

@@ -92,6 +92,6 @@ runs/2026-04-18T12-34-56/
 └── meta.json
 ```
 
-Browse it with `sanderling inspect` (see [inspect](./inspect/)), or read `trace.jsonl` step by step.
+Browse it with `sanderling replay` (see [replay](./replay/)), or read `trace.jsonl` step by step.
 
 Next: [writing specs](./writing-specs/).