Red commit: `c165087` ([CI assertion
failure](https://github.com/Kpa-clawbot/CoreScope/actions/runs/36644030012)).
Fixes#2091.
Packet detail links now retain the selected observation when page
initialization or filter changes rebuild the URL. Initialization also
restores `obs` from the complete hash after the router strips its query.
Explicit ID links render the requested observation and retain it in Copy
Link state.
The shared updater reads selection from the current route, so returning
to the list or selecting another packet cannot resurrect an old
observation. Existing filter serialization and Clear Filters behavior
remain intact. No new requests, configuration, dependencies or layout
changes.
## Validation
- Real fixture browser checks use nondefault observation 502: hash/ID
load, type/observer/time-window changes, refresh, Clear, and another
refresh. Both URL and selected row are asserted.
- All 183 standalone frontend suites passed; focused filter browser
suite 11/11.
- Broader local core run reached the unrelated Live input readiness bug
#2094, reproduced on unchanged master. The complete CI browser suite
passed.
- ESLint 8: zero errors; 91 existing warnings. XSS diff, syntax and
whitespace checks passed.
- Three independent reviews found no production defects; assertions
additionally prove filter controls changed before checking selection.
E2E assertion added: `tests/e2e/test-filter-ux-e2e.js:179`.
OpenClaw profile/external preflight were unavailable; Chromium and
repository checks ran directly. Local navigation used a 60-second
budget. Final CI passed at `280ced5`, including Go, browsers, coverage
and both container architectures
([run](https://github.com/Kpa-clawbot/CoreScope/actions/runs/36646175352)).
n30nex
f1edbbef3f
