fix(components): gate the archived row's PR badge on the githubIntegration capability

[pythonlearner1025]

An archived session carries pullRequests whatever platform is reading it, so
the archive row draws a PR status glyph linking to github.com on a composition
that declares no githubIntegration and has no GitHub App behind the link.
useAppCapability('githubIntegration') is the check the Session surfaces make;
the archive row simply never asked.

getArchivedSessionItemViewModel gains a third parameter defaulting to true, and
drops the pull-request list with the capability off — which zeroes prUrl,
prStatusMeta, PrIcon and prTooltipLabel together, the same shape
getSessionGitHubState uses. Both item components read the capability and pass
it.

No new prop and no new capability.

Compatibility

Every change is additive at its default. With the new prop, parameter or flag
absent, the touched components render and behave exactly as they do today, and
no existing call site in this repository passes one.

Testing

packages/components typecheck and the full vitest suite pass. No new test: getArchivedSessionItemViewModel is module-private, so the assertion would have to go through a rendered row. Exporting it for a test is a change this PR did not want to make on its own; say the word and it can.

Notes for the reviewer

Same shape as the getSessionGitHubState gate in the Session surfaces, applied to the one row family that never asked.

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Review metadata

BlitzOS fork only. Delete this section before sending the PR to LodyAI/Lody.

Branch	blitz/seam-14-archive-pr-badge-capability-gate
Branched from	f3474894 (the pinned upstream commit)
Classification	A — upstream bug fix
Suggested submit priority	P2
Vendor seam patch	14 (capability half)

.../components/src/components/archive/archive-view.tsx | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)