Track upstream Lineage deletion and subagent scrolling fixes #55

Track upstream submissions for two fixes already carried by this fork:

• Deleted fork references remain as UUID rows in Lineage: fork commit af705cb025, following the title lookup in 4e76a1272d. The upstream branch is prepared separately; its substantial-fix PR will wait for upstream maintainer triage of the bug and intended behavior.
• Subagent lists trap wheel scrolling inside the details panel: fork commit 96f3bdddc4. The upstream branch has one production containment-class deletion and native-wheel regression cases.

These are separate upstream submissions under the one-problem-per-PR policy. This issue records their progress and hosts public synthetic evidence because GitHub's native media upload requires push access to the hosting repository. No private conversation, original user screenshot, live database or real agent turn is included.

Prepared against upstream fa31b66bbb2ae5234205a8628a78e038d917202f. Both branches passed vp run check:changed and relevant React Compiler cases. Regression tests reproduce each upstream failure and pass with the fixes. Independent review was clean for scrolling; its archived-title finding on the deleted-fork branch was resolved with regression coverage. The integrated Browser panel reported unavailable; these captures use actual panel components, application CSS and Chromium with synthetic data.

Deleted forks

Before: a deleted endpoint is reconstructed from retained context-transfer history as a UUID row. The existing fork remains present.

After: the confirmed-deleted endpoint disappears while the existing fork stays reachable. Historical subagent records and transfer history are preserved.

Wheel scrolling over subagents

Before: downward wheel input over the inner list leaves the outer panel stationary.

After: the same input reaches the enclosing panel.

Recordings show native expansion and wheel input. Both clips are cropped to the fixture, slowed 12x for readability, and hold their final frame for two seconds. The before/after test uses the same fixture and input.

Before:

After:

Scrolling submitted as pingdotgg/t3code#28968, commit 7c73126e1f367d1df22756e02a2770ca5bd401d6. Independent Sol xhigh review was clean; final local check:changed and the focused compiler case passed. Upstream CI and review are running.

Deleted forks reported as pingdotgg/t3code#28978, with the prepared fix/upstream-deleted-lineage branch, commit 7d58d6caa2, and a complete upstream comparison. Final local checks passed: 105 tests, all 35 affected-package typechecks, format, lint, both knip checks, GraphQL generation, and explicit relevant compiler cases. All 15 component browser cases pass, including stale archived and live title precedence. The substantial PR is awaiting maintainer triage of the failure and intended behavior under upstream's contribution policy.