[rusty4444]

Summary

• Share concurrent Home first-page requests and full session scans, including Home refreshes and Activity title reads.
• Avoid starting a second full scan from a superseded or delayed progressive refresh.
• Clear in-flight references on success or failure so subsequent refreshes still see new sessions.
• Add a widget regression for overlapping refreshes and later re-fetch.

Partially addresses #149 (app-side overlapping session refreshes). This does not implement a server cursor, transcript-tail delta, durable /v1/runs transport, WebSocket capability contract, or server compression. Those require separate contracts or tests; the issue should remain open.

Verification

• flutter test --no-pub: 1,338 tests passed
• flutter analyze --no-pub lib/core/screens/workspace_screen.dart test/workspace_home_progressive_test.dart: no issues
• git diff --check: clean

Please test the request counts on a real v2.1.23+ gateway before claiming a transfer-volume reduction.

[rusty4444]

Reviewed the session-refresh coalescing and added a regression for a new chat appearing after a shared full scan started. The newer first page now survives that older scan's completion on both Home and Chats. PR CI passed; locally, full analysis and 1,338 tests passed. The combined tree with PR #152 passed analysis and 1,364 tests. This only partially addresses #149; that issue stays open pending transfer measurement and the separate transport work.