TestDbFactory was redeclared as a private nested class in 40 test files,
NullServiceProvider and StubNotesApi in 14 each, DefaultStub in 5 — 73
declarations, all semantically identical (StubNotesApi differed only in
formatting and type qualification). They now live in TestDoubles.cs next to the
existing StubWorkerClient, which was already the shared-double pattern in this
project.
Remove the redundant TaskUpdated broadcast in TaskRunner.ContinueAsync's
queue-claim path, consolidate InteractiveLaunchSpecService's seven
MCP_TOOL_TIMEOUT literals into one constant (fixing the merge-helper handoff
spec's stale 200000ms value), and surface OpenQuickClaudeSession's two
failure cases via ErrorReported/footer instead of a silent no-op, with a
less ambiguous icon.