* fix(plugin): continue one timeline item across ACP chunks without messageId
The plugin ACP reducer minted a new fallback id for every
agent_message_chunk / agent_thought_chunk that carried no messageId, so
a streamed reply rendered as one block per chunk, splitting words and
Markdown delimiters (#4699). Keep one fallback id per chunk kind and end
it on a chunk of the other kind, a tool call, a plan, a user message, or
a turn boundary, matching the server-side ACP provider.
* fix(plugin): end the other chunk kind's item on any chunk
A chunk of one kind now ends the other kind's fallback item before the
content or id is looked at, so an explicit-id text chunk between two
id-less thoughts yields three items instead of merging the thoughts.
The test declares the streamed updates through the connector harness
instead of handling protocol frames itself.
* test(plugin): verify ACP message boundaries and rendered Markdown
* test(app): synchronize rewind setup and menu selection
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Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>
* fix(desktop): wait for Metro HTTP readiness before launching Electron
Expo briefly listens while probing port availability. A successful TCP connection can therefore launch Electron before Metro starts and leave it exiting on connection refusal. Require the configured renderer origin to report the running packager status.
* test(ci): consolidate fixture and readiness corrections
Await the connection and UI states each journey owns, isolate Git fixture contents before observation, and hold real Markdown frames at asserted checkpoints. Keep creation completion diagnostics explicit without claiming the original Windows failure is fixed.
* test(desktop): describe Metro readiness through HTTP states
Keep protocol mechanics in the fixture and assert readiness only after a successful packager response. Cover non-success status and unrelated HTTP content without inline synchronization in the test body.
* fix(app): keep incomplete Markdown formatted while streaming
Treat unfinished formatting at the growing assistant-message tail as provisional so delimiters and link destinations do not flash while tokens arrive. Completed messages retain ordinary Markdown parsing.
* test(app): express streaming Markdown checks as user actions
