[Fix] Thinking headings run together in task transcripts

[roomote-community]

​Opened on behalf of @mrubens. Follow up by mentioning @roomote, in the web UI, or in Discord.

What changed

• restore blank lines when a reasoning line consists entirely of bold headings that providers concatenated as adjacent Markdown
• retain the raw live reasoning stream separately so every chunk is normalized from the complete source text, including after client state is rebound
• apply the same normalization to persisted OpenCode thoughts
• cover complete payloads, three-heading chunk continuations, separators split across chunks, and ordinary adjacent bold emphasis with regression tests

Why this change was made

OpenCode reasoning can contain adjacent bold headings without whitespace, causing task thinking to render as a single run-on block. The malformed separator was preserved through persistence and playback.

Impact

Thinking headings remain readable while tasks are running and after transcripts are reloaded. Inline adjacent bold spans such as **read****write** remain unchanged because only lines made entirely of adjacent bold headings are normalized.

[roomote-community]

No code issues found. See task

• packages/types/src/acp.ts:58 The heading normalizer inserts paragraph breaks between ordinary adjacent bold spans.
• apps/web/src/app/(sandbox)/task/[taskId]/hooks/services/acp-protocol-service.ts:1292 Live chunk normalization loses separation when a later heading arrives after an earlier normalization.

_{Reviewed 37bc98e}