Forgejo's Mermaid parser is stricter than GitHub's and rejected two
diagrams in workflow-design.md:
1. Flowchart 3.1 — `@check`, `@test`, `@make` in pipe-delimited edge
labels were tokenised as LINK_ID (newer Mermaid uses `@{...}` for
edge IDs), e.g. `P7E -->|@check → @test → @make| P7` failed at
the first @.
2. State diagram 3.2 — the second colon inside transition labels
(`escalate: test_design`) collided with the `:` field separator
that splits transition from label.
Drops the @-prefix from labels in all three diagrams (`@check` → `check`
in prose-of-the-label only; ADRs and prose elsewhere keep `@check`
backticked, which is just markdown). Replaces second colons with
descriptive text. Drops parentheses from state-diagram transition
labels. Drops the Unicode arrow `→` in favour of plain words.
Quotes the flowchart node-label strings to keep `<br/>` safe.
The ADR text and prose continue to use `@<name>` references — those
live in markdown, not Mermaid, and render the same.
Harald Hoyer
0b15944d1c