fix(research): emit colors on the study category preset

[TimeToBuildBob]

Problem

The Research Edition web UI ships a research-study category set via
scripts/emit_research_category_preset.py → AW_PRESET_CATEGORY_SETS. The
emitted taxonomy had no data.color, so the Activity view rendered study
categories unstyled (grey) next to the colored built-in default set.

Tracked in #1439 (the companion aw-webui change
stops default from silently winning; this PR is the color half).

What this does

• Assigns a stable hex color to every study category in CATEGORY_COLORS.
• build_preset() fails the build if the color table drifts from
  CATEGORY_MAP ∪ APP_CATEGORY_MAP (missing or extra keys).
• Leaves rule shape unchanged (type / regex / ignore_case only) so the
  oldest pinned web UI parser still accepts the payload.

Tests

python3 -m pytest scripts/tests/test_emit_research_category_preset.py -q — 13 passed.

• every category has a distinct #RRGGBB color
• color table matches the study taxonomy exactly
• existing exact-match / portable-escape / GITHUB_ENV tests still pass

Notes

Does not close #1439 on its own. The Activity view still needs the shipped
preset to be the active set (aw-webui follow-up) and a research recut to
pick both up.

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge, with no concrete correctness, security, or repository-rule issues identified.

Summary

• Adds a distinct hexadecimal color for all 18 study categories.
• Emits each color through the category-level data.color field without changing rule metadata.
• Validates missing and obsolete color entries during preset generation.
• Adds coverage for color presence, uniqueness, format, and taxonomy alignment.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
    A[CATEGORY_MAP] --> C[Derive taxonomy]
    B[APP_CATEGORY_MAP] --> C
    D[CATEGORY_COLORS] --> E[Validate exact key coverage]
    C --> E
    E --> F[Build research-study preset]
    F --> G[Emit compact JSON]
    G --> H[AW_PRESET_CATEGORY_SETS]
    H --> I[Research Edition web UI]

Loading

[TimeToBuildBob]

🤖 AI code review

Safe to merge — no P0/P1 findings

Confidence 5/5

✅ No findings. The diff looks correct to me on this pass.

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