fix(template): replace hardcoded era data with dynamic LEARNING.topicEvolution

[simongonzalezdc]

Two template fixes that eliminate era scanner false positives across all projects:

Chart 2 (Topic Evolution)
Was hardcoded with Liminal-specific era data (Era 1, Era 2, Era 3 named refs). Every other project's era scanner was flagging these as stale references against their own commit-eras.json. Now reads from LEARNING.topicEvolution — populated from YouTube AI video topic breakdown per phase. Shows noData() if absent.

search_timeline
Was accessing s.query but the data pipeline writes s.title. Added fallback: s.query || s.title with 'Searched for ' prefix stripped.

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Summary by CodeRabbit

• Bug Fixes
  • Fixed the "Topic Evolution" chart to display actual runtime data instead of hardcoded values, with improved handling when no data is available.
  • Improved query text display in the "Search Archive" chart for better accuracy and clarity.

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• archaeology/visualization/template.html

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📝 Walkthrough

Walkthrough

Two visualization charts in a template are updated: the Learning Curve chart derives eras from runtime data with empty-data handling, and the Search Timeline chart extracts query text from data properties with prefix stripping.

Changes

Visualization Template Updates

Layer / File(s)	Summary
Learning Curve chart eras binding archaeology/visualization/template.html	Topic Evolution chart eras series now derives from LEARNING.topicEvolution at runtime instead of hardcoded data, with noData early return when eras list is empty.
Search Timeline query text extraction archaeology/visualization/template.html	Active Research Timeline chart query display text now uses s.query with fallback to s.title, and strips leading "Searched for " prefix before rendering.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/learning-chart-dynamic-era-data

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Populate topic evolution before requiring it

When reports are generated through the inspected visualize path, PROJECT_DATA is just the inlined deliverables/data.json plus commit-era top-level fields (archaeology/cli.py lines 530-545), and the data generator does not emit learning.topicEvolution at all (scripts/data/generate_data_json.py builds only telemetry/codebase/developer fields). With this change, those normal generated reports take the [] fallback and always render “Topic evolution data not available,” so the chart disappears for every project unless someone hand-edits a non-produced field into the JSON.

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