\n>

Original Issue

\n> \n> ```text\n> Topic GUID: 52318235-104f-5025-b1d7-6f221c56ae37\n> \n> ## Why\n> PAEM already has a mature Plotly visualization library. Porting a small “core” subset into TMP lets us standardize visuals and reuse functionality across repos.\n> \n> ## Scope\n> - Create `src/trend_analysis/viz/` with a curated subset of PAEM `pa_core.viz`.\n> - Start with minimum set needed for MC:\n> - theme\n> - utils\n> - fan (quantile band)\n> - path_dist\n> - risk_return\n> - Keep functions pure (no Streamlit imports).\n> \n> ## Non-Goals\n> - Do not port the entire PAEM viz directory in this first pass.\n> - Do not add PAEM simulation internals as a dependency.\n> \n> ## Tasks\n> - [ ] Audit PAEM dependency graph for the subset and port only required pieces.\n> - [ ] Copy/adapt modules from PAEM and update imports/namespacing.\n> - [ ] Add `trend_analysis.viz.__init__` exports.\n> - [ ] Tests:\n> - [ ] Each `make(...)` returns `plotly.graph_objects.Figure`\n> - [ ] `fig.to_json()` succeeds\n> \n> ## Acceptance Criteria\n> - [ ] `import trend_analysis.viz` works without Streamlit.\n> - [ ] Minimal example inputs produce figures for each ported chart.\n> - [ ] CI passes.\n> \n> ## Implementation Notes\n> _Not provided._\n> \n> ---\n> Synced by [workflow run](https://github.com/stranske/Trend_Model_Project/actions/runs/21857960567).\n> ```\n>

\n\n—\nPR created automatically to engage Codex.","base_ref","head_ref","pull_request_info",[817],{"_773":57,"_57":818},"\nCodex Worker activated for branch `codex/issue-4846`.\n\n@codex start\n\nAutomated belt worker prepared this PR. 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