Ship macro/FRED interpretation feature: per-variable coefficient interpretation fields (unit_meaning/transformation/lag/fred_series/economic_channel/hazard_ratio_per_unit/worked_example) across variable_dictionary, coefficients, macro_glossary, freddie/hazard; UI hazard-ratio column + expandable interpretation panels + How-to-read intro panels.

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Ship reasoned-route spelled-out-number guard fix

UI v3: fintech-direction design pass (5 grafts), waterfall historical-mode fix, explain-strip placement + shared hook, palette contrast fix