Composite revenue carrier (ADR 0014) + dashboard panel relocation

[piotrlangowski]

Summary

Two related but separable changes, kept as one PR with two commits since they touch overlapping dashboard files:

1. Composite revenue carrier (ADR 0014) + wizard multi-select (edc0b0b)

• New composite carrier sums Cohort ARPU, Plan seats, Service monetization, and Credit pools in one scenario, with automatic double-counting prevention via PerspectiveRelation folding rules (cohort↔plan upsell, copilot↔ARPU folding, pool↔service exclusive billing) and incommensurable-population detection (>1.2x population mismatch).
• TriangulationPanel gets a Composite Component Breakdown table (additive/folded/pool-billed/blocked roles) and relation comparability warnings.
• The scenario wizard's "How does this initiative earn revenue?" step is now a multi-select instead of a single choice: Cohort / Plan / Monetization tiles can be combined freely, selecting 2+ auto-activates composite, and a dedicated composite bar (visually separated below a divider) selects all three at once. A guard prevents deselecting the last active dimension.
• Pricing Plans and Feature Packs sections in the wizard are now always editable (previously hidden under non-matching carriers) with a diagnostic badge instead, so seat/pack data is never silently dropped when switching carriers.

2. Scenario Configuration Panel relocation (568fecf)

• Extracts the scenario configuration controls out of the scenario dashboard page into a dedicated ScenarioConfigurationPanel component, freeing vertical space for the central chart.
• DiagnosticsBanner becomes collapsible (grouped warning/note counts) instead of one card per diagnostic item.

Test plan

• npm run check — 0 errors (75 pre-existing warnings, unrelated)
• npm test — 235/235 passing across 11 suites
• Manually verified in-browser (dev server + preview tools) on /scenarios/new:
  • single-dimension selection (cohort / plan / monetization) each resolve to the correct modelingType/revenueCarrier hidden fields
  • selecting 2 dimensions auto-activates composite; clicking the composite bar directly selects all three
  • attempting to deselect the last active dimension is blocked
  • monetization sub-carrier radio (Atomic Service / Feature Pack / Unified Credit Pool) only shows when Monetization is the sole selection, and switching it correctly re-derives revenueCarrier and the pool-tier required attribute
  • edit-mode hydration verified against an existing GTM/plan-carrier scenario — correct tile reflected on load
• Manual smoke test of the relocated ScenarioConfigurationPanel dashboard layout (not re-verified in this session — carried over from an earlier session's work)

🤖 Generated with Claude Code