fix: somewhat optimised AI instructions in tools

feat: AI tool math formulas to increase reliability of cheaper models

fix: auto fx conversion when adding position total values not units

feat: phase 3 Raycast store, ask AI layer base implementation

fix: ci unit tests needed raycast-env.d.ts and exempted save-to-local tests from CI

fix:improved yahoo finance client resilience to minor schema changes

fix: usePortfolioValue useEffect needed to fetch from cache with daily granularity (as stored and intended)

fix: greptile suggested minor fixes around type usage and currency locale

docs: phase 3 adding Raycast Store images

fix: phase 3 import export cleanup and bugfix

fix: phase 3 portfolio sums fix

fix: phase 3 colour consistency patching 1

feat: phase 3 Raycast store publish preparations, baseline compliance

feat: phase 2 Custom icon and color scheme

fix: phase 2 Portfolio Import/Export improvements