v0.12.4

Added

• Undeclared identifier detection — identifiers used but not declared are flagged as errors; recognizes signals, variables, constants, entity ports, generics, types, subtypes, enumeration literals, package names, and for-loop variables (#64)
• Go to Definition for entity-local signals, variables, and constants — Ctrl+Click jumps from usage to declaration inside the architecture body (#69)

Fixed

• Undeclared identifier linter: false positives for time units, severity levels, hex/binary literal prefixes, identifiers inside string literals, and package declaration names
• Unused-signal linter: no longer flags package-scoped declarations (#70)

Documentation

• README updated with undeclared identifier detection, Go to Definition for local signals, and updated Code Actions table