agra 0b13498e25 fix(0115): source-aware global selection — own-wins for module globals ...

The globals registry (global_names) was last-wins across modules with no
per-importer gate: any module's bare K could read/write/type against an
unrelated module's same-named global (hash.sx's K table hijacked every
user K once std's namespace tail pulled hash into the program), and an
own const of an unsupported shape borrowed another module's const and
panicked at the unresolved-type tripwire.

- var_decl joins RawDeclRef: module globals are selectable raw authors.
- selectGlobalAuthor (the globals analogue of F2's selectModuleConst):
  own author wins, one flat-visible author resolves, >=2 distinct flat
  authors diagnose loudly, authored-but-not-visible diagnoses, and a
  compiler-synthesized global (no raw author) emits untracked. A var_decl
  author whose per-source registration was deduped at flat-merge (two
  modules declaring the same extern symbol) serves the symbol's
  registration.
- All bare-identifier global sites route through it: value read, addr-of,
  assignment (store + compound), lvalue address, fn-ptr call, call param
  typing, and expression type inference.
- selectModuleConst gains .own_opaque: an own const author with no
  materialized per-source value (e.g. an array '::' const) blocks
  borrowing another module's same-named const — the read diagnoses
  cleanly instead of panicking.
- The fn-as-VALUE arm admits raw-facts-only authors: an own fn whose name
  a flat-merge collision dropped from the global decl list (first-wins)
  now resolves via author selection for func_ref/closure/Any shapes too.

Regressions: examples 0835 (own const vs flat array global), 0836 (main
const vs namespaced array global, incl. inference), 0837 (own array
const never borrows cross-module — clean unresolved).

2026-06-11 10:47:30 +03:00

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