Enable static box method calls for boxes imported via `using` statement.
Root cause: 3 interrelated issues
1. Cross-function ValueId: methodize created singleton with ValueId that
can't be used across MIR function boundaries
2. Missing registration: using-imported static boxes weren't in
static_box_decls (only AST-based boxes were registered)
3. Wrong dispatch: method.rs tried InstanceBox dispatch instead of
MIR function table lookup for static boxes
Fixes:
- unified_emitter.rs: Use receiver=None for StaticCompiler boxes
- vm.rs: Auto-detect and register static boxes from MIR function names
- mod.rs: Add has_static_box_decl() helper
- method.rs: Add MIR function table lookup path for static boxes
- guard.rs: Trust methodize for StaticCompiler boxes without type info
Test: JsonParserBox.toString() via using import now works correctly
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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