fix(mir/builder): use function-local ValueId throughout MIR builder

Phase 25.1b: Complete SSA fix - eliminate all global ValueId usage in function contexts.

Root cause: ~75 locations throughout MIR builder were using global value
generator (self.value_gen.next()) instead of function-local allocator
(f.next_value_id()), causing SSA verification failures and runtime
"use of undefined value" errors.

Solution:
- Added next_value_id() helper that automatically chooses correct allocator
- Fixed 19 files with ~75 occurrences of ValueId allocation
- All function-context allocations now use function-local IDs

Files modified:
- src/mir/builder/utils.rs: Added next_value_id() helper, fixed 8 locations
- src/mir/builder/builder_calls.rs: 17 fixes
- src/mir/builder/ops.rs: 8 fixes
- src/mir/builder/stmts.rs: 7 fixes
- src/mir/builder/emission/constant.rs: 6 fixes
- src/mir/builder/rewrite/*.rs: 10 fixes
- + 13 other files

Verification:
- cargo build --release: SUCCESS
- Simple tests with NYASH_VM_VERIFY_MIR=1: Zero undefined errors
- Multi-parameter static methods: All working

Known remaining: ValueId(22) in Stage-B (separate issue to investigate)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

lang/src/shared/hako_module.toml

@@ -11,6 +11,7 @@ common.mini_vm_compare = "common/mini_vm_compare.hako"
 common.string_helpers = "common/string_helpers.hako"
 common.string_ops = "common/string_ops.hako"
 common.box_helpers = "common/box_helpers.hako"
+common.box_type_inspector = "common/box_type_inspector_box.hako"
 common.entry_point_base = "common/entry_point_base.hako"
 common.common_imports = "common/common_imports.hako"
 
@@ -26,6 +27,7 @@ json.utils.json_number_canonical = "json/utils/json_number_canonical_box.hako"
 
 # Host bridge & adapters
 host_bridge.host_bridge = "host_bridge/host_bridge_box.hako"
+host_bridge.codegen_bridge = "host_bridge/codegen_bridge_box.hako"
 adapters.map_kv_string_to_array = "adapters/map_kv_string_to_array.hako"
 
 # MIR helpers (exported as stable module names)