feat(joinir): Phase 135 P0 - ConditionLoweringBox allocator SSOT (ValueId collision fix)

## Summary
Root cause: ConditionLoweringBox was bypassing ConditionContext.alloc_value (SSOT allocator),
causing ValueId collisions between JoinIR condition params and lowered instructions.

## Changes
1. **ConditionLoweringBox (expr_lowerer.rs)**: Must use ConditionContext.alloc_value
   - Pass &mut ConditionContext to lower_condition (SSOT allocator)
   - Eliminates internal counter usage

2. **Allocator unification (condition_lowerer.rs, method_call_lowerer.rs)**:
   - Accept &mut dyn FnMut() -> ValueId as allocator parameter
   - Ensures all lowering paths use same SSOT allocator

3. **Boundary Copy deduplication (joinir_inline_boundary_injector.rs)**:
   - Deduplicate condition_bindings by dst
   - Fail-Fast if different sources target same dst (MIR SSA violation)

4. **Trim pattern fixes (trim_loop_lowering.rs, trim_pattern_validator.rs, stmts.rs)**:
   - Use builder.next_value_id() instead of value_gen.next() in function context
   - Ensures function-level ValueId allocation respects reserved PHI dsts

## Acceptance
✅ ./target/release/hakorune --verify apps/tests/phase133_json_skip_whitespace_min.hako
✅ Smoke: phase135_trim_mir_verify.sh - MIR SSA validation PASS
✅ Regression: phase132_exit_phi_parity.sh - 3/3 PASS
✅ Regression: phase133_json_skip_whitespace_llvm_exe.sh - compile-only PASS

🤖 Generated with Claude Code

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

docs/development/current/main/10-Now.md

@@ -18,6 +18,13 @@
 **追加（Phase 132-P3）: Exit PHI collision の早期検出（debug-only）**
 - `verify_exit_phi_no_collision()` を `contract_checks.rs` に追加し、ValueId 衝突を JoinIR merge の段階で Fail-Fast する
 
+## 2025‑12‑15：Phase 133–135（短報）
+
+- Phase 133: promoted carrier（Trim）の `join_id` 解決を SSOT に寄せて修正（smoke は compile-only）。
+- Phase 134: plugin loader best-effort loading を導入（決定的順序 + failure 集約 + 継続）。
+- Phase 135: ConditionLoweringBox が allocator SSOT を無視して ValueId 衝突を起こす問題を根治。
+  - 詳細: `docs/development/current/main/phases/phase-135/README.md`
+
 ## 2025‑12‑14：現状サマリ
 
 （補足）docs が増えて迷子になったときの「置き場所ルール（SSOT）」: