fix(cli): tri ui command fails with FileNotFound - PATH not passed to subprocess

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Bug

tri ui command fails with error:
swift build failed: FileNotFound

Root Cause

In src/tri/tri_commands.zig, the uiBuild function calls std.process.Child.run but does NOT pass the current environment to the subprocess:

zig const result = std.process.Child.run(.{ .allocator = allocator, .argv = &.{ "swift", "build" }, .cwd = "apps/queen", .max_output_bytes = 256 * 1024, // ❌ Missing: .env = ... or .has_env = true })

Expected Behavior

When tri ui is run, it should:

1. Kill old Trinity.app processes
2. Run swift build in apps/queen directory
3. Copy binary to Trinity.app bundle
4. Open Trinity.app

Actual Behavior

Step 2 fails with FileNotFound because the subprocess doesn't inherit PATH from the parent process.

Workaround

Launch Queen UI directly:
bash ./.build/arm64-apple-macosx/debug/trinity

Fix Required

Add environment inheritance to uiBuild function. In Zig 0.15.x, the correct API needs to be determined (tested: .has_env, .env = std.process.Child.Env.from_current_process, absolute paths - none worked).

Priority: P2 (medium) - workaround exists

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✅ Status: COMPLETE

Fixed both issues:

1. tri ui PATH inheritance (see commit 3768aad)

   • Added std.process.getEnvMap() to pass environment to subprocess
   • .env_map = &env_map in std.process.Child.run()

2. TRI-27 golden test (same commit)

   • Fixed loader memory packing (4 bytes per word, not 1 per word)
   • Fixed PC initialization (offset 10 = word 2)
   • Fixed CPUState typo in test_golden.zig
   • Fixed assembler size field reservation

Result: zig build test-tri27-golden now passes ✅

φ² + 1/φ² = 3 | TRINITY

[gHashTag]

Closing issue - both parts fixed and committed