fix(wasm): finalize config without desktop shell lookup

The Node smoke test expected shaper info logs after the default logger
became errors-only. Its failure also exposed config finalization calling
an unsupported passwd lookup on wasm and returning Unexpected before
normalization completed.

Skip shell defaults on wasm, matching upstream Zig. Assert successful
config finalization and window-width clamping in the Node test. Check
shaper output directly while verifying that info logs stay suppressed.
Document these behaviors in the wasm port notes.

Test Plan:
- cargo test -p ghostty-wasm --test node (passed)
- cargo test -p ghostty-config --lib (291 passed)
- cargo clippy --target wasm32-unknown-unknown -p ghostty-wasm -- -D warnings
- cargo clippy; cargo clippy --benches; cargo clippy --tests
- cargo +nightly fmt, followed by the native Clippy checks again
- git diff --check

Related-commit: 4fb9faa667

crates/ghostty-wasm/tests/node_test.js

@@ -127,11 +127,12 @@ const liveValues = (zigjs) => zigjs.values.slice(7).filter((v) => v !== null).le
   {
     const cfg = x.config_new();
     assert.ok(cfg);
-    const s = host.writeString('font-size = 18\nwindow-padding-x = 7\nnot-a-key = 1\n');
+    const s = host.writeString('font-size = 18\nwindow-padding-x = 7\nwindow-width = 1\nnot-a-key = 1\n');
     x.config_load_string(cfg, s.ptr, s.len);
     s.free();
     assert.strictEqual(x.config_diagnostics_count(cfg), 1);
     x.config_finalize(cfg);
+    assert.deepStrictEqual(logs, [], 'config finalization must succeed without desktop shell lookup');
     const cap = 1 << 16;
     const out = x.wasm_alloc(cap);
     const n = x.config_format(cfg, out, cap);
@@ -140,6 +141,8 @@ const liveValues = (zigjs) => zigjs.values.slice(7).filter((v) => v !== null).le
     x.wasm_free(out, cap);
     assert.match(text, /font-size = 18/);
     assert.match(text, /window-padding-x = 7/);
+    // Width clamping happens after shell defaults: finalization must reach it.
+    assert.match(text, /window-width = 10\n/);
     x.config_free(cfg);
   }
 
@@ -202,10 +205,13 @@ const liveValues = (zigjs) => zigjs.values.slice(7).filter((v) => v !== null).le
   x.glyph_free(gg);
   assert.strictEqual(canvases[0].lastText.t, 'é');
 
-  // shaper_test prints through a terminal and logs the shaped runs
+  // shaper_test prints through a terminal and shapes its rows. The default
+  // errors-only logger suppresses the info records for those shaped runs.
   const st = host.writeString('hello é');
   x.shaper_test(sh, face, st.ptr, st.len);
-  assert.ok(logs.some((l) => l.startsWith('info(')), logs.join('\n'));
+  assert.deepStrictEqual(logs, [], 'shaper info logs must be suppressed');
+  assert.ok(x.shaper_shape(sh, face, outp, 16) > 0, 'shaper_test prepared a run');
+  assert.strictEqual(new Uint32Array(instance.exports.memory.buffer, outp, 2)[1], 0x68);
 
   // ---- deferred face ----
   const d = x.deferred_face_new(f.ptr, f.len, 0);