fix(#1296): align config docs/prompts/schema with consumers (#1299)

* fix(#1296): align config docs/prompts/schema with consumers

The user-facing config surface disagreed with what the consumers actually do
(subset of the #1216 audit). No runtime consumption behavior changes.

- workflow.subagent_timeout: settings-advanced.md prompt + docs/CONFIGURATION.md
  said "seconds (default 600)" but the consumer (map-codebase.md) uses
  milliseconds (default 300000). Relabeled all four spots in settings-advanced.md
  (prompt, parse-default list, example, confirmation table) + the CONFIGURATION.md
  row.
- review.models.<cli>: settings-integrations.md, docs/CONFIGURATION.md (Integration
  Settings), and docs/CLI-TOOLS.md documented a shell command, but review.md injects
  the value into a --model/-m flag. Relabeled to a bare model id and reconciled the
  contradictory CONFIGURATION.md sections.
- workflow.test_command + workflow.build_command: consumed via config-get
  (test_command in verify-phase/execute-phase/audit-fix/post-merge-gate;
  build_command in post-merge-gate) and documented, but absent from validKeys so
  `config set` rejected them. Registered both in config-schema.manifest.json and
  documented them in references/planning-config.md (overview + complete reference).

Regression tests: behavioral config-set tests (tests/config.test.cjs) + doc-parity
content guards (tests/config-field-docs.test.cjs).

Deferred to other #1216 clusters: security-gate wiring, search_gitignored wiring,
mvp_mode, source_grounding_authority labeling, and config-set enum enforcement.

Closes #1296
Refs #1216

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(changeset): Fixed fragment for #1296 config-surface alignment

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

tests/config.test.cjs

@@ -1418,3 +1418,47 @@ describe('plan_review.source_grounding and plan_review.source_grounding_authorit
     );
   });
 });
+
+// ─── config-set workflow.test_command (#1216) ────────────────────────────────
+
+describe('config-set workflow.test_command (#1216)', () => {
+  let tmpDir;
+
+  beforeEach(() => {
+    tmpDir = createTempProject();
+    runGsdTools('config-ensure-section', tmpDir);
+  });
+
+  afterEach(() => {
+    cleanup(tmpDir);
+  });
+
+  test('config-set accepts workflow.test_command', () => {
+    const result = runGsdTools(['config-set', 'workflow.test_command', 'npm test'], tmpDir);
+    assert.ok(result.success, `config-set should accept workflow.test_command: ${result.error}`);
+    const config = readConfig(tmpDir);
+    assert.strictEqual(config.workflow?.test_command, 'npm test', 'value must be persisted');
+  });
+
+  test('config-set workflow.test_command persists a custom make command', () => {
+    const result = runGsdTools(['config-set', 'workflow.test_command', 'make test'], tmpDir);
+    assert.ok(result.success, `config-set should accept workflow.test_command: ${result.error}`);
+    const config = readConfig(tmpDir);
+    assert.strictEqual(config.workflow?.test_command, 'make test', 'make test must be persisted');
+  });
+
+  test('config-get workflow.test_command returns the set value', () => {
+    runGsdTools(['config-set', 'workflow.test_command', 'cargo test'], tmpDir);
+    const result = runGsdTools('config-get workflow.test_command', tmpDir);
+    assert.ok(result.success, `config-get should return workflow.test_command: ${result.error}`);
+    const output = JSON.parse(result.output);
+    assert.strictEqual(output, 'cargo test', 'config-get must return the persisted value');
+  });
+
+  test('config-set accepts workflow.build_command', () => {
+    const result = runGsdTools(['config-set', 'workflow.build_command', 'npm run build'], tmpDir);
+    assert.ok(result.success, `config-set should accept workflow.build_command: ${result.error}`);
+    const config = readConfig(tmpDir);
+    assert.strictEqual(config.workflow?.build_command, 'npm run build', 'value must be persisted');
+  });
+});