fix(xce-test-cli-ux): fix bug-1711's display and text defects

Eight display/text defects in test.c: worker_status_str's "UNKOWN"
typo, cmd_runtasks's "sequentail" typo (display-only, verified inert
against the real launch_type consumer), cmd_reslist's right-justified
columns and unlabeled hex Flags (now matching workerlist/state_raw's
conventions), joblist's raw-epoch timestamps (now via a format_job_time
helper delegating to the same formatter ctrlstatus already uses) and
combined NTasks column split into MinTasks/MaxTasks, job_state_str's
missing raw-state fallback for ambiguous RUN+EXIT (mirroring
print_jobinfo's existing pattern), and getconf's no-op group/config
list stubs (now genuinely implemented from already-fetched data,
matching the three sibling print functions' convention).

worker_status_str/job_state_str/format_job_time are pure functions with
no networking/REPL/global-state dependency, extracted into a new
joblist_display.c/.h module with a permanent 20-test standalone suite --
following this codebase's own resval_typeresolve.c/misc.c precedent for
testing functions that would otherwise be stranded inside untестable
test.c. cmd_reslist/joblist_query/cmd_getconf's table-printing bodies
inline fetch+print and remain untestable without a live cluster.
1348/1348 across the full controller suite (+20), 0 regressions.

Task 2.5 of .kiro/specs/xce-test-cli-ux/tasks.md.
Requirements: 11.1, 11.3, 11.4, 11.5, 11.6, 11.7, 11.8

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019jaMf9QEwpugH2W9KAuc7f

src/controller/meson.build

@@ -55,7 +55,7 @@ controller = executable('xce_controller',
                         link_args: wrap_link_args,
                         install: true)
 
-xce_test_src = [ 'testsuite/test.c', 'testsuite/waldump.c', 'testsuite/walcompare.c', 'testsuite/snapverify.c', 'testsuite/snapdiff.c', 'testsuite/configcompare.c', 'testsuite/resval_typeresolve.c', 'testsuite/rcfile.c', 'testsuite/flagspec.c', 'testsuite/interruptcall.c', 'testsuite/confirm.c', 'testsuite/listfmt_json.c']
+xce_test_src = [ 'testsuite/test.c', 'testsuite/waldump.c', 'testsuite/walcompare.c', 'testsuite/snapverify.c', 'testsuite/snapdiff.c', 'testsuite/configcompare.c', 'testsuite/resval_typeresolve.c', 'testsuite/joblist_display.c', 'testsuite/rcfile.c', 'testsuite/flagspec.c', 'testsuite/interruptcall.c', 'testsuite/confirm.c', 'testsuite/listfmt_json.c']
 
 # BSD-licensed readline replacement (scheduler-core spec, task 12.1 review
 # finding): GNU readline is GPL; xce_test's REPL only needs readline()/
@@ -397,3 +397,29 @@ test('host runusage test', host_runusage_unit_test,
      timeout: 60,
      env: ['ASAN_OPTIONS=detect_leaks=0'])
 
+# xce-test-cli-ux task 2.5 remediation: joblist_display.c is a small,
+# dependency-light module (no networking/REPL/global state) extracted from
+# test.c's worker_status_str()/job_state_str()/format_job_time() specifically
+# so their bug-1711 display-formatting fixes can be unit-tested in isolation
+# -- test.c itself cannot be white-box included into a Unity test, same
+# rationale as resval_typeresolve_unit_test above. Standalone binary (not
+# folded into controller_unit_test_src) since it has zero dependency on
+# controller.c/cluster.c internals, mirroring resval_typeresolve_unit_test's/
+# host_runusage_unit_test's own standalone-binary rationale.
+joblist_display_unit_test_src = [
+  'testsuite/test_joblist_display.c',
+  'testsuite/joblist_display.c',
+]
+
+joblist_display_unit_test = executable('joblist_display_unit_test',
+                                       joblist_display_unit_test_src,
+                                       include_directories: [incdir],
+                                       dependencies: controller_unit_test_deps,
+                                       c_args: ['-DXCE_TESTING'],
+                                       install: false)
+
+test('joblist display test', joblist_display_unit_test,
+     suite: 'controller',
+     timeout: 60,
+     env: ['ASAN_OPTIONS=detect_leaks=0'])
+