fix(flycheck): correct abbrev-mode no-arg toggle in cj/prose-helpers-on

The shape (if (not (abbrev-mode)) (abbrev-mode)) calls abbrev-mode with
no argument -- that's the toggle signature, not a query. When the mode
was already on the function flipped it off then on instead of being a
no-op. Replaced with (unless (bound-and-true-p VAR) (MODE 1)) for both
abbrev-mode and flycheck-mode. 4 ERT tests cover both-off, both-on, and
the two mixed states.

Also ran the module hardening pass across 24 newly-added modules,
renamed the six completed Review sub-tasks to Harden, filed 11 new
findings under their Harden parents, and broke three design specs
(EMMS-free music, dev F-keys, dev-setup-project) into 20
dependency-ordered sub-tasks via parallel subagents. Verified the
sqlite finalizer bug from 2026-04-26 is gone and closed its tracking
entry.

1 files changed, 5 insertions, 6 deletions

diff --git a/modules/flycheck-config.el b/modules/flycheck-config.el
index e2e8abe9..8c3e2a7b 100644
--- a/modules/flycheck-config.el
+++ b/modules/flycheck-config.el
@@ -34,13 +34,12 @@
 ;;; Code:
 
 (defun cj/prose-helpers-on ()
-  "Ensure that abbrev, flyspell, and flycheck are all on."
+  "Ensure that `abbrev-mode' and `flycheck-mode' are on in the current buffer."
   (interactive)
-  (if (not (abbrev-mode))
-      (abbrev-mode))
-  ;;  (flyspell-on-for-buffer-type)
-  (if (not (flycheck-mode))
-      (flycheck-mode)))
+  (unless (bound-and-true-p abbrev-mode)
+    (abbrev-mode 1))
+  (unless (bound-and-true-p flycheck-mode)
+    (flycheck-mode 1)))
 
 ;; ---------------------------------- Linting ----------------------------------