test: add 86 new tests, fix 3 production bugs, fix 8 stale tests

New test coverage (86 tests across 7 files):
- custom-case: 43 tests (title-case-region, upcase-dwim, downcase-dwim)
- custom-datetime: 10 tests (all insert methods with mocked time)
- config-utilities: 11 tests (format-build-time type branching)
- org-capture-config: 22 tests (date-prefix + event-content)

Production bugs found and fixed:
- custom-case: title-case-region crashes on whitespace/punctuation-only input
  (char-after returns nil when no word chars found)
- org-capture-config: browser branch missing empty-string guard on :initial
  plist value, producing stray newline in capture output
- mousetrap-mode: keymap never registered in minor-mode-map-alist, so mode
  was silently not blocking any mouse events. Now pushes/removes on toggle.

Additional fixes:
- local-repository: fix cons cell syntax bug in localrepo-initialize
  (was calling vars as functions instead of using cons)
- dupre-theme tests: update rainbow-delimiter color expectations
- mousetrap tests: update dashboard profile (primary-click → scroll+primary)
- music completion test: bind completion-ignore-case to prevent pollution
- Delete redundant interactive recording test (duplicate of ERT version)

Refactoring:
- org-capture-config: extract cj/org-capture--date-prefix pure function
  from cj/org-capture-format-event-headline for testability

Test checklist: todo.org updated to [11/25], removed untestable modules

1 files changed, 7 insertions, 7 deletions

diff --git a/tests/test-integration-mousetrap-mode-lighter-click.el b/tests/test-integration-mousetrap-mode-lighter-click.el
index fcae89a6..b9f32fda 100644
--- a/tests/test-integration-mousetrap-mode-lighter-click.el
+++ b/tests/test-integration-mousetrap-mode-lighter-click.el
@@ -14,7 +14,7 @@
 
 (ert-deftest test-integration-lighter-click-enables-mode-in-dashboard ()
   "Test clicking lighter in dashboard-mode enables mode with correct profile.
-Dashboard uses primary-click profile which blocks scrolling but allows mouse-1."
+Dashboard uses scroll+primary profile which allows scrolling and mouse-1."
   (with-temp-buffer
     (let ((major-mode 'dashboard-mode)
           (mouse-trap-mode nil))
@@ -27,12 +27,12 @@ Dashboard uses primary-click profile which blocks scrolling but allows mouse-1."
       ;; Mode should be enabled
       (should mouse-trap-mode)
 
-      ;; Keymap should be built for dashboard (primary-click profile)
+      ;; Keymap should be built for dashboard (scroll+primary profile)
       (should (keymapp mouse-trap-mode-map))
 
-      ;; Verify profile-specific behavior: mouse-1 allowed, scroll blocked
+      ;; Verify profile-specific behavior: mouse-1 and scroll allowed
       (should (eq (lookup-key mouse-trap-mode-map (kbd "<mouse-1>")) nil))
-      (should (eq (lookup-key mouse-trap-mode-map (kbd "<wheel-up>")) 'ignore))
+      (should (eq (lookup-key mouse-trap-mode-map (kbd "<wheel-up>")) nil))
 
       ;; Keymap should be in minor-mode-map-alist
       (should (assq 'mouse-trap-mode minor-mode-map-alist)))))
@@ -68,10 +68,10 @@ the keymap based on the CURRENT major mode's profile."
       (mouse-trap-mode 1)
       (should mouse-trap-mode)
 
-      ;; Should have dashboard profile (primary-click)
+      ;; Should have dashboard profile (scroll+primary)
       (let ((map1 mouse-trap-mode-map))
-        (should (eq (lookup-key map1 (kbd "<mouse-1>")) nil))      ; allowed
-        (should (eq (lookup-key map1 (kbd "<wheel-up>")) 'ignore)) ; blocked
+        (should (eq (lookup-key map1 (kbd "<mouse-1>")) nil))     ; allowed
+        (should (eq (lookup-key map1 (kbd "<wheel-up>")) nil))    ; allowed
 
         ;; Disable
         (mouse-trap-mode -1)