calfw: add 'a' keybinding for org-capture + calendar event template

- New capture template 'c' creates SCHEDULED entry on selected date
- calfw-org-capture-template set for calfw integration
- Events go to calendar_outbox.org (synced via org-caldav twoway)
- Keybinding: a = add event, RET = open agenda day

config.el

@@ -317,7 +317,12 @@
           ("w" "Weight" table-line
            (file+headline ,(ms/org-file "metrics.org") "Weight")
            "| %U | %^{Weight} | %^{Notes} |"
-           :kill-buffer t))))
+           :kill-buffer t)
+
+          ("c" "Calendar event" entry
+           (file ,(ms/org-file "calendar_outbox.org"))
+           "* %?\nSCHEDULED: %(calfw-org-capture-day)\n"
+           :empty-lines 1))))
 
 
 ;;; ============================================================
@@ -1587,6 +1592,12 @@ Skip for beamer exports — beamer uses adjustbox on plain tabular."
 (use-package! calfw-org
   :demand t
   :config
+  ;; org-capture integration: "a" to add event on selected date
+  (setq calfw-org-capture-template
+        '("c" "Calendar event" entry
+          (file "~/org/calendar_outbox.org")
+          "* %?\nSCHEDULED: %(calfw-org-capture-day)\n"))
+
   ;; Evil normal state for calfw (SPC = Doom leader works)
   (evil-set-initial-state 'calfw-calendar-mode 'normal)
   (evil-set-initial-state 'calfw-details-mode 'normal)
@@ -1603,6 +1614,7 @@ Skip for beamer exports — beamer uses adjustbox on plain tabular."
     "M"   #'calfw-change-view-month
     "D"   #'calfw-change-view-day
     "TAB" #'calfw-navi-next-item-command
+    "a"   #'org-capture
     "q"   #'bury-buffer
     "x"   #'calfw-org-clean-exit
     "RET" #'calfw-org-open-agenda-day