Add Fastmail email and calendar, multi-account neomutt

- mbsync: add Fastmail IMAP channel (rbw for credentials)
- msmtp: add Fastmail SMTP account
- neomutt: add fastmail account file, F2/F3 account switching macros
- vdirsyncer + khal: Fastmail CalDAV calendar sync
- zshrc: restore calsync alias

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

laptop/.config/neomutt/accounts/fastmail

@@ -0,0 +1,17 @@
+set realname  = "Rob Harbaugh"
+set from      = "rob@rharbaugh.com"
+
+set mbox_type = Maildir
+set folder    = ~/mail/fastmail
+set spoolfile = +Inbox
+set postponed = +Drafts
+set trash     = +Trash
+
+set sendmail      = "/usr/bin/msmtp -a fastmail"
+set envelope_from = yes
+set sendmail_wait = 0
+
+set signature = ~/.config/neomutt/signature
+
+unmailboxes *
+mailboxes =Inbox =Drafts =Sent =Trash =Archive

laptop/.config/neomutt/accounts/personal

@@ -8,8 +8,9 @@ set postponed	=	+Drafts
 set trash	=	+Trash
 
 set signature	=	~/.config/neomutt/signature
-set sendmail	=	"/usr/bin/msmtp"
+set sendmail	=	"/usr/bin/msmtp -a outlook"
 set envelope_from = yes
 set sendmail_wait	=	0
 
+unmailboxes *
 mailboxes =Inbox =Drafts =Sent =Archive =Trash =Church =Family =House =Work =Notes

laptop/.config/neomutt/neomuttrc

@@ -88,3 +88,7 @@ color body  underline  color111  color235  "<[^ ]+@[^ ]+>"
 
 # Sidebar toggle
 bind index,pager B sidebar-toggle-visible
+
+# Account switching
+macro index <F2> '<sync-mailbox><enter-command>source ~/.config/neomutt/accounts/personal<enter><change-folder>!<enter><refresh>' "Switch to Outlook"
+macro index <F3> '<sync-mailbox><enter-command>source ~/.config/neomutt/accounts/fastmail<enter><change-folder>!<enter><refresh>' "Switch to Fastmail"