Priority gap analysis

🔴 Critical gaps (must-have, missing)

#	Feature	Impact	Effort
1	File attachments in compose	Can't send attachments — major blocker	Medium
2	Edit/delete calendar events	Can only create, not manage events	Low
3	Undo for destructive actions	Risk of accidental data loss	Medium
4	Multi-select + bulk UI toolbar	API exists but no UI; limits productivity	Medium
5	Toast notifications	No feedback on actions	Low
6	Next/prev navigation in thread	Must return to list to read next email	Low

🟡 High-value gaps (nice-to-have)

#	Feature	Impact	Effort
7	Keyboard shortcuts	Power users expect j/k/e/r navigation	Medium
8	Rich text editor	Plain text only limits formatting	Medium
9	Recipient autocomplete	Typing full addresses is slow/error-prone	Medium
10	Day/Month calendar views	Week-only is limiting	Medium
11	Mobile responsive improvements	Mobile experience is poor	High
12	Draft autosave (JS timer)	Risk of losing composed emails	Low

🟢 Power user gaps (future roadmap)

#	Feature	Impact	Effort
13	Snooze emails	Workflow optimization	High
14	Email rules/filters UI	Automation	High
15	Contacts management	Currently no contacts	High
16	Schedule send	Timing control	Medium
17	Command palette	Power user speed	Medium
18	Offline support	Reliability	High
19	Theme/dark mode	User preference	Low