feat: add delete account button in settings, implement all remaining achievements

- Add delete all data button with red danger style and confirmation prompt
- Add DeleteUserData repo method that wipes user from all tables in a transaction
- Add helper methods deleteAccountPrompt and deleteAccountConfirm
- Implement consistency_master, perfect_week, remote_veteran, onsite_master achievements
- Add GetDailyXPInRange and SumWorkSecondsByWorkType repo methods
- Update Dockerfile to alpine3.23, docker-compose to use env vars for proxy/paths

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.26.4-alpine AS builder
+FROM golang:1.26.4-alpine3.23 AS builder
 
 WORKDIR /src
 
@@ -12,7 +12,7 @@ RUN go mod download
 COPY . .
 RUN go build -o /usr/local/bin/worktime-bot ./cmd/bot/
 
-FROM alpine:3.18
+FROM alpine:3.23
 
 RUN apk add --no-cache ca-certificates tzdata