feat: implement comprehensive meeting attendance tracking system

- Add database schema for meetings, meeting events, and attendance
  - New enums: meeting_status, meeting_event_type, attendance_event_type, scan_method
  - New tables: meeting, meeting_event, attendance with proper relations
  - Indexes on meeting_id and user_id for performance

- Implement server-side logic
  - Share token generation for meetings
  - Secure redirect validation for auth flows
  - Meeting state management (upcoming/ongoing/recess/finished)

- Add admin UI for meetings management
  - List/create meetings page with status badges
  - Meeting detail page with event timeline and status transitions
  - Attendees page with filtering, search, and CSV export
  - QR code scanner page for check-in/check-out using qr-scanner library
  - Manual check-in/check-out functionality

- Features
  - Automatic toggle between CHECK_IN/CHECK_OUT based on current status
  - Meeting recess support with optional bulk check-out
  - Real-time attendance tracking with timestamps
  - Export attendance data to CSV
  - Comprehensive E2E tests for all workflows

- Add translations (fi/en) for meetings UI
- Add navigation item for Meetings in admin sidebar

This is phase 2 of the QR code system - focuses on admin tools for
meeting attendance. Phase 1 (member QR verification) already merged.
Phase 3 (public attendance sharing) will come later.

Author: claude

drizzle/0011_gray_warlock.sql

@@ -0,0 +1,42 @@
+CREATE TYPE "public"."attendance_event_type" AS ENUM('CHECK_IN', 'CHECK_OUT');--> statement-breakpoint
+CREATE TYPE "public"."meeting_event_type" AS ENUM('START', 'RECESS_START', 'RECESS_END', 'FINISH');--> statement-breakpoint
+CREATE TYPE "public"."meeting_status" AS ENUM('upcoming', 'ongoing', 'recess', 'finished');--> statement-breakpoint
+CREATE TYPE "public"."scan_method" AS ENUM('qr_scan', 'manual');--> statement-breakpoint
+CREATE TABLE "attendance" (
+	"id" text PRIMARY KEY NOT NULL,
+	"meeting_id" text NOT NULL,
+	"user_id" text NOT NULL,
+	"event_type" "attendance_event_type" NOT NULL,
+	"scan_method" "scan_method" NOT NULL,
+	"scanned_by" text NOT NULL,
+	"timestamp" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "meeting" (
+	"id" text PRIMARY KEY NOT NULL,
+	"name" text NOT NULL,
+	"description" text,
+	"status" "meeting_status" DEFAULT 'upcoming' NOT NULL,
+	"started_at" timestamp with time zone,
+	"finished_at" timestamp with time zone,
+	"share_token" text,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL,
+	CONSTRAINT "meeting_shareToken_unique" UNIQUE("share_token")
+);
+--> statement-breakpoint
+CREATE TABLE "meeting_event" (
+	"id" text PRIMARY KEY NOT NULL,
+	"meeting_id" text NOT NULL,
+	"event_type" "meeting_event_type" NOT NULL,
+	"notes" text,
+	"timestamp" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "attendance" ADD CONSTRAINT "attendance_meeting_id_meeting_id_fk" FOREIGN KEY ("meeting_id") REFERENCES "public"."meeting"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "attendance" ADD CONSTRAINT "attendance_user_id_user_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."user"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "attendance" ADD CONSTRAINT "attendance_scanned_by_user_id_fk" FOREIGN KEY ("scanned_by") REFERENCES "public"."user"("id") ON DELETE no action ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "meeting_event" ADD CONSTRAINT "meeting_event_meeting_id_meeting_id_fk" FOREIGN KEY ("meeting_id") REFERENCES "public"."meeting"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "idx_attendance_meeting_id" ON "attendance" USING btree ("meeting_id");--> statement-breakpoint
+CREATE INDEX "idx_attendance_user_id" ON "attendance" USING btree ("user_id");--> statement-breakpoint
+CREATE INDEX "idx_meeting_event_meeting_id" ON "meeting_event" USING btree ("meeting_id");