docs(showcase): add public qlockify showcase + screenshots

docs/features.md

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+# Features
+
+## Time Tracking
+
+- Live timer for active work sessions
+- Manual time entry for missed or corrected work
+- Billable and non-billable tracking
+- Project, client, and tag attribution
+- Mobile-friendly timesheet interactions
+
+## Workspace Management
+
+- Workspace roles for owners, admins, members, and guests
+- Member management and bulk member import
+- Project access control for normal workspace users
+- Workspace and project-level hourly rates
+
+## Reporting
+
+- Table and chart report views
+- All-users summary reports for admins and owners
+- Per-user daily summaries
+- Client, project, and tag breakdowns
+- Excel and PDF exports with localized Persian/English output
+
+## Authentication
+
+- Mobile-first auth flow
+- Password login
+- OTP login and password recovery
+- Google OAuth account linking with mobile confirmation
+- Isolated demo entry for public product trials
+
+## Operations
+
+- Dockerized production deployment
+- Background workers and scheduled cleanup jobs
+- Encrypted backup flow to S3-compatible object storage
+- Audit logs and notifications
+