Add missing tasks button and fix tasks routes

[joanagmaia]

Changes proposed ✍️

What

🤖 Generated by Copilot at 0ff3e34

This pull request updates the frontend to show suggested tasks even when there are no open tasks, and to use a consistent plural form for the task routes. It modifies dashboard-task.vue and task-routes.js accordingly.
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🤖 Generated by Copilot at 0ff3e34

v-if condition gone
UI more consistent
suggested tasks show

Why

How

🤖 Generated by Copilot at 0ff3e34

• Change the route for the TaskPage component to use the plural form /tasks and add a redirect from the old route /task (link)
• Remove the v-if condition from the div element that contains the open tasks and the suggested tasks in the DashboardTask component to show them regardless of the open tasks count (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screenshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.