fix: task date tools expose only start + due (drop the UI-invisible end_date) - EXO-88465

[bmestrallet]

Follow-up to #620 addressing @jihed_chabbeh's report on EXO-88465: "setting start + end date on the same prompt sets only the start date; afterwards the end date can't be set by AI."

Root cause

A task has three persisted date columns (START_DATE / END_DATE / DUE_DATE), but the eXo Task UI only shows "Start Date" + "Due date", and that "Due date" binds to dueDate (TaskFormDatePickers.vue v-model="dueDate" → TaskDrawer.vue updateTaskDueDate sets task.dueDate). The UI never reads or writes endDate — it is vestigial.

The MCP tools, however, exposed a separate end_date that writes endDate. So when a user asked EVA to set the "end date", the agent wrote the field the UI doesn't display → the visible "Due date" stayed empty ("only start was set / end can't be set"). Reproduced live: set_task_dates(start, end) sets both fields server-side, but the UI shows only Start because it reads dueDate (which was never set); workload = due − start, confirming dueDate is the canonical end-of-window.

Fix

Align the AI tools to the UI — expose only start_date + due_date:

• Removed the end_date parameter + setEndDate(...) from set_task_dates, create_task_in_project, create_personal_task (Javadoc updated; endDate left untouched elsewhere for legacy code).
• Removed end_date from those three tools in ai-tool-definitions.json; corrected the set_task_dates description from "omit a date to clear it" → "omitting a date leaves it unchanged" (the patch semantics from fix: set_task_dates wipes other dates (patch semantics) - EXO-88465 #620).

Now "set the end/due date" via EVA writes dueDate — the field the UI shows.

Tests

TaskMcpToolTest updated to the new signatures; kept the start-only patch regression and added a due-only one (updates due, never touches start/end). mvn test -pl services -Dtest=TaskMcpToolTest → 55 run, 0 failures. Verified the UI→dueDate binding in the Vue components before removing anything.

🤖 Generated with Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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