feat: bump default execution timeout 15min → 60min (#665)

[dolho]

Summary

Default chat/task execution timeout was 15min (900s). Long research runs, multi-step code generation, and batch processing routinely hit the wall — the silent truncation looks like success until the user notices. 60min matches the upper bound of what agents are expected to do autonomously.

Per-agent override at PUT /api/agents/{name}/timeout (range 60–7200s) unchanged; only the default moves.

Scope (slight extension over issue text)

Column	Before	After
agent_ownership.execution_timeout_seconds	900	3600
agent_schedules.timeout_seconds	900	3600

Issue text only specified the agent column. But the watchdog query at db/schedules.py:1800 resolves timeout via COALESCE(s.timeout_seconds, ao.execution_timeout_seconds, 3600) — without bumping the schedule column too, new scheduled tasks would pick up 900 from the per-schedule override before the agent's 60min default kicked in. The PR fixes both for consistency.

Migration

_migrate_default_execution_timeout_to_3600:

• UPDATE agent_ownership SET execution_timeout_seconds = 3600 WHERE execution_timeout_seconds = 900
• Same for agent_schedules.timeout_seconds
• Operator-customised values (everything except 900) untouched.
• Idempotent.

SQLite gotcha + explicit INSERT

SQLite stores column DEFAULTs at column-creation time. Changing DEFAULT 900 to DEFAULT 3600 in schema.py only affects fresh installs — on existing instances the column still has 900 baked in, so new INSERTs without explicit value pick up 900.

Fix: register_agent_owner now passes execution_timeout_seconds = 3600 explicitly on INSERT. Works on both fresh and upgraded installs.

Files

• src/backend/db/schema.py — both column defaults
• src/backend/db/migrations.py — bump migration
• src/backend/db/agents.py — explicit INSERT value (the load-bearing fix on upgraded installs)
• src/backend/db/agent_settings/resources.py — COALESCE fallbacks + docstrings + return-default → 3600
• src/backend/db/schedules.py — row-to-Schedule fallback + watchdog COALESCE final fallback
• src/frontend/src/components/SchedulesPanel.vue — 4 form-defaults + dropdown "(default)" label moved to 1 hour
• src/frontend/src/components/TasksPanel.vue — localStorage fallback

Live verification

1. Backend reloaded → migration ran
2. Pre-existing rows: 13 at 900 → 0 at 900, 13 moved to 3600 ✓
3. New agent created post-PR: execution_timeout_seconds = 3600 ✓
4. Per-agent override (PUT /timeout) still validates range 60–7200s ✓

Test plan

• Migration runs cleanly on backend reload
• Existing 900-rows bumped to 3600 in both agent_ownership and agent_schedules
• New agents inserted via API get 3600 explicitly
• Per-agent timeout override still works
• UI dropdown shows "1 hour (default)" instead of "15 minutes (default)"
• CI: lint + 6-seed pytest matrix + regression diff

Closes #665

🤖 Generated with Claude Code