settings: generate CLI settings from SDK schema

[neubig]

Summary

• replace the CLI's duplicated settings definitions with schema-driven rendering from AgentSettings.export_schema()
• generate slash commands and help text from the shared SDK settings metadata instead of hand-maintained CLI definitions
• point pyproject.toml directly at the software-agent-sdk issue branch so the PR can consume the new schema before a release is cut
• resolve follow-up review feedback by removing implicit API-key merge-on-save behavior, switching to direct SDK imports, and sharing argument-hint formatting across CLI/ACP settings commands

Dependencies

• depends on the SDK schema changes in OpenHands/software-agent-sdk
• installs openhands-sdk, openhands-tools, and openhands-workspace from OpenHands/software-agent-sdk@openhands/issue-2228-sdk-settings-schema

Testing

• uv run pytest tests/shared/test_settings_commands.py tests/stores/test_programmatic_settings.py tests/acp/test_slash_commands.py -q
• make lint
• make test
• make test-binary

Fixes

Fixes OpenHands/software-agent-sdk#2228

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🚀 Try this PR

uvx --python 3.12 git+https://github.com/OpenHands/OpenHands-CLI.git@openhands/issue-2228-cli-settings-schema

[all-hands-bot]

Taste Rating: 🟡 Acceptable - Solves a real problem (settings duplication) with a pragmatic schema-driven approach. Core logic is sound, but there are data ownership concerns and some unnecessary complexity around API key preservation.

[github-actions]

Coverage Report •

File	Stmts	Miss	Cover	Missing
openhands_cli/acp_impl
slash_commands.py	68	1	98%	57
openhands_cli/acp_impl/agent
base_agent.py	262	32	87%	143, 186, 227, 337–339, 410, 417–418, 423, 444–447, 451–458, 483, 567–568, 571–572, 653, 729–731, 760
local_agent.py	86	4	95%	81, 145, 155, 169
remote_agent.py	148	63	57%	85–86, 92–93, 97–98, 102, 104–108, 111–113, 123–124, 127–129, 133–135, 145–146, 161–163, 167, 169–170, 176, 180–181, 183, 192–193, 198–200, 211–212, 217, 219–220, 224, 231–232, 234–235, 238–240, 242, 250, 252–253, 287, 352–354, 360–361
openhands_cli/acp_impl/utils
mcp.py	25	4	84%	65–68
openhands_cli/shared
settings_commands.py	105	66	37%	51–53, 55–58, 65–73, 77, 101–108, 112–116, 118–124, 128–132, 136–145, 153–159, 163–169
openhands_cli/stores
__init__.py	4	0	100%
programmatic_settings.py	37	0	100%
openhands_cli/tui/core
commands.py	49	2	95%	38, 61
openhands_cli/tui/modals/settings/components
cli_settings_tab.py	32	0	100%
openhands_cli/tui/widgets
input_area.py	80	29	63%	75, 77–97, 101–102, 108, 118, 135–136, 152
openhands_cli/tui/widgets/user_input
input_field.py	172	11	93%	288, 303, 306–307, 316–317, 319, 350–351, 372–373
TOTAL	6859	1009	85%