Import cc-switch MCP servers selectively

[SivanCola]

Summary

Adds a focused cc-switch MCP import path without bringing over the closed v1 desktop port:

• reasonix mcp import imports Codex-enabled MCP servers from cc-switch into Reasonix config.
• /mcp import in chat opens a selectable picker so risky or personal servers can be left unchecked.
• Supports the current cc-switch SQLite store and legacy JSON backups.
• Treats an existing but empty SQLite DB as authoritative, avoiding stale backup imports.

Root Cause

Users who already curate MCP servers in cc-switch had to re-enter those servers manually in Reasonix. The previous large PR mixed this useful import behavior with a wholesale v1 desktop frontend port, making the valuable MCP piece hard to review and merge independently.

Technical Approach

This PR keeps the change scoped to MCP import and config mutation:

• Reads ~/.cc-switch/cc-switch.db with deterministic ORDER BY name filtering on Codex-enabled servers.
• Falls back to legacy config.json, config.json.migrated, and config.json.bak only when the SQLite DB is absent.
• Maps cc-switch server specs onto existing config.PluginEntry values and validates them through the existing plugin validator.
• Adds a chat picker that defaults obviously risky candidates unchecked, while still allowing explicit selection.
• Persists selected entries and attempts a live connection for the selected import, without changing startup behavior by itself.

Focused Optimization Points

• Keeps successful import ordering deterministic.
• Does not introduce auto_start semantics in this PR.
• Does not touch internal/boot or plugin startup behavior.
• Does not include any v1 frontend files, compatibility CSS, screenshots, attachments, or autoscroll changes.

Cache / Tool Schema Notes

This PR does not change the default provider-visible tool schema during normal startup. Tool schema changes only happen after an explicit user action (/mcp import) or on the next session after imported MCP servers are present in config, which matches existing MCP add behavior.

Verification

Passed:

• go test ./internal/config ./internal/control ./internal/cli
• go test ./internal/agent -run TestPlanModeDoesNotMutateSystemOrTools
• go test ./internal/plugin ./internal/config ./internal/control ./internal/cli

Also ran go test ./...; it failed in internal/boot TestBuildDiscoversSkills because this local machine's global skills were discovered and included in the boot prompt. The failure is environment-dependent and unrelated to this PR's MCP import changes.

[chatgpt-codex-connector]

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