Mistral Vibe MCP config support

[LittleCoinCoin]

Features

Mistral Vibe MCP host support

Adds full MCP host support for Mistral Vibe, covering the complete adapter contract:

• MCPHostType.MISTRAL_VIBE enum value and MISTRAL_VIBE_FIELDS constant — TOML-native field set: transport, prompt, sampling_enabled, api_key_env, api_key_header, api_key_format, plus universal and timeout fields
• MistralVibeAdapter — validates exactly-one transport (command XOR url), derives the Vibe-native discriminator (stdio / http / streamable-http) from canonical MCP fields; cross-host sync supported by promoting httpUrl to url at serialize time
• MistralVibeHostStrategy — reads/writes TOML [[mcp_servers]] array-of-tables; project-local .vibe/config.toml takes precedence over user-global ~/.vibe/config.toml; normalizes transport ↔ type on read for round-trip compatibility
• New MCPServerConfig fields: transport (host-native discriminator), prompt, sampling_enabled, api_key_env, api_key_header, api_key_format; startup_timeout_sec / tool_timeout_sec widened from int to float; transport predicates (is_local_transport etc.) consult transport before type — backward-compatible with all existing hosts
• Wired into all integration points: adapter __init__, AdapterRegistry, BackupInfo, reporting, and EnvironmentPackageEntry.validate_host_names()
• _apply_mistral_vibe_cli_mappings() translates generic CLI flags to Vibe-native fields: --bearer-token-env-var maps to api_key_env + Authorization header; --env-header capped at one mapping; --cwd suppressed; new exclusive flags: --prompt, --sampling-enabled, --api-key-env, --api-key-header, --api-key-format
• Auto-generates test cases from data-driven fixtures: adapter unit tests, strategy unit tests, cross-host regression field-filtering tests

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Bug Fixes

Claude URL-based remote config missing transport field (fix(mcp-hosts))

ClaudeAdapter.serialize() was not emitting "type": "http" for URL-based remote server configs — downstream consumers had no way to distinguish remote Claude configs from stdio ones by inspecting the serialized output alone.

• ClaudeAdapter.serialize() now explicitly sets filtered["type"] = "http" whenever "url" is present in the filtered output
• Removed the stale CLI-level guard that rejected --url for claude-desktop / claude-code; transport validation is the adapter's responsibility, not the CLI's
• New regression fixture claude_transport_regressions.json and test_claude_transport_serialization.py pin the correct URL-based serialization behaviour for Claude Desktop, Claude Code, and Claude remote configurations

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Developer Experience

CI release pipeline streamlining

Consolidated the release, publish, and Discord-notify chain into a single orchestrated workflow:

• semantic-release.yml now owns the full pipeline: test → release → publish → notify-discord; standalone prerelease-discord-notification.yml and release-discord-notification.yml removed
• release job exposes published and tag outputs; publish fires only when published == 'true'; notify-discord fires only when publish succeeds
• publish.yml migrated from push.tags trigger to workflow_call + workflow_dispatch, consuming tag directly from the release job — eliminates the redundant manual checkout step
• Both test and release jobs skip themselves on chore(release): bump commits, preventing self-triggering loops

Documentation updates

• Supported platforms page and CLI API reference updated to include Mistral Vibe
• Corrected Mistral Vibe terminology from "agent" to "CLI coding agent" across docs