fix: backport upstream reliability batch

[e6qu]

Summary

• ported TypeScript LSP startup args to use the resolved native tsserver path and only add --ignore-node-modules when no project config exists
• ported MCP reliability fixes: close failed clients/transports and tolerate invalid outputSchema fields by retrying tools/list with a schema that ignores outputSchema
• bundled AGENTS/continuity updates so future work keeps docs in past tense and in implementation PRs

Notes

• confirmed webfetch timeout cleanup was already present
• skipped upstream shell truncation stream cleanup because Frankencode lacks upstream src/tool/shell.ts truncation stream architecture
• deferred interrupted assistant finalization and compaction tail restoration for dedicated session/compaction work

Verification

• cd packages/opencode && bun typecheck
• cd packages/opencode && bun test test/lsp/server.test.ts test/mcp/lifecycle.test.ts test/tool/webfetch.test.ts
• user-approved unsandboxed cd packages/opencode && bun test --timeout 30000 (1557 pass, 8 skip, 0 fail)
• commit/push hooks passed