feat(coding-agent): add GLM 5.2 prompt preset

[code-yeongyu]

Summary

• Added a GLM 5.2 prompt preset and made promptPreset: "glm-5.2" a valid setting.
• Wired auto-detection for GLM 5.2 model IDs, including glm-5.2, glm-5p2, and built-in catalog aliases.
• Added focused resolver coverage and a changelog entry.

Session Continuation

• Found the originating OpenCode subagent session: ses_1272a3168ffe1Fzuno79wzxDDy.
• Parent session: ses_127369e3affeFbgVrx2Gu8uP0p.
• The subagent marked its internal todos completed and left a final implementation report, but it had not shipped the remaining work through PR/merge workflow.

Verification

• local-ignore/qa-evidence/20260618-glm52-preset/focused-test.txt
  • cd packages/coding-agent && npx tsx ../../node_modules/vitest/dist/cli.js --run test/suite/prompt-presets-glm-5-2.test.ts
  • Result: 1 file passed, 10 tests passed.
• local-ignore/qa-evidence/20260618-glm52-preset/npm-run-check.txt
  • npm run check
  • Result: passed. The command still reports existing Biome useLiteralKeys info diagnostics outside this change.
• local-ignore/qa-evidence/20260618-glm52-preset/runtime-qa.txt
  • node .agents/skills/senpi-qa/scripts/mock-loop.mjs --run "Reply with GLM preset QA marker" --api openai-completions --evidence 20260618-glm52-preset
  • node .agents/skills/senpi-qa/scripts/cli-smoke.mjs --self-test
  • Result: mock-loop returned the marker through the real CLI, CLI smoke passed 5/5, real auth unchanged.

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Summary by cubic

Added a GLM 5.2 prompt preset to packages/coding-agent. Auto-detects GLM 5.2 model IDs and allows forcing via promptPreset: "glm-5.2".

• New Features
  • Auto-routes when model ID signals glm-5.2 (e.g., glm-5.2, glm-5p2, and catalog aliases).
  • Introduces buildGlm52Prompt and updates resolver/settings; tests cover auto-detect and manual override.

^{Written for commit 81c90e6. Summary will update on new commits.}