chore(templates): GitHub issue 模板三件套

.github/ISSUE_TEMPLATE/bug.yml

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+name: 🐛 Bug 报告 / Bug Report
+description: 功能异常、崩溃、数据错误 — Create a bug report
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        感谢反馈！写之前先搜一下 [已有 issue](https://github.com/slow-stack/mneme/issues?q=is%3Aissue)，避免重复。
+        请尽量填写完整——环境信息不全的 bug 大概率要多花一个来回才能定位。
+        / Thanks for reporting! Please search existing issues first. Complete env info makes debugging much faster.
+
+  - type: textarea
+    id: observed
+    attributes:
+      label: 现象 / What happened
+      description: 具体表现是什么？与预期不符在哪？/ What did you see vs. what did you expect?
+    validations:
+      required: true
+
+  - type: textarea
+    id: repro
+    attributes:
+      label: 复现步骤 / Steps to reproduce
+      description: |
+        最小复现路径，例如：开了什么开关 → 做了什么操作 → 看到什么。
+        若涉及 LLM 行为（巩固/蒸馏/实体抽取失败），附 `llm_audit_logs` 对应行的 error_message 更好。
+        / Minimal repro path. For LLM-pipeline failures, the error_message from llm_audit_logs helps a lot.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: 期望行为 / Expected behavior
+    validations:
+      required: false
+
+  - type: textarea
+    id: env
+    attributes:
+      label: 环境 / Environment
+      value: |
+        - dsh-mneme 版本 / plugin version:
+        - DSH 桌面端版本与通道（stable / Beta / NEXT）/ DSH version & channel:
+        - 操作系统 / OS:
+        - Node 版本 / Node version:
+        - 安装方式 / install method (npm / dsh-market):
+        - 相关路由模型（巩固/蒸馏/实体抽取用的是什么模型）/ relevant model routes:
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: 日志 / Logs
+      description: 控制台报错、dream_runs / llm_audit_logs 记录片段。注意脱敏，不要贴 token 与记忆正文。
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: disclosure
+    attributes:
+      label: 披露 / Disclosure
+      options:
+        - label: 本报告由 AI 辅助整理（人工审核后提交）/ Drafted with AI assistance, reviewed by a human
+          required: false

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: 💬 Questions & Ideas（问答与方向讨论）
+    url: https://github.com/slow-stack/mneme/discussions
+    about: 使用问题（如「如何临时关闭记忆」）、配置咨询、方向性想法请发 Discussions 的 Q&A / Ideas 分类 — usage questions and direction-level ideas go to Discussions
+  - name: 🔒 Security vulnerabilities（安全漏洞）
+    url: https://github.com/slow-stack/mneme/security/advisories/new
+    about: 请勿公开发布安全漏洞，走 GitHub 私密安全通告 — do not open public issues for security reports

.github/ISSUE_TEMPLATE/feature.yml

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+name: ✨ Feature 提案 / Feature Request
+description: 新功能或行为改进 — Propose a new feature or behavior change
+labels: ["feature"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        写之前先搜 [已有 issue](https://github.com/slow-stack/mneme/issues?q=is%3Aissue) 与 [Discussions](https://github.com/slow-stack/mneme/discussions)——方向征询类的话题更适合先发 Discussion 聊出共识再立项。
+        / Search existing issues & Discussions first. Direction-level ideas fit a Discussion better.
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: 要解决的问题 / Problem
+      description: 先说场景与痛点，再提方案——问题定义比方案更重要。
+        / Describe the scenario and pain point first; the problem matters more than the solution.
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposal
+    attributes:
+      label: 期望的方案 / Proposed solution
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: 考虑过的替代方案 / Alternatives considered
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: gates
+    attributes:
+      label: 实现口径确认 / Implementation gates (维护者会逐项核对)
+      options:
+        - label: 新行为开关应 opt-in 默认关，注册进 settings 白名单 / new toggles opt-in by default + settings whitelist
+        - label: 涉及 schema 变更时需配幂等迁移 / idempotent migration for schema changes
+        - label: 接受带回归测试的验收线 / acceptance includes regression tests
+
+  - type: checkboxes
+    id: disclosure
+    attributes:
+      label: 披露 / Disclosure
+      options:
+        - label: 本提案由 AI 辅助整理（人工审核后提交）/ Drafted with AI assistance, reviewed by a human
+          required: false