Refresh README and agent docs

[sparkleMing]

Summary: Refresh README/README_CN to reflect current Memex Agent, provider, custom agent, roadmap, and architecture/data-flow wording. Update AGENTS.md with current local-first, workspace, StatefulAgent hook, and SuperAgent child-agent guidance. Validation: git diff --check -- README.md README_CN.md AGENTS.md. App tests not run; documentation-only changes.

[github-actions]

PR AI Review / PR AI 语义预检

中文

• 风险等级：高风险
• 需要人工审核：是
• 黄金链路影响：可能
• 置信度：high
• Workflow run：28429791303

AI 语义预检未得到可解析结果，需要 maintainer 人工审核。

影响范围

• unknown

黄金链路

• none
• 说明：Claude Code Action 未产出结构化 JSON，AI 语义预检结果不可用。

风险项

• high AI review 结果不可用。证据：Claude Code Action structured_output was empty or invalid.。
  建议：检查 Claude Action 日志和模型网关配置后重新运行 workflow。

测试缺口

• 未发现新的测试缺口。

English

• Risk level: HIGH
• Human review required: YES
• Golden path impact: POSSIBLE
• Confidence: high
• Workflow run: 28429791303

AI semantic review did not return a parseable result; maintainer review is required.

Affected Areas

• unknown

Golden Path

• none
• Rationale: Claude Code Action did not produce structured JSON, so the AI review result is unavailable.

Findings

• high AI review result unavailable. Evidence: Claude Code Action structured_output was empty or invalid..
  Recommendation: Check Claude Action logs and model gateway configuration, then rerun the workflow.

Test Gaps

• No new test gap was reported.

AI review is advisory. Maintainers should verify the result before merging.

[github-actions]

PR Preflight Summary / PR 预检汇总

中文

• 统一结论：低风险：两个预检均已完成，质量预检通过，可走普通手动合并流程。
• Policy preflight：低风险。未命中打回或高风险规则。
• Flutter quality：通过。Analyzer 和 test baseline 均未发现新增问题。
• PR head：2f6f53c247f4b347c8116b14eebc157ddb1b191b
• Policy run：28429791312
• Flutter run：28429793094

English

• Combined result: Low risk: both preflights completed and quality passed; use the normal manual merge flow.
• Policy preflight: LOW RISK. No blocking or high-risk policy signal was found.
• Flutter quality: PASS. Analyzer and test baselines found no newly introduced issue.
• PR head: 2f6f53c247f4b347c8116b14eebc157ddb1b191b
• Policy run: 28429791312
• Flutter run: 28429793094

PR Policy Preflight / PR 规则预检

PR Policy Preflight / PR 规则预检

中文

• 判定：低风险
• 变更文件数：5
• 变更行数：1026
• Diff 是否截断：false

未发现确定性规则问题。

English

• Decision: LOW RISK
• Changed files: 5
• Changed lines: 1026
• Diff truncated: false

No deterministic policy findings.

PR Flutter Quality / Flutter 质量预检

PR Flutter Quality / Flutter 质量预检

中文

• 总体：通过
• Analyzer baseline：通过
• Test baseline：通过

English

• Overall: PASS
• Analyzer baseline: PASS
• Test baseline: PASS

Flutter Analyzer Baseline

• Base issues: 182
• PR issues: 182
• New issues: 0

No new analyzer issues introduced by this PR.

Flutter Test Baseline

• Base failures: 1
• PR failures: 1
• New failures: 0

No new Flutter test failures introduced by this PR.