Enhance cell biology documentation with annotations, images, and protocols

[RainPPR]

Summary by cubic

扩充细胞生物学文档，加入实验步骤、教学注释与20+张配图，并重组章节以优化教学流程。新增核酸/蛋白质专题内容、膜与生理补充、以及分泌与降解路径说明。

• New Features

  • 充实 docs/science/cell/1.md：加入版本注释（沪科/浙科/苏教），分光光度法，Na/Cl 等元素说明与精准施肥，甲基绿–派洛宁染色（含缓冲液 pH/步骤），尿蛋白试纸与双缩脲试剂使用顺序，核酸中特殊碱基 5‑BrdU/Z/I，蛋白质结构/变性、纤维状/球状、持家/奢侈、结合蛋白与泛素–蛋白酶体通路，“甜味”机理与配图。
  • 更新 docs/science/cell/{2,3}.md：补充显微镜与膜生物学（含“人工膜”）、渗透/扩散、原生质/原生质层术语与示例，并插图说明。
  • 插入图像 docs/science/cell/image-1.png … image-22.png 与 image.png；完善 RNA/DNA 起源与病毒相关说明，补充 docs/science/species/{1,2}.md 注释。

• Refactors

  • 删除 docs/science/cell/4.md 并并入 1–3 章；按评审建议统一用词/编号与格式，微调 docs/science/element/fe.md 与 docs/science/species/{1,2}.md。
  • 更新 .vscode/settings.json（开启 format‑on‑save、on‑paste、on‑type，启用 markdown.validate.enabled）。

^{Written for commit 2576932. Summary will update on new commits.}

[llamapreview]

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[gemini-code-assist]

Code Review

This pull request reorganizes and expands the biology documentation, primarily consolidating content on cell elements, water, nucleic acids, and proteins into docs/science/cell/1.md while removing redundant sections from docs/science/cell/4.md. It also updates VS Code settings and adds curriculum-specific notes to the species documentation. The review feedback highlights several content and terminology errors in the newly added text, such as the incorrect classification of sodium and chlorine as macroelements, multiple typos (e.g., '机盐离子' and 'carbohy- drates'), non-standard chemical terminology (using '胺' instead of '氨' and '脢' instead of '酶'), the use of non-standard Kangxi radical characters, and an abruptly cut-off sentence.

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[gemini-code-assist]

In Chinese high school biology textbooks (such as the PEP and Zhike versions), macroelements (大量元素) are explicitly defined as C, H, O, N, P, S, K, Ca, Mg (9 elements). Classifying Na and Cl as macroelements is inconsistent with standard curriculum definitions and may mislead students or readers. It is recommended to remove Na and Cl from the macroelements list.

Suggested change

	细胞中常见的化学元素中，含量较多的有 C、H、O、N、P、S、K、Ca、Mg、Na、Cl 等元素，称为大量元素；有些元素含量很少，如 Fe、Mn、Zn、Cu、B、Mo、Ni、Co、Se 等，称为微量元素。
	细胞中常见的化学元素中，含量较多的有 C、H、O、N、P、S、K、Ca、Mg 等元素，称为大量元素；有些元素含量很少，如 Fe、Mn、Zn、Cu、B、Mo、Ni、Co、Se 等，称为微量元素。

[cubic-dev-ai]

7 issues found across 31 files

Confidence score: 4/5

• In docs/science/cell/1.md, there are concrete content-accuracy issues (e.g., “机盐离子” missing “无”, and the large-element list including Na/Cl against common textbook conventions) that could mislead learners if merged as-is — correct these biology terms and align the list with the intended curriculum standard before merging.
• docs/science/cell/1.md contains an incomplete definition that breaks at “发生特定的”, which leaves a key concept unfinished and can confuse readers — complete the sentence so the definition is self-contained before merging.
• docs/science/cell/1.md has multiple terminology/orthography consistency problems (nonstandard spellings, variant glyphs, “氨基/胺基”, and split “carbohy- drates”) that hurt searchability and editorial quality — run a terminology/style pass to normalize wording and character forms before merging.

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[cubic-dev-ai]

1 issue found across 1 file (changes from recent commits).

<sub>Tip: Review your code locally with the cubic CLI to iterate faster.

Re-trigger cubic</sub>