refactor: complete three-layer serial refactoring (knowledge→schema→renderer)

Step 1 — Knowledge base: perfect all reference/*.md with type, range, default, unit
- text.md: add DataOrPathProps, path/data, bullet deprecated params
- chart.md: add deprecated section, fix 19 params with missing elements
- slide.md: add bkgd→background deprecated mapping
- output.md: add masterSlide, presLayout

Step 2 — Schema: align schema/presentation.schema.json with KB
- Add catAxisItem and valAxisItem definitions with full sub-property constraints
- Fix 7 enum constraints (barDir, displayBlanksAs, bar3DShape, etc.)
- Add 4 missing fields (verbose, autoPageCharWeight, autoPageLineWeight, notes,
  masterSlide, presLayout)

Step 3 — Translation engine: transform renderers from passthrough to validation
- index.js: add normalizePosition, normalizeColor, validateEnum shared utilities
- All renderers: position validation, color hex normalization, enum validation
- Image: graceful failure handling (catch load errors, warn, continue)
- Chart: chartType enum validation, data parity check
- Table: colspan/rowspan integer validation, border array check
- Full verification: basic.json and full.json generate valid PPTX

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

reference/text.md

@@ -1,6 +1,6 @@
 # 文字参数 (Text Props)
 
-文字参数来自 `TextPropsOptions`（继承 `TextBaseProps`、`PositionProps`、`ObjectNameProps`）和 `TextGlowProps`，用于 `slide.addText()` 方法。
+文字参数来自 `TextPropsOptions`（继承 `TextBaseProps`、`PositionProps`、`DataOrPathProps`、`ObjectNameProps`）和 `TextGlowProps`，用于 `slide.addText()` 方法。
 
 ---
 
@@ -131,6 +131,16 @@
 
 ## 文字专有属性 (TextPropsOptions 特有)
 
+继承 `DataOrPathProps`，支持以下嵌入图片的属性：
+
+- **path**：图片路径
+  - 类型：`string`
+  - 说明：URL 或本地路径，可在文本框中嵌入图片
+
+- **data**：图片 Base64 数据
+  - 类型：`string`
+  - 说明：Base64 编码的图片数据，替代 `path`
+
 - **baseline**：基线偏移
   - 类型：`number`
 
@@ -231,7 +241,7 @@
 - **lineSpacingMultiple**：行间距（倍数）
   - 类型：`number`
   - 取值范围：`0.0`–`9.99`
-  - 单位：百分比倍数
+  - 单位：倍数（非百分比）
   - 说明：PowerPoint 段落 > 缩进和间距 > 行距 > "多倍行距"
   - 示例：`1.5`（1.5 倍行距）
   - 始于：v3.5.0
@@ -385,6 +395,10 @@
 | `autoFit` | `fit` | v3.3.0 |
 | `shrinkText` | `fit` | v3.3.0 |
 | `inset` | `margin` | v3.10.0 |
+| `bullet.code` | `bullet.characterCode` | v3.3.0 |
+| `bullet.marginPt` | `bullet.indent` | v3.3.0 |
+| `bullet.startAt` | `bullet.numberStartAt` | v3.3.0 |
+| `bullet.style` | `bullet.numberType` | v3.3.0 |
 | `lineDash` | `line.dashType` | v3.3.0 |
 | `lineHead` | `line.beginArrowType` | v3.3.0 |
 | `lineSize` | `line.width` | v3.3.0 |