T-DEBT-FLAT-IFC-FALLBACK-STRUT-NATURAL-HEIGHT
扁平 IFC 回退路径的根 strut 在 line-height:normal 时仍取字体自然高，与文字条目的 normal 行高不一致
验证范围
docs/known_issues.md:176
反馈此接口问题 →T-DEBT-FLEX-AUTO-MIN-WHOLE-PIXEL-CEIL
T-DEBT-FLEX-COLUMN-REPLACED-CROSS-STRETCH-RATIO
T-DEBT-FLEX-ITEM-GRID-BRANCH-CEIL-AFTER-GRID-FRACTIONAL-TRACKS
T-DEBT-FLEX-ITEM-GRID-FR-FIT-CONTENT-STILL-BY-TRIAL
flex item 本身是 / 包着列里有 fit-content() 的 grid（或显式列 + fr 隐式列）时，flex base 仍按无限宽试排的几何量
验证范围
docs/known_issues.md:60
反馈此接口问题 →T-DEBT-FONT-FALLBACK-COVERAGE-AND-GENERIC-SANS
webfont 缺字后的逐 glyph coverage 与 Windows generic sans fallback 顺序
验证范围
docs/known_issues.md:262
反馈此接口问题 →T-DEBT-FRAME-RADIUS-NONWINDOWS
T-DEBT-FULL-SUITE-LOAD-FLAKY-TESTS
T-DEBT-GENERATED-FIRST-LETTER-PSEUDO-DECORATION
T-DEBT-GENERIC-FALLBACK-CHROME-PARITY
T-DEBT-GEOMETRIC-LIST-MARKER-INLINE-ADVANCE-PARITY
T-DEBT-GORUST-CANONICAL-MANIFEST-UNGATED
T-DEBT-GRID-ANONYMOUS-PRESERVED-EDGE-SHAPING-PARITY
T-DEBT-GRID-FIXED-REPEAT-COMPUTED-SERIALIZATION
T-DEBT-GRID-FIXED-ROW-PERCENT-INTRINSIC-BOUNDARIES
T-DEBT-GRID-OWN-PERCENT-BOX-MODEL-KNOWN-ADJACENT-GEOMETRY
T-DEBT-GRID-PARTIAL-FR-AUTO-STRETCH-KNOWN-ADJACENT-GEOMETRY
T-DEBT-GRID-PRESERVED-TAB-INTRINSIC-ADVANCE-PARITY
T-DEBT-GRID-TEMPLATE-CSSOM-USED-TRACK-SIZES
T-DEBT-HIT-TEST-BROWSER-SUBPIXEL-CONTRACT
T-DEBT-ICU-DATA-MACOS-LINUX-VALIDATION
T-DEBT-IDLE-WAKE-NONWINDOWS-NEVER-REARMS
T-DEBT-IFC-BASELINE-SOLVER
T-DEBT-IFC-BOUNDARY-MIDWORD-RESIDUAL-SHAPES
T-DEBT-IFC-EXPORTED-BASELINE-BELOW-STRUT
T-DEBT-IMG-EMPTY-SOURCE-BROWSERCOMPAT-FALLBACK-BAND
T-DEBT-INLINE-ATOMIC-JUSTIFY-FIXTURE-RESOURCE-SETTLEMENT
T-DEBT-INLINE-BOX-DECORATION-BREAK-CLONE
box-decoration-break:clone 对跨行行内元素只在绘制侧生效，排版不给每个片段两端加 padding / 边框
验证范围
docs/known_issues.md:332
反馈此接口问题 →T-DEBT-INLINE-EFFECT-OWNER-OVERFLOW-RESET-INTERACTION
「只裹一个浮动的 opacity 行内」（effect owner）在 layoutBlockChildren 里写下的浮动范围，同一趟随后被 visitInlineCBs 的「非包含块行内清溢出」清回 0
验证范围
docs/known_issues.md:320
反馈此接口问题 →T-DEBT-INLINE-LIST-ANON-IFC-MARKER-INTEGRATION
T-DEBT-INLINE-LISTITEM-FRAGMENT-MARKER
普通 display:inline list-item 的角色、marker 与 block-in-inline split 几何
验证范围
docs/known_issues.md:213
反馈此接口问题 →T-DEBT-INLINE-ROOT-RUN-COLLECTOR-PARITY
InlineLayout 独立行内根的 run 收集器与整段路径不一致：<br> 被吞（嵌套相对定位一项已随 B24 合入消失）
验证范围
docs/known_issues.md:157
反馈此接口问题 →T-DEBT-INLINE-RTL-LIST-ITEM-GEOMETRY
T-DEBT-INSIDE-MARKER-TEXT-UNBREAKABLE
T-DEBT-INSIDE-TEXT-MARKER-DECORATION
T-DEBT-INTRINSIC-ARABIC-WORD-CEIL-PLUS-ONE
阿拉伯文连写词的 max-content 被 IntrinsicSizer 上取整再加 1px，盒比 Chrome 宽约 1～2px
验证范围
docs/known_issues.md:104
反馈此接口问题 →T-DEBT-INTRINSIC-SIZER-CROSS-NODE-SHAPING
T-DEBT-INTRINSIC-SIZER-KEYWORD-CONTRIBUTION-PARITY
IntrinsicSizer 覆盖不到旧关键字求值器处理过的多种形状，块级关键字宽度无法整体切过去；行向 flex item 的关键字宽度（A59）已经在用它
验证范围
docs/known_issues.md:106
反馈此接口问题 →T-DEBT-INTRINSIC-STANDALONE-PRESERVED-TEXT-EDGES-GRID-ONLY
T-DEBT-INTRINSIC-TRAILING-LETTER-SPACING
T-DEBT-LAYOUT-DEPTH-GUARD-THRESHOLD-STALE
T-DEBT-LEGACY-CLAMP-NEXT-LINE-IN-PADDING
Chrome 的旧式 -webkit-line-clamp 只截高度，下一行的上沿露在下 padding 里；KUI 不画被截掉的行
验证范围
docs/known_issues.md:341
反馈此接口问题 →T-DEBT-LETTER-SPACING-PINNED-KNOWN-DEVIATIONS
test_letter_spacing_per_line_start_offset 把三类与 Chrome 的已知差精确钉在 dev / 跳过项里
验证范围
docs/known_issues.md:160
反馈此接口问题 →T-DEBT-LINE-CLAMP-CROSSING-INLINE-DISCARDED-FRAGMENTS
跨过 line-clamp 截断点的行内元素（前半在保留行、后半被截掉），getClientRects() 缺被截掉那几行的片段
验证范围
docs/known_issues.md:206
反馈此接口问题 →T-DEBT-LINE-CLAMP-LEGACY-SCROLL-EXTENT-CSSOM-ONLY
旧语法 line-clamp 宿主只有 CSSOM scrollHeight 含被截掉的行，滚动范围 / scrollWidth / DevTools 滚动信息不含
验证范围
docs/known_issues.md:207
反馈此接口问题 →T-DEBT-LINE-CLAMP-MODERN-NATIVE-ELLIPSIS-SOFT-LINE-CUT
现代 line-clamp 走 SkParagraph 原生省略号的形状（>3 行、非起始对齐等，F-WPT-FIX-950 的软换行回退路径只覆盖 2～3 行起始对齐 LTR），最后一行仍有悬挂空白偏移 / 多留下一个词的头几个字
验证范围
docs/known_issues.md:204
反馈此接口问题 →T-DEBT-LINE-CLAMP-OVERFLOW-VISIBLE-DISCARDED-PAINT
T-DEBT-LINE-HEIGHT-NORMAL-CAP-TWICE-FONT-SIZE
line-height:normal 的 2×字号上限与 Chrome 不同（只影响内容带远高于字号的异常字体，如 Javanese Text）
验证范围
docs/known_issues.md:335
反馈此接口问题 →T-DEBT-LINUX-CANVAS-TEXT-MEASURE-ZERO
T-DEBT-LINUX-POPUP-DISMISS-ON-WINDOW-DEACTIVATE-UNVERIFIED
T-DEBT-LINUX-POPUP-NO-COMPOSITOR
T-DEBT-LINUX-TEXT-RASTER-PROFILE
T-DEBT-LINUX-TRAYICON-NOT-IMPLEMENTED
T-DEBT-LIST-MARKER-DEVICE-SPACE-RASTER
T-DEBT-LONG-TEST-EXE-NEAR-RUNNER-TIMEOUT
T-DEBT-MACOS-TEXT-RASTER-PROFILE
T-DEBT-MACOS-TRAY-BALLOON-DEPRECATED-API
T-DEBT-MRG-DEVTOOLS-OUTERHTML-CONTRACT
T-DEBT-MRG-DEVTOOLS-REMAINING-PARAM-SCHEMA
T-DEBT-MRG-FORM-DOCUMENT-INVALIDATION-COST
T-DEBT-MRG-FORM-PATTERN-COST
T-DEBT-MRG48-CROSS-ENGINE-BASELINE-METRICS
T-DEBT-MULTICOL-PROJECTED-DAMAGE-CULL
T-DEBT-MULTILINE-INLINE-OUTLINE-RADIUS
T-DEBT-NEGATIVE-LAYER-INLINE-ROOT-OWNED-EXTRAS
T-DEBT-NO-BACKEND-ANON-IFC-LINE-HEIGHT
T-DEBT-OVERFLOW-WRAP-DEFER-NON-SPACE-OPPORTUNITY
overflow-wrap 先换行再切词只认作者空格 / tab：本行最近的断行机会是 -、/、表意文字之间等位置时仍在当前行切，带浮动 / 表单控件的旧逐段排版路径也仍就地切
验证范围
docs/known_issues.md:338
反馈此接口问题 →T-DEBT-PARITY-3D-TRANSFORM
T-DEBT-PARITY-FIT-CONTENT-FUNCTION
T-DEBT-PARITY-FONT-METRICS-BASELINE-PHASE
T-DEBT-PARITY-GAP-PERCENT-INDEFINITE
T-DEBT-PARITY-GRID-MAXCONTENT-INLINE-SIBLINGS
grid width:max-content 对 cell 内的 inline 兄弟按 block 逐个取 max，而非整段 IFC 一次测量
验证范围
docs/known_issues.md:73
反馈此接口问题 →T-DEBT-PARITY-REMOTE-FONT-MODEL
只有同步的本地字体加载模型：无远程 @font-face src:url() 下载；unicode-range 解析但不应用；font-display 无可观察差异
验证范围
docs/known_issues.md:263
反馈此接口问题 →