Convert raw code string to CodeLine array with unique IDs

* Collect TTS provider IDs the operator force-disabled, from YAML * (`tts.<id>.enabled: false`) and env (`TTS_<PREFIX>_ENABLED=false`). An * explici

Concatenate all `m:t` text inside an OMML node (plain-text fallback).

Collect every OMML string from a slide's top-level nodes (standalone math * elements + inline math runs inside text shapes). Group children are raw

* Collect every top-level OMML node (one per paragraph's formula). Stops * descending once it hits an oMathPara/oMath so a paragraph's container is

* Compute the center of an SVG arc given endpoints and radii. * Simplified: works well for circular arcs and reasonable ellipses.

SCENARIO ONLY. Roll up role-play skill metrics: act counts + turns/time from * the engagement caches, the cast + caption, and the per-act goal cover

User clicks "Join" on ProactiveCard → save cursor → live

idle → playing (continue from current position, e.g. after discussion end)

* Convert legacy interactiveConfig to unified widget fields * For backward compatibility with old classrooms

* Convert LaTeX delimiters while protecting <script> tags. * * - Protects script blocks from modification * - Converts $$...$$ to \[...\] (display

Count concept_unlocked events vs. closing_check + stage_synthesis_check * events so we can compute the independence rate.

Judge model. Defaults to the generation model unless EVAL_PBL_JUDGE_MODEL * is set (recommended: a strong, independent model so a weak generator doe

A FIFO counting semaphore: at most `size` `run()` callbacks execute at once.

* Get the current scene * * @returns Current scene

* Map OOXML dash kind to types.Border.borderType.

* Delete a whiteboard element * * @param elementId - Element ID * @param whiteboardId - Whiteboard ID * @returns Whether successfu

* 解析 SVG path 中的所有 (x,y) 坐标，判定该 path 是水平直线、垂直直线还是其它。 * 仅用于识别 line / straightConnector1 这类单段线段。

* Detect WPS (Kingsoft Office / WPS Office) by checking for known markers * in the presentation XML string.

* Build a diamond arrowhead at `tip`.

* Neutral, TIER-AGNOSTIC acknowledgment committed when the learner asked to * change difficulty (the model called `adjust_difficulty`) but wrote no t

Produce a structural digest from the older half of the thread.