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xullul
c7e8d127af
Add: - Prepare supported Form placements as original page operators through the existing-text UI and text_prepare, with shared-form isolation and undo/redo. - Repair narrowly identified Thai exporter maps on copied page fonts, recording repairs without changing the embedded source glyph programs. Change: - Reuse legacy Thai Regular/Bold glyph codes and same-face punctuation subsets; retain point size, spacing, horizontal scale, rise, colour and paint settings. - Keep cross-family Thai replacement explicit and write matching bundled Thai subsets through the existing bounded outline path rather than static embedding. - Keep replacement-only menu choices out of the source-font preview atlas so opening an ordinary paragraph does not wait an extra frame for unused fonts. - Refuse unsafe compositing, tagged or malformed groups, and missing contextual glyphs without losing the user's document or changing other placements. Chores: - Document the editing limits and headless workflow; keep text-edit parity partial. Builds on dekkeng's Thai fallback work in #2811 (fba0a29a) and mtlcl410's Form Ungroup implementation in #3067 (6eafca9c), adapted to the current module layout. The Ungroup menu and older UI font-priority changes are not included. Refs #3185, #2964 and #2142. Synthetic regressions cover source-font preservation, shared forms, unsafe refusals, layout, undo/redo, rendering and save/reopen. Validation: library suites 1,675 passed; automation integration 331 passed; document-font integration 2 passed; editor flows 248 passed. Existing ignored tests remain. Formatting, scoped strict Clippy, layers, assets, parity and wasm checks passed. The unchanged opacity regression failed before the choice-only atlas correction and passed afterwards.