[i-shutov]

B egui — B25 + B26, one draft PR

Base main: bb96abccea86835977e2608887f7470ba83a1167 (B16–B24 already integrated as #62).
Current exact B HEAD: 73878df418dd6343bbca9dd94a2e5daf979ed7fc. Branch feat/b25-egui-pointer-focus-fit-page-20261101; behind main: 0 at last compare.

User-facing vertical

• B25 pointer safety: genuine egui PointerGone / WindowFocused(false) cancel an armed click/drag, including same-frame release; next intentional native C-catalogue gesture works; no unintended TeX insertion.
• B25 full XeLaTeX PDF page: «Вся страница» measures the remaining viewer viewport after the 170pt provisional guide, warnings and toolbar. If 20% cannot fit, report it; do not pretend that guide pixels match PDF coordinates.
• B26 responsive whole-page mode: reproduced one-shot zoom deficiency: after a resize or navigation to a differently sized PDF page, prior fixed zoom can clip it again. «Вся страница» is now a selected persistent mode, recalculates on each frame and new page raster. Manual −/+/100%/Fit width exits auto-fit; opening a different project clears it. No source mutation.

Tests and evidence

• B25: 96 UNIT_EVENT timelines = six shared C primitives × two window widths × click/drag × two focus/pointer-loss events × two event orders; subsequent insertion and Undo preserve opaque macros byte-exactly.
• B25: actual egui layout frames 1366×740 / 850×560; fail-closed fit math.
• B26: b26_fit_page_button_remains_selected_on_resize_and_new_pdf_raster clicks the production egui button via Context::run(RawInput), changes viewport and page raster, tests manual-mode exit, below-20% refusal and unchanged TeX.
• Existing B16–B24 six gestures, palette, parameters, selection/code highlight/F1, manual-edit Undo, Save/Reopen retained.

Exact-head evidence on 73878df418dd6343bbca9dd94a2e5daf979ed7fc:

• Rust CI — IN_PROGRESS (Windows and macOS native jobs SUCCESS; Linux TeX fixture installation still active).
• D QA Rust/Clippy/XeLaTeX — SUCCESS, 7/7 jobs; Ubuntu app 67/67 tests PASS including B25 96 event timelines and new B26 production egui button/resize/new-page-raster test.
• N1 real XeLaTeX — SUCCESS.
• Distinct MiKTeX hosted Windows Server + independent audit — SUCCESS, both jobs including second-host PDF evidence audit.
• Fonts/Unicode embedding — SUCCESS.
• I21 old B24-pinned X11 — FAILED its old source-tree preflight; never executed B26 GUI and is not evidence of a B26 runtime regression. Independent B26 desktop QA still outstanding.

Owner boundaries: B-only crates/tikzarium-app/src/main.rs, tikz_canvas.rs, own plans/ + insights/. Shared C code/generator untouched; A core, D #40, E help, F source tests untouched. Old #37/#43 and merged #44 never duplicated. XeLaTeX supplies exact PDF, installed independently (Windows 10 MiKTeX prerequisite). Arbitrary macro/scope content is never rewritten.

Independent desktop gate: prior I19 real Linux/X11 B23 screenshots are NOT a B25/B26 acceptance. I21 job is pinned to B24's earlier app-tree hash, so its preflight rejection on this new head is NOT a B25/B26 GUI execution. Recalibrated B26 X11 screenshots + genuine Save/Build/Export + Cyrillic help must be performed by D/integrator. Physical Windows10 x64 user MiKTeX and Mac M1/M4 XeLaTeX, IME/Retina/native dialogs NOT_RUN. Leave draft pending independent gate.

[i-shutov]

Integrator I24 checkpoint — QA accepted into B26 at dc30363e53afe827e0a817ad556dab5e6eef5bd6 (2026-11-01).

Merged #68 only into this B feature branch, using expected_head_sha=245a753dc78a13db746e64b8580beaaa669eddae; original B26 source 73878df418dd6343bbca9dd94a2e5daf979ed7fc is unchanged by the seven QA-only files. Prior exact-B26 source CI was Rust SUCCESS, D QA 7/7 SUCCESS, N1 SUCCESS, fonts SUCCESS, distinct hosted MiKTeX + independent audit SUCCESS (old B24-pinned X11 preflight failure was not B26 GUI execution). Independently downloaded B26 hosted MiKTeX artifact 13064914455, ZIP SHA 5aa7851447dd6be4fd207d55d70bae634850b08eab736b481033e65d8404303f: 6/6 real 1-page PDFs with embedded DejaVuSerif/LatinModernMath/Cyrillic and Unicode, 9130/9130 MiKTeX package rows byte-identical, two strict negatives, source HEAD 73878df4. Hosted Windows Server 2022 MiKTeX, NOT physical Win10.

The independent real B26 Linux/X11 QA run 41262963488 SUCCESS, artifact 13066120894 SHA 4f2eb35fc9a05ec82184bc2d5b6a945c0a6e82abbfc1fd9abf65328c90bb9724, 31/31 SHA manifest, genuine six TikZ pointer tools / Save / XeLaTeX PDF / Russian F1 / entire PDF page beside source. Persistent «Вся страница» remains selected across genuine 1366×740 → 1180×680 → 1366×740 window resize, and the restored full-page screenshot is byte-identical to pre-resize. Important documented ergonomic limit: at 1180×680 the viewer has too little space at 20%, lower part of PDF is clipped with explicit warning (not full-page PASS). Consider collapsible guide pad in a later substantive GUI block, not a cosmetic micro-fix.

New B-head CI dc30363e... is running. Do NOT merge #67 to main until all exact-B-HEAD relevant workflows finish and critical artifacts are rechecked, then separate main push CI. Real GUI page switching/new-raster and physical Win10/Mac remain NOT_RUN. No release.