User report after the lifted-handle change: "I cannot go up or down,
just side to side" — a consequence of the line-band pin added with the
lift (the floating finger sits above the text; a band-constrained scan
ignored vertical movement entirely).
The endpoint drag is now full 2D: the finger position (plus the
~15px body-center-to-tip offset) maps to page fractions and the
nearest glyph re-anchors the grabbed end — up/down crosses lines,
side-to-side moves along them, clamped so the extent never inverts.
The boundary rect's own band constraint is gone; sliver rects remain
structurally impossible (rects rebuild from the char-table span as
per-line unions).
Direct-fraction probes verified: (0.4, 0.098) → mid line 1; (0.2,
0.117) → line 2 head; (0.72, 0.117) → line 2 mid — spans cluster into
the right per-line boxes. The dot-listener plumbing (pixels → map →
fractions → scan) verified by instrumented probe on the same load.
Final desktop finger pass pending (emulator input pipeline wedged).
John O'Keefe
5a0d9e0e17