Three attempts at this and the cause was never the offset arithmetic. Measured on build 86, the label mean angles were 45.9 / 130.3 / 209.1 / 319.9 degrees while the wedge centres are 0 / 90 / 180 / 270. A constant ~45 degree error in all four quadrants is not a magnitude problem, it is an origin problem. The wedges are drawn at angles[i], which distributeAngles() fills starting from 0 and stepping clockwise, so item 0 sits at drawAngle 0 -- to the RIGHT, because canvas angles run from 3 o'clock. The label loop was computing `i * (360.0/n) - 90.0`, which assumes the first wedge is at the top. So the labels were anchored a quarter turn away from the wedges, which is exactly one separator, and no value of the constant would have fixed it. The labels now take the wedge angles as a parameter and use angles[i] directly, so a label and its wedge cannot disagree again -- including for a menu whose item count is not 4 or which pins an item with an explicit `angle`. Also worth recording: the two earlier attempts were tuning a constant while the constant itself was wrong, and the measurements (19 px in the top quadrant, then "all four on the boundaries") were consistent with an origin bug the whole time.
Third attempt at the label placement, and the previous one did not work. Measured about the true disc centre (135.0, 725.5, a 200x200 disc) the label means sat at 152 / 201 / 300 degrees: still 15-24 degrees from a separator and 21-62 degrees from a wedge centre. Why 90 dp did not fix it: Modifier.offset is applied AFTER placement, so it adds to wherever the parent's placement rules already decided. With Box(Modifier.fillMaxSize(), contentAlignment = Center) the parent was deciding, and a polar offset added on top of that is not a polar position -- the parent's rules win and the angle comes out wrong. This time the parent stops deciding. BoxWithConstraints gives the real constraint size, and each label box is positioned at (centre + cos/sin * 67dp - halfBox) with nothing else touching placement. Box is 84 dp so it fits inside a 45 degree wedge at r=67 (arc length there is about 53 dp), and the box's centre, not its corner, is placed on the bisector. Verified by measurement on the next build rather than assumed: the label mean angle per quadrant must come out near 0/90/180/270 rather than 45/135/225/315.
The previous commit fixed the missing top label but left the placement wrong in a subtler way, and the measurement caught it: taking the circular mean of the white ink in each quadrant gave 60 / 128 / 207 / 325 degrees. The wedge bisectors are 0 / 90 / 180 / 270 and the separators are 45 / 135 / 225 / 315, so every label sat 27-60 degrees off its wedge centre and within 7-18 degrees of a separator. Cause: each label lived in a Box sized labelRadius * 2 = 134 dp. That is two thirds of the whole 200 dp disc, so it does not fit inside a 45 degree wedge. Compose redistributed the overflow by placing the child about 45 degrees away from where the offset asked, which is exactly the boundary-hugging result. Fix: size the measuring box at 90 dp so it fits the wedge arc, and compute the top-left so the box's CENTRE lands on the bisector at 67 dp rather than letting the box corner land there. Radial distance is unchanged. Hub stays at 22% and the separators stay 3 px; the review only complained the overall structure still read weakly because of this placement.
Pro reviewed the rebuilt menu and read the image rather than the numbers: three quadrants had labels, the top one had none. My own pixel count agreed -- 19 px of white ink in the top quadrant against 421-519 px in the others. Cause: the label loop computed a polar offset relative to the CENTRE but applied it with Modifier.offset inside Box(Modifier.fillMaxSize()), whose origin is the TOP-LEFT. So every label was displaced by half a radius too little, and the top one at y = -67 dp landed outside the disc entirely. The three that appeared to work were only roughly right. Fix: centre the outer Box (contentAlignment = Center) so the origin is the disc centre, and pass the polar displacement as a relative offset. Pro's -90 deg convention was already right -- item 0 at the top, proceeding clockwise -- and is kept; only the origin was wrong. Pro's other read on the rebuild: the 3 px separator reads well at this size and does not flare, and the 22% hub is better balanced than 26%. Both kept.
The menu still looked wrong after the donut revision, so the geometry was re-measured rather than re-guessed. The numbers matched the previous reviewer's spec exactly, which is what made the spec itself the suspect. Measured on the published build: disc 200x200 at (139.5, 725.5), hub 54x54 dead centred on it, wedge/gap boundaries exactly on 45/135/225/315 degrees. So the distances were right. But sampling the white label ink at r=40..90 and taking the circular mean of each cluster gave 35 / 133 / 148 / 212 / 330 degrees. The wedge bisectors are 0/90/180/270. The labels were sitting on the SEPARATOR axes, not the wedge centres. Cause: the labels were placed with a 3x3 Row/Column grid. That grid happens to put cell centres on the diagonals, so a polar control was being laid out with Cartesian logic and the 61 dp radius -- correct as the midpoint of the 26..96 band -- landed the glyphs on the boundaries. Labels are now placed in polar coordinates: angle from the wedge bisector (top, then clockwise), radius 67 dp, centred on their own measured glyph box rather than a grid slot. Horizontal text is kept; rotating the left/right labels would read as an instrument dial rather than school navigation, so the radial relationship comes from position only. Also, per the same review, the separators stop being angular gaps. A 2 degree gap is 0.94 px wide at the hub and the wedge/gap contrast was 1.34:1, so it read as four notches in one disc. They are now a constant 3 px stroke in #24272D, which does not flare with radius, and pieWedge moves #5C6068 -> #626873 to reach about 3:1 against it. The hub drops from 26% to 22% of the radius so the centre is less dominant. Labels go to 15sp semibold, which also helps the longest (3 chars) sit level with the 2-char ones.
Reviewed with GPT 5.5 Think Deeper over the M365 relay. It confirmed the donut was the right call and rejected one part of it. Keep the donut. The hub is 6.76% of the disc area (radius 26dp of 100dp) against ~23.3% per wedge, so it is usable without crowding the items, and removing the cross from behind the "W" fixes a real defect. It also supplies the missing semantic rule: the centre is a meta-action, not a fifth command, and must not be styled like a wedge -- recorded at the glyph, since the tree is currently one level deep and "W" is correct only at the root. Dividers: replace the radial strokes with a 2dp negative-space gap in the disc colour. Contrasting strokes read as construction lines and emphasise the pie's geometry rather than four selectable objects. The gap is paint only -- hit testing keeps the exact 90-degree boundaries, so a pointer in a gap still belongs deterministically to one adjacent sector. The near-coincident ring was the actual mistake: a selection ring at r-1.5/3px sat 3px outside the frame ring at r-1.2/2.4px and read as two parallel lines. Selection is now the corresponding arc of the single existing frame, drawn at 5px in the accent colour. Label band unchanged at 39dp: the hub turns out to validate it rather than invalidate it -- 61dp is exactly the midpoint of the now-visible 26..96dp annulus, so moving labels either way would make the hub look wrong. Pro also confirmed the arithmetic behind the 200dp diameter is sound (Blender and Kando both use 100px radius; Gnome-Pie's formula gives 46px only as the geometric minimum).
Three separate defects, all found by measuring captures rather than reading the code. 1. Note row title stayed black. NoteButton's title Text omitted color=, so it inherited LocalContentColor and got Compose Material's default black -- identical to the KUKURI/card bugs, but my earlier sweep MISSED it. That sweep's parenthesis matching over-ran past a single-line call into the next statement, absorbed that statement's color=, and reported zero. The detector now tracks depth per character across the file; it reports 0 genuinely uncoloured Text() calls across all 13 files, so this class is closed by construction rather than by spot fixes. 2. Light mode left white-on-ground text. Five sites had a hard-coded Color.White with nothing filled behind them, so they vanished on the light ground: the Home "今日" heading, the CountChip number, the pie hub ring, the pie child dots, and the pie "W". Each now takes the theme's paired colour (onSurface / pieInk / pieLine). The other Color.White uses are left alone deliberately -- they sit on a filled accent (wine primary, personal-kind chip, FAB, active nav item, filled filter/action buttons), where white is correct in both themes. Verified each by reading its background rather than by blanket replace. 3. Pie menu reshape, asked for as "もっといい形に". The wedges ran to the centre and the divider lines crossed the hub, so the "W" had a line through it and the four items read as one pie. It is now a donut: a hub disc drawn over the wedges, dividers starting at the hub radius instead of the centre, and a ring on the touched wedge's outer edge so the current selection is shown by position as well as colour.
Follow-up to the KUKURI title fix -- same defect, same cause, six more sites. The card content on Home / Note / Timeline rendered black on the dark ground: HomeSection label (TODO section heading) Today's section label (今日 section heading) NoteRow body (note text, the unread/bold variant) timeline row body (the line text) timeline row `from` (the author column) second timeline body (the line with an attachment/badge) All omitted color, so they inherited LocalContentColor; no Surface in those columns sets it, so they took Compose Material's default black. Adjacent elements in the same rows -- the note caption, the badge, the right-aligned due labels -- already passed an explicit color, which is why only part of each row looked wrong. Every Text in modules/orgflow-ui now names a color: a sweep of the whole module for Text(...) calls with no color= argument returns zero, so this class of bug is closed rather than patched at six sites. onSurface rather than White, so light mode stays correct.
Dark mode left the titles black. Measured from the deployed capture: the "KUKURI" title rendered as #1b1c1f, luminance 11%, i.e. DARKER than the #313338 ground it sat on. Cause: all three call sites omitted color, so they inherited LocalContentColor -- and no Surface in those columns sets it, so they got Compose Material's default, black. - NavRail "KUKURI" heading - NarrowScaffold "KUKURI" heading (phone layout) - FramePlaceholder frame title onSurface is the paired colour for the background/surface faces actually in use, so it is correct in both themes rather than hard-coding white -- which would have re-broken light mode. Home / Timeline / Note measured #fcfcfc / #fafafa and were already white; their apparent dimness is contrast against the invisible title, not a separate defect. The phone tab bar already passed an explicit colour.
The 120dp disc was 60% of what shipping radial menus actually use, which left 4-character labels touching the outer ring and the divider lines. Match the measured values instead of the geometric minimum: Blender pie_menu_radius = 100px -> 200px diameter Kando --child-distance: 100px -> 200px diameter Fly-Pie child-offset = 106px -> 212px diameter Gnome-Pie radius = 100..150 -> 200..300px diameter Gnome-Pie's sliceRenderer gives the geometric lower bound for 4 wedges as (slice_radius + slice_gap) / tan(pi/N) = 46px, so 100px is not a geometric requirement -- it is where the products settled for legibility and room to move. Left column goes 232dp -> 280dp to hold a 247px painted disc plus 14dp padding on each side. Label band moves 21dp -> 39dp so the text sits mid-band between the 26dp centre hub and the outer ring, touching neither the hub, the dividers, nor the frame. Restores the working-tree edit that the buildbot's `method='clean'` checkout discarded when it ran inside this directory; a copy is kept at /ROM/tmp_probe/pie-recovered.patch.