Draw fingering charts foot-up, in grouped rows.

The foot and the double holes sit at the top of each narrow chart, and the mouthpiece sits at the bottom, matching hand-drawn tabs. Which holes are open or closed is unchanged. A repeat mark is shown only when the score repeats. Version 0.1.2.

Co-authored-by: catpersonisme <catpersonisme@gmail.com>

README.md

@@ -7,14 +7,14 @@ The usual way to run it is one Linux AppImage. That file contains the window, th
 ## Run the AppImage
 
 ```bash
-chmod +x Recorder-Tab-Converter-0.1.1.AppImage
-./Recorder-Tab-Converter-0.1.1.AppImage
+chmod +x Recorder-Tab-Converter-0.1.2.AppImage
+./Recorder-Tab-Converter-0.1.2.AppImage
 ```
 
 If the file will not start because FUSE is missing:
 
 ```bash
-APPIMAGE_EXTRACT_AND_RUN=1 ./Recorder-Tab-Converter-0.1.1.AppImage
+APPIMAGE_EXTRACT_AND_RUN=1 ./Recorder-Tab-Converter-0.1.2.AppImage
 ```
 
 Open **Twinkle, Twinkle, Little Star** or **Ode to Joy** to see tabs immediately. Or drop a PNG, JPG, or WEBP of a page. The note list under the tab is editable. Fix a bad pitch or duration and the fingerings update. If a photo cannot be read, the app says so and does not invent notes.
@@ -30,7 +30,7 @@ From a checkout, one command:
 That installs Node packages, downloads a relocatable Python plus oemer and its ONNX models, builds the app, and writes:
 
 ```text
-dist/Recorder-Tab-Converter-0.1.1.AppImage
+dist/Recorder-Tab-Converter-0.1.2.AppImage
 ```
 
 The U-Net checkpoint from oemer 0.1.8 has ConvTranspose pads `[0, 0, -1, -1]`. The build rewrites those nodes to pads `[0, 0, 0, 0]` and `output_padding` `[1, 1]` before packaging. That is the same output size, and it is what current ONNX Runtime will load. The rewrite does not change fingerings.
@@ -51,6 +51,8 @@ The dev server listens on [http://127.0.0.1:3847](http://127.0.0.1:3847). Photo
 
 Baroque (English) fingerings are the first choice on the [Dolmetsch Online chart for recorders in C](https://dolmetsch.com/textfingeringchart.htm) (Brian Blood). The soprano is treated in concert pitch: it sounds as written, low C is C5, and the chart stops at D7. Double holes 6 and 7, forked F, and the second-octave thumb pinch are included. Alternate fingerings on that chart are not shown. Notes outside C5–D7 are flagged instead of guessed.
 
+Each chart is a narrow recorder drawn foot-up: holes 7 and 6 at the top, then 5 through 1, then the thumb, with the mouthpiece at the bottom. A filled hole is closed. The lead is a horizontal row of those charts, grouped by bar. An arrow after a chart is one more beat. A ×2 mark appears only when the music has a repeat.
+
 German mode changes three notes:
 
 - **F** — Dolmetsch’s German fingering, thumb plus holes 1–4 (`0 123 4`).