docs/android.md: what a turn does when nobody answers, and md_to_pdf

The SAF picker is not 'still to come' any more (v0.9.6 did it): the list keeps
the back gesture and the icon glyphs. In its place, what v0.9.7 changed on the
phone -- a consent question refused in the background and bounded in the
foreground, the bounded GUI hop, the phase in the header, and the window's own
md_to_pdf.

docs/android.md

@@ -197,6 +197,25 @@ have, so the script rewrites the shebang of the build-tools wrappers.
   start of the turn and released at its end, `run_shell sleep 60` finished with
   the screen dark, and the service was gone once the turn was over.
   `CST_APP_NO_SERVICE=1` keeps a test run from touching the phone.
-* Still to come: the SAF picker for attaching a picture from another app, the
-  back gesture, and the icon glyphs -- `ThemeIcon` finds no icon files on the
-  phone and draws empty boxes where the desktop shows Breeze icons.
+* **A turn that asked and got no answer**: a consent question cannot outlive
+  the app being off screen. `AgentCore::hookPermission()` / `hookAskUser()`
+  refuse (or drop the question) at once while the app is in the background --
+  Qt reports that as `Qt::ApplicationSuspended`, so the worker is never parked
+  on a dialog nobody can see, and the transcript carries a line saying why. In
+  the foreground the same two hooks wait two minutes (a permission) or five
+  (a question) and then answer "no" with a reason instead of waiting for good.
+  The GUI hop a platform tool makes (`onGuiThread()` in
+  `app/src/platform/android/AndroidTools.cpp`) pings first and gives up after
+  three seconds, and the header shows what the turn is doing
+  (`shell: make -j8`) so a long turn is not mistaken for a stuck one.
+  `--uitest` covers the window side of all this.
+* **Documents**: `md_to_pdf` (the window's own tool,
+  `app/src/core/PdfTools.cpp`, owner `app:qt`) lays markdown or a workspace
+  `.md`/`.html` out as an A4 PDF with 15 mm margins and hands it over as a file
+  card, exactly the way `deliver_file` does; `QPrinter`/PrintSupport is not
+  used, so the phone gets it too. Qt's PDF engine embeds a font *subset*, which
+  is why a Chinese page is a few KB rather than the few MB a whole CJK font
+  would cost (see `app/README.md`).
+* Still to come: the back gesture, and the icon glyphs -- `ThemeIcon` finds no
+  icon files on the phone and draws empty boxes where the desktop shows Breeze
+  icons.