feat(LamNI,flomni): add PSI logo to every PDF report page footer

Downloaded from https://intranet.psi.ch/themes/custom/design/logo.svg
(no gradients/filters/embedded fonts -- confirmed fpdf2 renders it
directly, no PNG conversion needed) and stored as psi_logo.svg in
OMNY_shared. Added TomoQueueMixin._add_psi_footer(), which overrides
the fpdf instance's footer() callback (PDFWriter/BECPDF live in
bec_lib, a separate repo with no public API for this) so the logo
repeats on every page -- unlike the header logo, which is drawn once
inline, a report can span multiple pages (e.g. a long
at_each_angle_hook source dump). Also drops the microseconds from the
existing "BEC, <timestamp>" footer text while reimplementing it, per
request ("ms precision is not needed"). Verified end-to-end with
bec_lib's real PDFWriter: a 300-line hook source forced a 7-page
report, with the logo correctly repeating on every page.

csaxs_bec/bec_ipython_client/plugins/LamNI/lamni.py

@@ -2231,6 +2231,7 @@ class LamNI(TomoQueueMixin, LamNIAlignmentMixin, LamNIOpticsMixin, LamniGuiTools
         hook_source = self._active_hook_source()
         user_target = os.path.expanduser(f"~/data/raw/documentation/tomo_scan_ID_{self.tomo_id}.pdf")
         with PDFWriter(user_target) as file:
+            self._add_psi_footer(file)
             # PDFWriter (bec_lib) has no public image API -- reach into its
             # underlying fpdf object directly. logo_w chosen to keep the
             # header modest relative to the A4 page width (210mm).

csaxs_bec/bec_ipython_client/plugins/OMNY_shared/tomo_queue_mixin.py

@@ -39,6 +39,7 @@ import builtins
 import datetime
 import inspect
 import json
+import os
 import threading
 import uuid
 from typing import Callable
@@ -481,6 +482,39 @@ class TomoQueueMixin:
 
         threading.Thread(target=_run, name="PdfUpload", daemon=True).start()
 
+    def _add_psi_footer(self, pdf_writer) -> None:
+        """Add the PSI logo to every page's footer of a PDFWriter report.
+
+        PDFWriter/BECPDF (bec_lib, a separate repo) has no public API for
+        this, and its footer() is fpdf's own automatic per-page callback
+        (unlike the header logo, which is drawn once inline right after
+        opening the PDFWriter) -- a report can span multiple pages (e.g. a
+        long at_each_angle_hook source dump), so the logo needs to repeat
+        on each one. Fully replaces bec_lib's own footer() (rather than
+        calling it and adding to it) so the timestamp can drop the
+        microseconds str(datetime.datetime.now()) includes -- same visual
+        layout/font otherwise (see bec_lib/pdf_writer.py's BECPDF.footer()).
+        """
+        psi_logo = os.path.join(os.path.dirname(os.path.abspath(__file__)), "psi_logo.svg")
+        if not os.path.exists(psi_logo):
+            return
+        from fpdf import XPos, YPos
+
+        pdf = pdf_writer._pdf
+
+        def _footer_with_logo():
+            pdf.set_y(-15)
+            pdf.image(psi_logo, x=pdf.l_margin, y=pdf.h - 22, h=6)
+            pdf.set_font("Courier", "", 8)
+            pdf.set_text_color(128)
+            timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+            pdf.cell(0, 10, f"BEC, {timestamp}", 0, new_x=XPos.RIGHT, new_y=YPos.TOP, align="L")
+            pdf.cell(
+                0, 10, "Page " + str(pdf.page_no()), 0, new_x=XPos.RIGHT, new_y=YPos.TOP, align="R"
+            )
+
+        pdf.footer = _footer_with_logo
+
     # ── command-job action registry / dispatch ──────────────────────────────
 
     def _validate_action_kwargs(self, action_name: str, kwargs: dict) -> None:

csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py

@@ -3862,6 +3862,7 @@ class Flomni(
             f"~/data/raw/documentation/tomo_scan_ID_{self.tomo_id}.pdf"
         )
         with PDFWriter(user_target) as file:
+            self._add_psi_footer(file)
             # PDFWriter (bec_lib) has no public image API -- reach into its
             # underlying fpdf object directly. logo_w chosen to keep the
             # header modest relative to the A4 page width (210mm).