Refactor and enhance type hints across multiple modules

- Updated the `from_tuple` method in `Prof` class to specify return type.
- Added type hints for various methods in `LehmannsClient`, `OpenAI`, `WebRequest`, and `ZoteroController` classes to improve code clarity and type safety.
- Modified `pdf_to_csv` function to return a string instead of a DataFrame.
- Enhanced error handling and type hints in `wordparser` and `xmlparser` modules.
- Removed unused UI file `Ui_medianadder.ts`.
- Improved the layout and structure of the `semesterapparat_ui` to enhance user experience.
- Updated file picker to support `.doc` files in addition to `.docx`.
- Added unique item handling in `Ui` class to prevent duplicates in apparat list.
- General code cleanup and consistency improvements across various files.

src/logic/lehmannsapi.py

@@ -134,10 +134,10 @@ class LehmannsClient:
                         enriched.append(r)
                     continue
 
-                soup = BeautifulSoup(html, "html.parser")
+                soup = BeautifulSoup(html, "html.parser")  # type: ignore
 
                 # Pages
-                pages_node = soup.select_one(
+                pages_node = soup.select_one(  # type: ignore
                     "span.book-meta.meta-seiten[itemprop='numberOfPages'], "
                     "span.book-meta.meta-seiten[itemprop='numberofpages'], "
                     ".meta-seiten [itemprop='numberOfPages'], "
@@ -151,7 +151,7 @@ class LehmannsClient:
                         r.pages = f"{m.group(0)} Seiten"
 
                 # Availability via li.availability-3
-                avail_li = soup.select_one("li.availability-3")
+                avail_li = soup.select_one("li.availability-3")  # type: ignore
                 if avail_li:
                     avail_text = " ".join(
                         avail_li.get_text(" ", strip=True).split()
@@ -200,12 +200,12 @@ class LehmannsClient:
             if not a:
                 continue
             url = urljoin(BASE, a["href"].strip())
-            base_title = (block.select_one(".title [itemprop='name']") or a).get_text(
+            base_title = (block.select_one(".title [itemprop='name']") or a).get_text(  # type: ignore
                 strip=True
             )
 
             # Alternative headline => extend title
-            alt_tag = block.select_one(".description[itemprop='alternativeHeadline']")
+            alt_tag = block.select_one(".description[itemprop='alternativeHeadline']")  # type: ignore
             alternative_headline = alt_tag.get_text(strip=True) if alt_tag else None
             title = (
                 f"{base_title} : {alternative_headline}"
@@ -216,7 +216,7 @@ class LehmannsClient:
 
             # Authors from .author
             authors: list[str] = []
-            author_div = block.select_one("div.author")
+            author_div = block.select_one("div.author")  # type: ignore
             if author_div:
                 t = author_div.get_text(" ", strip=True)
                 t = re.sub(r"^\s*von\s+", "", t, flags=re.I)
@@ -228,7 +228,7 @@ class LehmannsClient:
             # Media + format
             media_type = None
             book_format = None
-            type_text = block.select_one(".type")
+            type_text = block.select_one(".type")  # type: ignore
             if type_text:
                 t = type_text.get_text(" ", strip=True)
                 m = re.search(r"\b(Buch|eBook|Hörbuch)\b", t)
@@ -240,7 +240,7 @@ class LehmannsClient:
 
             # Year
             year = None
-            y = block.select_one("[itemprop='copyrightYear']")
+            y = block.select_one("[itemprop='copyrightYear']")  # type: ignore
             if y:
                 try:
                     year = int(y.get_text(strip=True))
@@ -249,7 +249,7 @@ class LehmannsClient:
 
             # Edition
             edition = None
-            ed = block.select_one("[itemprop='bookEdition']")
+            ed = block.select_one("[itemprop='bookEdition']")  # type: ignore
             if ed:
                 m = re.search(r"\d+", ed.get_text(strip=True))
                 if m:
@@ -257,15 +257,15 @@ class LehmannsClient:
 
             # Publisher
             publisher = None
-            pub = block.select_one(
+            pub = block.select_one(  # type: ignore
                 ".publisherprop [itemprop='name']"
-            ) or block.select_one(".publisher [itemprop='name']")
+            ) or block.select_one(".publisher [itemprop='name']")  # type: ignore
             if pub:
                 publisher = pub.get_text(strip=True)
 
             # ISBN-13
             isbn13 = None
-            isbn_tag = block.select_one(".isbn [itemprop='isbn'], [itemprop='isbn']")
+            isbn_tag = block.select_one(".isbn [itemprop='isbn'], [itemprop='isbn']")  # type: ignore
             if isbn_tag:
                 digits = re.sub(r"[^0-9Xx]", "", isbn_tag.get_text(strip=True))
                 m = re.search(r"(97[89]\d{10})", digits)
@@ -288,7 +288,7 @@ class LehmannsClient:
 
             # Image (best-effort)
             image = None
-            left_img = block.find_previous("img")
+            left_img = block.find_previous("img")  # type: ignore
             if left_img and left_img.get("src"):
                 image = urljoin(BASE, left_img["src"])