Refactor logging setup across multiple modules to use loguru with consistent configuration

- Updated logging initialization in MessageCalendar, admin_edit_prof, elsa_main, graph, iconLine, searchPage, and richtext modules to use loguru.
- Changed log rotation and retention settings for log files to improve log management.
- Replaced logger.debug/info calls with log.debug/info for consistency.
- Fixed a typo in the searchPage UI and updated related references in the UI files.
- Removed unused imports and cleaned up code for better readability.

src/backend/semester.py

@@ -1,27 +1,25 @@
 import datetime
 
 from dataclasses import dataclass
+import loguru
 import sys
-from loguru import logger as log
 
-logger = log
-logger.remove()
-logger.add("logs/application.log", rotation="1 week", retention="1 month", enqueue=True)
+log = loguru.logger
+log.remove()
+log.add(sys.stdout)
+log.add("logs/application.log", rotation="1 MB", retention="10 days")
 
 
-# logger.add(sys.stderr, format="{time} {level} {message}", level="INFO")
-logger.add(sys.stdout)
-
 
 @dataclass
 class Semester:
-    logger.debug("Semester class loaded")
+    log.debug("Semester class loaded")
 
     _year: int | None = str(datetime.datetime.now().year)[2:]
     _semester: str | None = None
     _month: int | None = datetime.datetime.now().month
     value: str = None
-    logger.debug(
+    log.debug(
         f"Initialized Semester class with values: month: {_month}, semester: {_semester}, year {_year}"
     )
 
@@ -45,7 +43,7 @@ class Semester:
         else:
             self._semester = "SoSe"
 
-    @logger.catch
+    @log.catch
     def computeValue(self):
         # year is only last two digits
         year = self._year
@@ -57,7 +55,7 @@ class Semester:
                 valueyear = str(year) + "/" + str(year + 1)
         self.value = f"{self._semester} {valueyear}"
 
-    @logger.catch
+    @log.catch
     def offset(self, value: int) -> str:
         """Generate a new Semester object by offsetting the current semester by a given value