update type handling

[FriendlyUser1]

This adds type checking, and improved types for multiple functions.

Class EntryDetails has been created since the upstream pykeepass package has poor typing, though may be fixed in future

I have also added a label to the entry modal notes text area (which is encouraged by streamlit) and set its visibility to collapsed which removes the gap above the note box.

Summary by Sourcery

Improve type safety and robustness across KeePass utilities and entry UI, while refining the entry comparison output typing.

Enhancements:

• Introduce a strongly-typed EntryDetails structure and update database utilities and UI components to use it.
• Guard KeePass entry and group iteration against empty collections to make database operations more robust.
• Adjust the entry modal notes field to use a hidden label and consistent key handling for better Streamlit integration.
• Tighten the compare_databases return type to a dictionary of string keys to sorted string lists.

[sourcery-ai]

Reviewer's Guide

Adds stronger typing across database utilities and the entry modal, including a dedicated EntryDetails TypedDict, and makes small behavioral tweaks to entry/group iteration and the notes text area label.

File-Level Changes

Change	Details	Files
Introduce a strongly-typed structure for entry details and add type hints to database utilities.	Import datetime and TypedDict and define EntryDetails with explicit, nullable fields including timestamps and path. Change get_entry_details return type from untyped Dict to EntryDetails	None and update its construction to match the TypedDict. Adjust get_entries_set and get_entry_details to guard iteration over kp.entries and kp.groups with truthiness checks to satisfy type checking.
Add basic runtime validation around group traversal in merge_entry.	Guard the source_kp.entries iteration with a truthiness check. Insert a defensive check that current_group is a Group before iterating subgroups, returning False if the type check fails.	KeePassDiff/utils/database.py
Tighten typing and behavior of the entry details modal component.	Import EntryDetails and make show_entry_details accept an EntryDetails	None and default key to an empty string. Update the notes text_area to use a named label with label_visibility="collapsed" and always provide a key based on the key parameter.
Strengthen typing of comparison results between databases.	Import List typing helper and change compare_databases return type from Dict to Dict[str, List[str]] while preserving existing keys and values.	KeePassDiff/utils/comparison.py

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[sourcery-ai]

Hey - I've found 3 issues, and left some high level feedback:

• In merge_entry, the if current_group != Group: check will always be true because Group is a type, not an instance; if you intend to validate the type, use isinstance(current_group, Group) (or drop the check if root_group is already guaranteed to be a Group).
• The change to show_entry_details to default key to "" and always use key=f"notes_{key}" means calls that omit key will all share the same Streamlit widget key ("notes_"), which can cause state collisions; consider keeping key as Optional[str] and passing None through when not provided.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- In `merge_entry`, the `if current_group != Group:` check will always be true because `Group` is a type, not an instance; if you intend to validate the type, use `isinstance(current_group, Group)` (or drop the check if `root_group` is already guaranteed to be a `Group`).
- The change to `show_entry_details` to default `key` to `""` and always use `key=f"notes_{key}"` means calls that omit `key` will all share the same Streamlit widget key (`"notes_"`), which can cause state collisions; consider keeping `key` as `Optional[str]` and passing `None` through when not provided.

## Individual Comments

### Comment 1
<location path="KeePassDiff/utils/database.py" line_range="117" />
<code_context>
     current_group = target_kp.root_group
+
     for group_name in group_path:
+        if current_group != Group:
+            return False
+
</code_context>
<issue_to_address>
**issue (bug_risk):** The `current_group != Group` check will always be true and prevents `merge_entry` from progressing.

Here `current_group` is an instance and `Group` is the class, so this comparison is always `True`. As a result, the loop returns `False` on its first iteration whenever `group_path` is non-empty, breaking merges for nested entries. If the goal is a type check, use `isinstance(current_group, Group)` and only return `False` when that fails, or remove this condition if `current_group` is already guaranteed to be a `Group`.
</issue_to_address>

### Comment 2
<location path="KeePassDiff/utils/database.py" line_range="120" />
<code_context>
+        if current_group != Group:
+            return False
+
         next_group = next((g for g in current_group.subgroups if g == group_name), None)
         if not next_group:
             next_group = target_kp.add_group(current_group, group_name)
</code_context>
<issue_to_address>
**issue (bug_risk):** Comparing `Group` instances directly to `group_name` may never match and could cause redundant group creation.

Here `g` is a `Group` instance while `group_name` is a string, so this comparison will always fail unless `Group.__eq__` is specially implemented. That means you’ll always create a new subgroup instead of reusing existing ones. Compare the group’s identifier (e.g. `g.name` or `str(g)`) to `group_name` instead.
</issue_to_address>

### Comment 3
<location path="KeePassDiff/components/entry_modal.py" line_range="7-8" />
<code_context>

-def show_entry_details(entry_details: Optional[Dict] = None, key: str = None):
+def show_entry_details(
+    entry_details: EntryDetails | None = None,
+    key: str = "",
+):
     if entry_details:
</code_context>
<issue_to_address>
**issue (bug_risk):** Changing `key` to default to an empty string may introduce unintended Streamlit key collisions.

With this change, any call that omits `key` will use the same underlying widget key (`"notes_"`), so multiple `show_entry_details` instances without explicit keys will share state in Streamlit. Consider keeping `key: str | None = None` and only prefixing when `key is not None`, or generating a unique key internally for each call.
</issue_to_address>

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[FriendlyUser1]

closing to bundle these changes with larger diff updates