Remove fixed positioning from footer banner

[Copilot]

The funding banner was permanently fixed to the viewport bottom via Bootstrap's fixed-bottom class. Changed to standard footer positioning so it only appears when scrolling to the end of content.

Changes

• Removed fixed-bottom class from footer element in app.component.html
• Removed 120px bottom margin from .content in app.component.scss (no longer needed to accommodate fixed footer)
• Added 20px margin-top to .page-footer for visual separation from content

Visual Impact

Before: Banner overlays content at all scroll positions

After: Banner appears only at bottom of page with proper whitespace

Top of page (footer not visible):

Scrolled to bottom (footer visible with 20px whitespace):

[!WARNING]

Original prompt

---

This section details on the original issue you should resolve

<filter_complete></filter_complete>

<issue_title>Don't show banner at the bottom of the screen permanently</issue_title>
<issue_description>Currently, there is a banner shown permanently at the bottom of the screen. I think it should instead only be shown when one is looking at the very bottom of the web page.</issue_description>

Comments on the Issue (you are @copilot in this section)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Don't show banner at the bottom of the screen permanently</issue_title>
<issue_description>Currently, there is a banner shown permanently at the bottom of the screen. I think it should instead only be shown when one is looking at the very bottom of the web page.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Don't show banner at the bottom of the screen permanently #19

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[michael-schwarz]

@copilot: Include a 20px whitespace above the footer

[Copilot]

@copilot: Include a 20px whitespace above the footer

Added 20px margin-top to the footer in commit 1fb8dfb.

[michael-schwarz]

I tested it locally, it looks good!