[T3456] Add spacing between donation history list and its pager

[danpa32]

T3456 — Fix failing quality test: MyCompassion: donations

Follow-up to T3416-tax-receipt-donation-history/T3441-tax-receipt-signature-lang. compassion-switzerland, compassion-website, compassion-modules

Related PR

• T3456 fix donation quality test compassion-switzerland#1819
• [T3456] Follow the render's language, not the partner's stored one compassion-modules#2153

What changed

1. Tax receipt renders in the viewer's interface language, not the partner's stored one (compassion-switzerland)
2. Tax receipt overflowing to a second page (compassion-switzerland)

• The signature <img> had no height/width cap (width: 40%, ~76mm) — capped to width: 45mm (matching anniversary_card.xml's own signature usage). Margin-left adjusted afterward too (was -15mm, pushing it into the page margin per user feedback - see below).
• .body_text (the letter-body box) is hardcoded to min-height: 120mm whenever a signature is shown, forcing a large empty gap below "Best regards" even for the tax receipt's few short paragraphs. Added a compact_body flag (set only in tax_receipt.xml) that skips this min-height, without touching the other, longer communications that share this template and rely on the fixed height.
• Also trimmed tax_receipt_content's four stacked <br/> before the intro heading down to one.

3. Language mismatch on the child gift payment slip (compassion-switzerland)
4. Pager spacing on the donation history list (compassion-website)
5. Stale/corrupted "Date" column header in donation history (compassion-website) — DB-only fix, no commit

How to test manually

• Donations page (/my2/donations): download the tax receipt while browsing in different interface languages — the whole PDF (logo, salutation, date, body text, signature) should consistently follow whichever language you're browsing in.
• Once report_compassion can be upgraded again: download a gift payment slip for a sponsored child while browsing in a language different from the partner's stored profile language — labels and the child/gift communication line should match.
• Check the tax receipt PDF is one page, with reasonable spacing between the closing text and the signature.
• Check the "Date" column header in donation history reads correctly in French (already fixed at the DB level locally; will need the same -u --i18n-overwrite sync — or .po was already correct so a normal deploy pipeline that runs migrations properly should pick it up fine).
• Check spacing between the donation history rows and the Prev/Next pager.