Fix localization issues in 2026-03-09 opposition motions articles (14 languages)

[Copilot]

PR #935 introduced 14 language variants of the opposition motions article with several localization regressions identified in review. This PR addresses all of them.

Fixes

• Skip-link not localized — All 13 non-EN files had "Skip to main content" hardcoded; replaced with per-language strings matching the pattern established in 2026-02-13-evening-analysis-*.html
• Back-to-news links pointing to wrong index — All 13 non-EN files (header + footer <a> elements) linked to index.html; corrected to index_<lang>.html (e.g. index_da.html, index_sv.html)
• V party motion count inconsistency — Coalition Dynamics section showed Left Party (V): 5 motions in all 14 files; corrected to 4 to match the lede, party breakdown table, and PR data
• English body text in non-English articles — All 12 non-EN/non-SV files had untranslated English paragraphs in every "Why It Matters" block (19 per article); translated all to target language
• Inaccurate wordCount in Schema.org structured data — EN article hardcoded "wordCount": 2400; corrected to 1854 (actual count)

Scope

Issue	Files affected
Skip-link text	13 (all except en)
Back-to-news href	13 (all except en)
V count 5→4	14
Why It Matters translation	12 (all except en, sv)
wordCount	1 (en)

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