Fix progression eccentric percent localization

[9thLevelSoftware]

Summary

• Add a reusable locale-aware integer percent formatter for arbitrary eccentric/progression percentages.
• Use it in ProgressionSettingsSheet for the eccentric progression percent value, with a 60.dp minimum width instead of the prior fixed 50.dp cell.
• Move the hard-coded "Increase eccentric load by" label into Compose resources, including an Italian translation.

Refs #540
Follow-up to #542 / Kanban task t_4d68d132.

Tests

• git diff --check
• bash .github/scripts/forbid-tracked-secrets.sh
• ./gradlew :shared:testAndroidHostTest -Pskip.supabase.check=true --no-daemon --console=plain
• ./gradlew :shared:compileKotlinIosArm64 :shared:compileTestKotlinIosArm64 -Pskip.supabase.check=true --no-daemon --console=plain
• ./gradlew spotlessCheck validateSchemaManifest :shared:verifyCommonMainVitruvianDatabaseMigration -Pskip.supabase.check=true --no-daemon --console=plain (partial: schema + migration passed; Spotless failed on pre-existing unrelated files outside this PR's diff. This PR's touched Kotlin files were formatted with spotlessKotlinApply, with unrelated formatter changes reverted.)

[Copilot]

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[gemini-code-assist]

Code Review

This pull request localizes the "Increase eccentric load by" string and introduces a locale-aware integer percentage formatter (integerPercentLabel) to prevent glyph collisions on Italian iOS devices. It also updates the progression settings sheet to use this formatter and adjusts the layout width accordingly. The review feedback suggests making the formatter more generic by accepting Number instead of Int to support float percentages, simplifying the language matching logic using substringBefore, and updating the associated wrappers, imports, and unit tests to use the renamed generic helpers.

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