Merge branch 'main' of https://github.com/vitorpamplona/amethyst

* 'main' of https://github.com/vitorpamplona/amethyst:
  New Crowdin translations by GitHub Action
  update translations: CZ, DE, PT, SE add: find missing translations skill

.claude/skills/find-missing-translations/SKILL.md

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+---
+name: find-missing-translations
+description: Use when comparing Android strings.xml locale files to find untranslated string resources, missing translation keys, or preparing translation work for a specific language
+---
+
+# Find Missing Translations
+
+## Overview
+
+Extract string resource keys from the default `values/strings.xml` that are absent in a target locale's `strings.xml`, excluding non-translatable entries. Outputs a table ready for translation.
+
+## When to Use
+
+- Need to find untranslated strings for a specific locale
+- Preparing a batch of strings for a translator
+- Checking translation coverage after adding new features
+
+## Technique
+
+### 1. Identify files
+
+```
+Default:  amethyst/src/main/res/values/strings.xml
+Target:   amethyst/src/main/res/values-<locale>/strings.xml
+```
+
+Default locale: `cs-rCZ` if none specified. User may override (e.g., `pt-rBR`, `ja`).
+
+### 2. Extract and diff keys
+
+Use a single bash pipeline to extract translatable keys from both files and diff them:
+
+```bash
+# Extract translatable keys from default (exclude translatable="false")
+comm -23 \
+  <(grep '<string name=' amethyst/src/main/res/values/strings.xml \
+    | grep -v 'translatable="false"' \
+    | sed 's/.*name="\([^"]*\)".*/\1/' | sort) \
+  <(grep '<string name=' amethyst/src/main/res/values-<LOCALE>/strings.xml \
+    | sed 's/.*name="\([^"]*\)".*/\1/' | sort)
+```
+
+This gives the list of missing key names.
+
+### 3. Get English values for missing keys
+
+For each missing key, extract its English value:
+
+```bash
+# For each missing key, extract the full line from default strings.xml
+while IFS= read -r key; do
+  grep "name=\"$key\"" amethyst/src/main/res/values/strings.xml
+done < <(comm -23 \
+  <(grep '<string name=' amethyst/src/main/res/values/strings.xml \
+    | grep -v 'translatable="false"' \
+    | sed 's/.*name="\([^"]*\)".*/\1/' | sort) \
+  <(grep '<string name=' amethyst/src/main/res/values-<LOCALE>/strings.xml \
+    | sed 's/.*name="\([^"]*\)".*/\1/' | sort))
+```
+
+### 4. Present results
+
+Output the missing entries as raw XML resource lines (copy-paste ready for the locale file):
+
+```xml
+    <string name="attestation_valid">Valid</string>
+    <string name="attestation_valid_from">Valid from %1$s</string>
+    <string name="feed_group_lists">Lists</string>
+```
+
+Also check `<string-array>` and `<plurals>` tags using the same approach if the project uses them.
+
+## Common Mistakes
+
+- **Forgetting `translatable="false"`** — these should never appear in locale files
+- **Not checking string-arrays/plurals** — only checking `<string>` misses other resource types
+- **Modifying files** — this is a read-only research task unless the user asks to add entries