fix(fdroid): correct metadata format to fastlane convention + add icon.png

Inspection of the local Hetzner-synced F-Droid repo after v0.1.0
revealed that fdroidserver only partially picked up Calendula's
metadata: summary was sourced from the YAML fallback (en-US only),
description appeared only for the "de" locale (not de-DE), and no
icon was shown anywhere. Root cause: we wrote Google Play conventions
(short_description.txt, full_description.txt, bare locale code "de")
where fdroidserver expects the fastlane format that the sibling
HouseHoldKeaper repo already uses successfully.

Changes:
- de/ -> de-DE/ (BCP-47 with region matches HHK and is more reliably
  parsed by fdroidserver)
- short_description.txt -> summary.txt
- full_description.txt -> description.txt
- Add icon.png (512x512) per locale, composed from the adaptive icon's
  foreground path + slate background (rendered via rsvg-convert).
  Required because XML-only adaptive icons in the APK aren't
  auto-rasterized by fdroidserver.

Verified locally against the previously-broken index by composing the
new icon and renaming the files in-tree.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.1.1] — 2026-06-08
+
+### Fixed
+- F-Droid metadata format: renamed locale dirs from `de/` to `de-DE/`,
+  `short_description.txt` to `summary.txt`, `full_description.txt` to
+  `description.txt` (fastlane format that fdroidserver actually reads,
+  matching the working HouseHoldKeaper convention)
+- Added `icon.png` (512x512) per locale; fdroidserver does NOT
+  auto-extract icons from APKs that only contain XML adaptive icons
+  (which is what minSdk-29 apps produce), so the app was rendered
+  blank-iconed in F-Droid clients
+
+### Changed
+- CI pipeline cleanup: `lintDebug`/`testDebugUnitTest` instead of full
+  `lint`/`test` (cuts ~50% of lint work since release variant lint is
+  redundant for V1 single-variant build)
+- Release workflow drops the lint step from its CI-sanity job since
+  the same lint already ran via `ci.yaml` when the underlying commit
+  hit main
+
 ## [0.1.0] — 2026-06-08
 
 ### Added