chore(release): prep v0.1.16 — say plainly which servers Tane talks to

The store listing claimed "No account, no server, no trackers" while the
app was dialling four relays at launch. The app side is fixed; this is
the half a reader sees.

- Store description, both locales: the false line is gone, and a new
  "Sharing needs the internet" block names relay.comunes.org (ours),
  nos.lol, relay.damus.io and relay.primal.net, says when Tane talks to
  them, what they can see (a key and an IP — no name, no account), and
  where to switch any or all of them off, or point Tane at your own.
  Deliberately plain: no protocol names, no jargon. The audience is
  gardeners; the technical detail belongs in the F-Droid thread.
- The same correction on the landing page (feature card, FAQ, status).
- 0.1.16+18, so the F-Droid recipe's versionCodes become 181/182/183.
  F-Droid reads fastlane metadata from the checkout of the newest built
  version, so the description only reaches it via a new release.

The recipe mirror's `commit:` still points at v0.1.15 — it needs a hash
that does not exist yet, and is synced here and in the fdroiddata fork
once v0.1.16 is tagged.

docs/fdroid/org.comunes.tane.yml

@@ -16,8 +16,8 @@ RepoType: git
 Repo: https://git.comunes.org/comunes/tane.git
 
 Builds:
-  - versionName: 0.1.15
-    versionCode: 171
+  - versionName: 0.1.16
+    versionCode: 181
     commit: f04dd3da1a3993c5a8f3222544f75b979d2c7f9d
     subdir: apps/app_seeds
     output: build/app/outputs/flutter-apk/app-armeabi-v7a-release.apk
@@ -53,8 +53,8 @@ Builds:
         $PUB_CACHE/hosted/pub.dev/flutter_tesseract_ocr-0.4.31/android/libs/tesseract4android-release.aar
       - $$flutter$$/bin/flutter build apk --release --split-per-abi --target-platform=android-arm
 
-  - versionName: 0.1.15
-    versionCode: 172
+  - versionName: 0.1.16
+    versionCode: 182
     commit: f04dd3da1a3993c5a8f3222544f75b979d2c7f9d
     subdir: apps/app_seeds
     output: build/app/outputs/flutter-apk/app-arm64-v8a-release.apk
@@ -90,8 +90,8 @@ Builds:
         $PUB_CACHE/hosted/pub.dev/flutter_tesseract_ocr-0.4.31/android/libs/tesseract4android-release.aar
       - $$flutter$$/bin/flutter build apk --release --split-per-abi --target-platform=android-arm64
 
-  - versionName: 0.1.15
-    versionCode: 173
+  - versionName: 0.1.16
+    versionCode: 183
     commit: f04dd3da1a3993c5a8f3222544f75b979d2c7f9d
     subdir: apps/app_seeds
     output: build/app/outputs/flutter-apk/app-x86_64-release.apk
@@ -131,8 +131,10 @@ Builds:
 # our own signed APK on the git.comunes.org release byte-for-byte, publishes OUR
 # APK (same signature as the Play build). Value is the SHA-256 of the tane-upload
 # signing certificate (public).
-# Note: `commit:` must be a full commit hash (not a tag) per F-Droid review;
-# f04dd3da1a3993c5a8f3222544f75b979d2c7f9d is the commit tag v0.1.15 points to.
+# Note: `commit:` must be a full commit hash (not a tag) per F-Droid review, so
+# it can only be filled in once the tag exists. The hash below still points at
+# v0.1.15; it is synced (here and in the fdroiddata fork) right after v0.1.16 is
+# tagged, before the fork's pipeline runs.
 AllowedAPKSigningKeys: ddfae432091b8248a8a4a1b353487fa626301f4357ef835e94ec312f69418e38
 
 AutoUpdateMode: Version
@@ -143,5 +145,5 @@ VercodeOperation:
   - '%c * 10 + 3'
 UpdateCheckData:
   apps/app_seeds/pubspec.yaml|version:\s*[\d.]+\+(\d+)|apps/app_seeds/pubspec.yaml|version:\s*([\d.]+)\+
-CurrentVersion: 0.1.15
-CurrentVersionCode: 173
+CurrentVersion: 0.1.16
+CurrentVersionCode: 183