feat(site,docs): Tane is in F-Droid — link it next to Play

The inclusion MR was merged on 2026-07-25 and the app page went live on
2026-07-28 (v0.1.16, no antifeatures), so the landing page can finally
offer both stores.

- site: publish the F-Droid link and give each store link a single-colour
  icon, so the two are told apart by shape (play triangle vs. the
  free-software robot) rather than by brand colour. The badge row is a
  flex row now: left-aligned in the hero, centred under "Get Tane".
- README: an Install section with both stores, and a Status that matches
  reality (Block 1 shipped, Block 2 under way) instead of "early design".
- release.md: record that the app is published, that further releases only
  need a versionCode bump in the fdroiddata recipe, and that publication
  lags the green build by a day or two.
- open-decisions.md: log what unblocked inclusion — reproducible
  developer-signed builds, a Google-free APK, and opt-in networking.

site/assets/css/main.css

@@ -219,7 +219,14 @@ h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); color: var(--green-dark); }
 .values li { margin: .45rem 0; }
 
 .get-it { text-align: center; }
-.store-badges { margin-top: 1.2rem; }
+.store-badges {
+  margin-top: 1.2rem;
+  display: flex;
+  flex-wrap: wrap;
+  gap: .6rem;
+  justify-content: inherit;
+}
+.get-it .store-badges { justify-content: center; }
 .coming-soon { color: var(--muted); font-style: italic; }
 .badge {
   display: inline-block;
@@ -231,6 +238,14 @@ h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); color: var(--green-dark); }
   margin: .3rem;
   font-weight: 600;
 }
+/* Store links: same pill, one-colour icon so Play and F-Droid read apart. */
+.badge-store {
+  display: inline-flex;
+  align-items: center;
+  gap: .55rem;
+  margin: 0;
+}
+.badge-store .store-icon { flex: none; }
 
 /* Legal docs */
 .doc { padding: 2rem 0 3rem; max-width: 760px; }

site/config.toml

@@ -16,7 +16,7 @@ enableGitInfo = false
   license = "AGPL-3.0"
   # Links rendered only when set, so nothing broken shows before they exist:
   playStoreURL = "https://play.google.com/store/apps/details?id=org.comunes.tane"   # Google Play
-  fdroidURL = ""      # F-Droid, once published
+  fdroidURL = "https://f-droid.org/packages/org.comunes.tane/"      # F-Droid, published 2026-07-28
   sourceURL = "https://git.comunes.org/comunes/tane"      # public source repository (AGPL)
   weblateURL = "https://translate.comunes.org/projects/tane/"     # translation platform
 

site/layouts/partials/store-badges.html

@@ -1,10 +1,26 @@
-{{- /* Renders store links only when configured, so nothing broken shows pre-launch. */ -}}
+{{- /* Renders store links only when configured, so nothing broken shows pre-launch.
+       Icons are single-colour (currentColor) so the two stores are told apart by
+       shape, not by brand colour: a play triangle vs. the free-software robot. */ -}}
 <div class="store-badges">
   {{- with .Site.Params.playStoreURL -}}
-  <a class="badge" href="{{ . }}">Google Play</a>
+  <a class="badge badge-store" href="{{ . }}">
+    <svg class="store-icon" aria-hidden="true" viewBox="0 0 24 24" width="22" height="22">
+      <path fill="currentColor" d="M4.6 2.1c-.3.2-.5.6-.5 1v17.8c0 .4.2.8.5 1l9.5-9.9-9.5-9.9zm10.9 8.5L6.2 1.4l11.4 6.6-2.1 2.6zM6.2 22.6l9.3-9.2 2.1 2.6-11.4 6.6zm12.6-7.3-2.4-2.9 2.4-2.9 2.7 1.6c.7.4.7 1.4 0 1.8l-2.7 1.6z"/>
+    </svg>
+    <span>Google Play</span>
+  </a>
   {{- end -}}
   {{- with .Site.Params.fdroidURL -}}
-  <a class="badge" href="{{ . }}">F-Droid</a>
+  <a class="badge badge-store" href="{{ . }}">
+    <svg class="store-icon" aria-hidden="true" viewBox="0 0 24 24" width="22" height="22">
+      <g fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round">
+        <path d="M8.1 2.6 9.8 5.7"/>
+        <path d="M15.9 2.6 14.2 5.7"/>
+      </g>
+      <path fill="currentColor" fill-rule="evenodd" d="M7.3 6.4h9.4c1.8 0 3.3 1.5 3.3 3.3v8.6c0 1.8-1.5 3.3-3.3 3.3H7.3A3.3 3.3 0 0 1 4 18.3V9.7c0-1.8 1.5-3.3 3.3-3.3zm1.8 4.8a1.4 1.4 0 1 0 0 2.8 1.4 1.4 0 0 0 0-2.8zm5.8 0a1.4 1.4 0 1 0 0 2.8 1.4 1.4 0 0 0 0-2.8z"/>
+    </svg>
+    <span>F-Droid</span>
+  </a>
   {{- end -}}
   {{- if and (not .Site.Params.playStoreURL) (not .Site.Params.fdroidURL) -}}
   <p class="coming-soon">{{ T "getItComingSoon" }}</p>