Persist Rust CI cache

.gitea/workflows/ci.yml

@@ -20,7 +20,13 @@ jobs:
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
             sh -s -- -y --profile minimal
           echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
-          "$HOME/.cargo/bin/rustup" toolchain install nightly --profile minimal
+          "$HOME/.cargo/bin/rustup" toolchain install nightly-2026-09-14 --profile minimal
+
+      - name: Cache Rust dependencies and build artifacts
+        uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+        with:
+          shared-key: linux-nightly
+          cache-bin: false
 
       - name: Install Linux dependencies
         run: |

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "nightly"
+channel = "nightly-2026-09-14"