refactor: upgrade to Go 1.26 and modernize code idioms

- Replace `interface{}` with `any` type alias across all packages
- Use built-in `min()`/`max()` for parameter clamping
- Use `slices.SortFunc`, `slices.Min`, `slices.Max` for cleaner code
- Use `strings.Cut()` for simpler string parsing in auth middleware
- Use `errors.Is()` for proper error comparison in handlers
- Update dependencies: golang.org/x/image 0.37.0 -> 0.38.0
- Add Wire code generation guidelines to ARCHITECTURE.md
- Disable Go cache in CI build workflow

.gitea/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
-          cache: true
+          cache: false
 
       - name: Go cache info
         run: |