diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 24d8e10..3beceee 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v7
         with:
-          go-version: stable
+          go-version-file: "go.mod"
       - name: Lint
         uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.11.3
+          version: v2.12.2
diff --git a/devbox.json b/devbox.json
index a1aa3e9..5fde00a 100644
--- a/devbox.json
+++ b/devbox.json
@@ -1,12 +1,12 @@
 {
   "$schema": "https://raw.githubusercontent.com/jetify-com/devbox/0.14.0/.schema/devbox.schema.json",
   "packages": {
-    "go": "1.22.6",
-    "gopls": "latest",
-    "golangci-lint": "2.11.3",
-    "svu": "latest",
-    "git": "latest",
-    "go-task": "latest"
+    "go":            "1.26.5",
+    "gopls":         "latest",
+    "svu":           "latest",
+    "git":           "latest",
+    "go-task":       "latest",
+    "golangci-lint": "2.12.2"
   },
   "shell": {
     "scripts": {
diff --git a/devbox.lock b/devbox.lock
index e1c7f7e..ee742ba 100644
--- a/devbox.lock
+++ b/devbox.lock
@@ -124,99 +124,89 @@
         }
       }
     },
-    "go@1.22.6": {
-      "last_modified": "2024-08-31T10:12:23Z",
-      "resolved": "github:NixOS/nixpkgs/5629520edecb69630a3f4d17d3d33fc96c13f6fe#go",
+    "go@1.26.5": {
+      "last_modified": "2026-08-12T11:28:58Z",
+      "resolved": "github:NixOS/nixpkgs/044bfe75bfe4c7bbe043dc17b5e42ea823b84a09#go",
       "source": "devbox-search",
-      "version": "1.22.6",
+      "version": "1.26.5",
       "systems": {
         "aarch64-darwin": {
           "outputs": [
             {
               "name": "out",
-              "path": "/nix/store/bman2jjx2ykfclj3g0wb89cxyzqygh8y-go-1.22.6",
+              "path": "/nix/store/4im44k446822ixjai0mdaizqskc90qxr-go-1.26.5",
               "default": true
             }
           ],
-          "store_path": "/nix/store/bman2jjx2ykfclj3g0wb89cxyzqygh8y-go-1.22.6"
+          "store_path": "/nix/store/4im44k446822ixjai0mdaizqskc90qxr-go-1.26.5"
         },
         "aarch64-linux": {
           "outputs": [
             {
               "name": "out",
-              "path": "/nix/store/gnm672jywl1b778ql6pf57xka45452b6-go-1.22.6",
+              "path": "/nix/store/yjifjy7qjzm9jli8xhzwy3y6fzw84405-go-1.26.5",
               "default": true
             }
           ],
-          "store_path": "/nix/store/gnm672jywl1b778ql6pf57xka45452b6-go-1.22.6"
-        },
-        "x86_64-darwin": {
-          "outputs": [
-            {
-              "name": "out",
-              "path": "/nix/store/qvr3slzx5av20xkw6i97yz7wla9sf4nc-go-1.22.6",
-              "default": true
-            }
-          ],
-          "store_path": "/nix/store/qvr3slzx5av20xkw6i97yz7wla9sf4nc-go-1.22.6"
+          "store_path": "/nix/store/yjifjy7qjzm9jli8xhzwy3y6fzw84405-go-1.26.5"
         },
         "x86_64-linux": {
           "outputs": [
             {
               "name": "out",
-              "path": "/nix/store/6rybf4g5b77kz27k07avr7qd44ssw3l2-go-1.22.6",
+              "path": "/nix/store/xrgn6m0c5vbz06467q06zdwnk6qqdl7z-go-1.26.5",
               "default": true
             }
           ],
-          "store_path": "/nix/store/6rybf4g5b77kz27k07avr7qd44ssw3l2-go-1.22.6"
+          "store_path": "/nix/store/xrgn6m0c5vbz06467q06zdwnk6qqdl7z-go-1.26.5"
         }
       }
     },
-    "golangci-lint@2.11.3": {
-      "last_modified": "2026-03-11T04:01:32Z",
-      "resolved": "github:NixOS/nixpkgs/b6067cc0127d4db9c26c79e4de0513e58d0c40c9#golangci-lint",
+    "golangci-lint@2.12.2": {
+      "last_modified": "2026-08-12T11:28:58Z",
+      "resolved": "github:NixOS/nixpkgs/044bfe75bfe4c7bbe043dc17b5e42ea823b84a09#golangci-lint",
       "source": "devbox-search",
-      "version": "2.11.3",
+      "version": "2.12.2",
       "systems": {
         "aarch64-darwin": {
           "outputs": [
             {
               "name": "out",
-              "path": "/nix/store/zalxgqwyng4jdbv5cpsmm9xbmim9hjjj-golangci-lint-2.11.3",
+              "path": "/nix/store/cqawpcdr4iif6g81i9flza941zxzgac5-golangci-lint-2.12.2",
               "default": true
             }
           ],
-          "store_path": "/nix/store/zalxgqwyng4jdbv5cpsmm9xbmim9hjjj-golangci-lint-2.11.3"
+          "store_path": "/nix/store/cqawpcdr4iif6g81i9flza941zxzgac5-golangci-lint-2.12.2"
         },
         "aarch64-linux": {
           "outputs": [
             {
               "name": "out",
-              "path": "/nix/store/mbra9idrmw8f8a4sqv2d0bf6vw8gcmfp-golangci-lint-2.11.3",
+              "path": "/nix/store/dyiky0qyz8p8z3c54rz5z2qdwbrf05c7-golangci-lint-2.12.2",
               "default": true
             }
           ],
-          "store_path": "/nix/store/mbra9idrmw8f8a4sqv2d0bf6vw8gcmfp-golangci-lint-2.11.3"
+          "store_path": "/nix/store/dyiky0qyz8p8z3c54rz5z2qdwbrf05c7-golangci-lint-2.12.2"
         },
         "x86_64-darwin": {
           "outputs": [
             {
               "name": "out",
-              "path": "/nix/store/ph64c01zwvbr9xvxydxa8ijvbdfax8fy-golangci-lint-2.11.3",
+              "path": "/nix/store/w8c3i6vmxnnj0xixvjsa9lva3rcd2rvs-golangci-lint-2.12.2",
               "default": true
             }
           ],
-          "store_path": "/nix/store/ph64c01zwvbr9xvxydxa8ijvbdfax8fy-golangci-lint-2.11.3"
+          "store_path": "/nix/store/w8c3i6vmxnnj0xixvjsa9lva3rcd2rvs-golangci-lint-2.12.2"
         },
         "x86_64-linux": {
           "outputs": [
             {
               "name": "out",
-              "path": "/nix/store/i1xcg5f24w70llk4v6lzi0vi4jf3ma5k-golangci-lint-2.11.3",
+              "path": "/nix/store/yl3hlickshlf7smf4iql5lalmhi6hhqg-golangci-lint-2.12.2",
               "default": true
             }
           ],
-          "store_path": "/nix/store/i1xcg5f24w70llk4v6lzi0vi4jf3ma5k-golangci-lint-2.11.3"
+          "store_path": "/nix/store/yl3hlickshlf7smf4iql5lalmhi6hhqg-golangci-lint-2.12.2"
         }
       }
     },
diff --git a/pkg/ui/panes/diffviewer/diffviewer.go b/pkg/ui/panes/diffviewer/diffviewer.go
index c01d5d4..f7f88fa 100644
--- a/pkg/ui/panes/diffviewer/diffviewer.go
+++ b/pkg/ui/panes/diffviewer/diffviewer.go
@@ -214,7 +214,6 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		m.fvp.SetObjects(msg.lines)
 	}
 
-	m.fvp.SetHeader(strings.Split(m.headerView(), "\n"))
 	fvp, fvpCmd := m.fvp.Update(msg)
 	cmds = append(cmds, fvpCmd)
 	m.fvp = fvp
@@ -344,6 +343,7 @@ func (m Model) SetFilePatch(file *gitdiff.File) (Model, tea.Cmd) {
 	key := cacheKey(fname, m.sideBySide)
 	if cached, ok := m.cache[key]; ok {
 		m.file = cached
+		m.updateHeader()
 		m.fvp.SetObjects(cached.diff)
 		return m, nil
 	}
@@ -358,7 +358,7 @@ func (m Model) SetFilePatch(file *gitdiff.File) (Model, tea.Cmd) {
 		deletions: deletions,
 	}
 	m.cache[key] = m.file
-
+	m.updateHeader()
 	return m, diffFile(m.file, m.contentWidth(), m.sideBySide)
 }
 
@@ -368,6 +368,7 @@ func (m Model) SetDirPatch(dirPath string, files []*gitdiff.File) (Model, tea.Cm
 	key := cacheKey(dirPath, m.sideBySide)
 	if cached, ok := m.cache[key]; ok {
 		m.dir = cached
+		m.updateHeader()
 		m.fvp.SetObjects(cached.diff)
 		return m, nil
 	}
@@ -389,9 +390,15 @@ func (m Model) SetDirPatch(dirPath string, files []*gitdiff.File) (Model, tea.Cm
 	if dirPath == "/" {
 		preamble = m.preamble
 	}
+
+	m.updateHeader()
 	return m, diffDir(m.dir, m.contentWidth(), m.sideBySide, preamble)
 }
 
+func (m *Model) updateHeader() {
+	m.fvp.SetHeader(strings.Split(m.headerView(), "\n"))
+}
+
 // SetSideBySide updates the diff view mode and re-renders.
 func (m *Model) SetSideBySide(sideBySide bool) tea.Cmd {
 	m.sideBySide = sideBySide