feat(version): bake release tag into binary; About card and /health field

The version tag previously existed only in git and the Docker image tag —
the running app had no way to report what build it was. Version is now
injected at build time via -ldflags into internal/version.Version (defaults
to "dev" for local builds), passed by the release workflow as the
APP_VERSION Docker build arg from the pushed tag.

Surfaced in Admin → Settings → About (extensible card for future rows like
disk space) and in the /health JSON response, so deployments can be
verified with curl alone.

.gitea/workflows/release.yml

@@ -56,6 +56,9 @@ jobs:
           context: .
           file: ./Dockerfile
           push: true
+          # Bake the version into the binary (Admin → Settings → About).
+          build-args: |
+            APP_VERSION=${{ env.TAG }}
           # Publishes both the exact version (e.g. v0.2.0) and the movable "latest" tag.
           # Deployments default to "latest" via ${IMAGE_TAG:-latest} in docker-compose.yml;
           # pin or roll back by setting IMAGE_TAG in .env.

Dockerfile

@@ -37,10 +37,17 @@ RUN cd templates && templ generate
 RUN npm run build:css:prod
 RUN npm run build:ts
 
+# App version baked into the binary (shown in Admin → Settings → About).
+# Declared after `COPY . .` so a version bump only invalidates this layer.
+# The release workflow passes the git tag, e.g. APP_VERSION=v1.5.
+ARG APP_VERSION=dev
+
 # Build Go binary (cached unless Go files or generated code changes)
 RUN --mount=type=cache,target=/root/go/pkg/mod \
   --mount=type=cache,target=/root/.cache/go-build \
-  CGO_ENABLED=0 GOOS=linux go build -installsuffix cgo -o main ./cmd/server
+  CGO_ENABLED=0 GOOS=linux go build -installsuffix cgo \
+  -ldflags "-X bookhoard/internal/version.Version=${APP_VERSION}" \
+  -o main ./cmd/server
 
 # Materialize the Go module cache into an image layer so the test-runner
 # stage can restore it. GOMODCACHE is /go/pkg/mod; cache mounts elsewhere are

internal/router/frontend.go

@@ -17,6 +17,7 @@ import (
 	"bookhoard/internal/handlers"
 	"bookhoard/internal/services"
 	"bookhoard/internal/utils"
+	"bookhoard/internal/version"
 	"bookhoard/templates"
 
 	"github.com/golang-jwt/jwt/v5"
@@ -1455,6 +1456,7 @@ func (cfg *Config) GetHealth(c *echo.Context) error {
 
 	return c.JSON(http.StatusOK, map[string]interface{}{
 		"status":   "healthy",
+		"version":  version.Version,
 		"database": "connected",
 		"scan": map[string]interface{}{
 			"scan_in_progress": cfg.Worker.HasActiveScans(),

internal/version/version.go

@@ -0,0 +1,10 @@
+package version
+
+// Version is the app version. It defaults to "dev" for local builds and is
+// overridden at build time in release images via:
+//
+//	go build -ldflags "-X bookhoard/internal/version.Version=v1.5"
+//
+// The release workflow passes the git tag (e.g. v1.5) as the APP_VERSION
+// Docker build arg, which the Dockerfile forwards to this flag.
+var Version = "dev"

templates/admin_settings.templ

@@ -1,6 +1,9 @@
 package templates
 
-import "fmt"
+import (
+	"bookhoard/internal/version"
+	"fmt"
+)
 
 templ AdminSettings(user User, systemConfig map[string]string, scanSettings ScanSettingsData, liveGroups []SettingGroup, restartGroups []SettingGroup, errorMessage string) {
 	<!DOCTYPE html>
@@ -111,6 +114,7 @@ templ AdminSettings(user User, systemConfig map[string]string, scanSettings Scan
 				@ScanSettingsSection(scanSettings)
 				@TunableSettingsSection(liveGroups, false)
 				@TunableSettingsSection(restartGroups, true)
+				@AboutSection()
 			</div>
 		</main>
 	</body>
@@ -255,3 +259,18 @@ templ TunableSettingRow(e SettingEntry) {
 		<span id={ "status-" + e.Key } class="text-xs w-24 text-right" style="color: var(--text-secondary)"></span>
 	</div>
 }
+
+// AboutSection shows build metadata, rendered at the bottom of the System
+// Settings page. Add future rows (disk space, uptime, Go version, …) to the
+// list below.
+templ AboutSection() {
+	<div class="mt-6 card p-6">
+		<div class="flex items-center gap-2 mb-4">
+			@Icon("info", "h-5 w-5 shrink-0")
+			<h3 class="text-lg font-semibold" style="color: var(--text-primary)">About</h3>
+		</div>
+		<div class="space-y-2 text-sm" style="color: var(--text-secondary);">
+			<p><span class="font-medium uppercase tracking-wide text-xs" style="color: var(--text-secondary)">Version:</span> { version.Version }</p>
+		</div>
+	</div>
+}

templates/admin_settings_templ.go

@@ -8,7 +8,10 @@ package templates
 import "github.com/a-h/templ"
 import templruntime "github.com/a-h/templ/runtime"
 
-import "fmt"
+import (
+	"bookhoard/internal/version"
+	"fmt"
+)
 
 func AdminSettings(user User, systemConfig map[string]string, scanSettings ScanSettingsData, liveGroups []SettingGroup, restartGroups []SettingGroup, errorMessage string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
@@ -67,7 +70,7 @@ func AdminSettings(user User, systemConfig map[string]string, scanSettings ScanS
 			var templ_7745c5c3_Var2 string
 			templ_7745c5c3_Var2, templ_7745c5c3_Err = templ.JoinStringErrs(errorMessage)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 31, Col: 28}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 34, Col: 28}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var2))
 			if templ_7745c5c3_Err != nil {
@@ -93,7 +96,7 @@ func AdminSettings(user User, systemConfig map[string]string, scanSettings ScanS
 		var templ_7745c5c3_Var3 string
 		templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.ResolveAttributeValue(systemConfig["base_url"])
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 45, Col: 42}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 48, Col: 42}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var3)
 		if templ_7745c5c3_Err != nil {
@@ -370,7 +373,7 @@ func AdminSettings(user User, systemConfig map[string]string, scanSettings ScanS
 		var templ_7745c5c3_Var4 string
 		templ_7745c5c3_Var4, templ_7745c5c3_Err = templ.JoinStringErrs(systemConfig["base_url"])
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 106, Col: 145}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 109, Col: 145}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var4))
 		if templ_7745c5c3_Err != nil {
@@ -383,7 +386,7 @@ func AdminSettings(user User, systemConfig map[string]string, scanSettings ScanS
 		var templ_7745c5c3_Var5 string
 		templ_7745c5c3_Var5, templ_7745c5c3_Err = templ.JoinStringErrs(systemConfig["base_url"])
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 107, Col: 144}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 110, Col: 144}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var5))
 		if templ_7745c5c3_Err != nil {
@@ -396,7 +399,7 @@ func AdminSettings(user User, systemConfig map[string]string, scanSettings ScanS
 		var templ_7745c5c3_Var6 string
 		templ_7745c5c3_Var6, templ_7745c5c3_Err = templ.JoinStringErrs(systemConfig["base_url"])
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 108, Col: 152}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 111, Col: 152}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var6))
 		if templ_7745c5c3_Err != nil {
@@ -418,6 +421,10 @@ func AdminSettings(user User, systemConfig map[string]string, scanSettings ScanS
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
+		templ_7745c5c3_Err = AboutSection().Render(ctx, templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
 		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 64, "</div></main></body></html>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
@@ -472,7 +479,7 @@ func ScanSettingsSection(scanSettings ScanSettingsData) templ.Component {
 		var templ_7745c5c3_Var8 string
 		templ_7745c5c3_Var8, templ_7745c5c3_Err = templ.ResolveAttributeValue(fmt.Sprintf("%d", scanSettings.ScanPollIntervalSeconds))
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 154, Col: 69}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 158, Col: 69}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var8)
 		if templ_7745c5c3_Err != nil {
@@ -564,7 +571,7 @@ func TunableSettingsSection(groups []SettingGroup, restartRequired bool) templ.C
 			var templ_7745c5c3_Var10 string
 			templ_7745c5c3_Var10, templ_7745c5c3_Err = templ.JoinStringErrs(g.Name)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 194, Col: 112}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 198, Col: 112}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var10))
 			if templ_7745c5c3_Err != nil {
@@ -622,7 +629,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 		var templ_7745c5c3_Var12 string
 		templ_7745c5c3_Var12, templ_7745c5c3_Err = templ.JoinStringErrs(e.Description)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 209, Col: 94}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 213, Col: 94}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var12))
 		if templ_7745c5c3_Err != nil {
@@ -640,7 +647,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 			var templ_7745c5c3_Var13 string
 			templ_7745c5c3_Var13, templ_7745c5c3_Err = templ.JoinStringErrs(e.Key)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 211, Col: 74}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 215, Col: 74}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var13))
 			if templ_7745c5c3_Err != nil {
@@ -658,7 +665,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 			var templ_7745c5c3_Var14 string
 			templ_7745c5c3_Var14, templ_7745c5c3_Err = templ.JoinStringErrs(e.Key)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 213, Col: 74}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 217, Col: 74}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var14))
 			if templ_7745c5c3_Err != nil {
@@ -676,7 +683,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 		var templ_7745c5c3_Var15 string
 		templ_7745c5c3_Var15, templ_7745c5c3_Err = templ.ResolveAttributeValue("#status-" + e.Key)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 219, Col: 33}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 223, Col: 33}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var15)
 		if templ_7745c5c3_Err != nil {
@@ -689,7 +696,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 		var templ_7745c5c3_Var16 string
 		templ_7745c5c3_Var16, templ_7745c5c3_Err = templ.ResolveAttributeValue(e.Key)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 223, Col: 48}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 227, Col: 48}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var16)
 		if templ_7745c5c3_Err != nil {
@@ -732,7 +739,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 			var templ_7745c5c3_Var17 string
 			templ_7745c5c3_Var17, templ_7745c5c3_Err = templ.ResolveAttributeValue(e.Value)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 233, Col: 20}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 237, Col: 20}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var17)
 			if templ_7745c5c3_Err != nil {
@@ -750,7 +757,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 				var templ_7745c5c3_Var18 string
 				templ_7745c5c3_Var18, templ_7745c5c3_Err = templ.ResolveAttributeValue(e.Min)
 				if templ_7745c5c3_Err != nil {
-					return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 235, Col: 17}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 239, Col: 17}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var18)
 				if templ_7745c5c3_Err != nil {
@@ -769,7 +776,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 				var templ_7745c5c3_Var19 string
 				templ_7745c5c3_Var19, templ_7745c5c3_Err = templ.ResolveAttributeValue(e.Max)
 				if templ_7745c5c3_Err != nil {
-					return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 238, Col: 17}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 242, Col: 17}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var19)
 				if templ_7745c5c3_Err != nil {
@@ -792,7 +799,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 			var templ_7745c5c3_Var20 string
 			templ_7745c5c3_Var20, templ_7745c5c3_Err = templ.ResolveAttributeValue(e.Value)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 246, Col: 20}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 250, Col: 20}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var20)
 			if templ_7745c5c3_Err != nil {
@@ -818,7 +825,7 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 		var templ_7745c5c3_Var21 string
 		templ_7745c5c3_Var21, templ_7745c5c3_Err = templ.ResolveAttributeValue("status-" + e.Key)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 255, Col: 30}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 259, Col: 30}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var21)
 		if templ_7745c5c3_Err != nil {
@@ -832,4 +839,57 @@ func TunableSettingRow(e SettingEntry) templ.Component {
 	})
 }
 
+// AboutSection shows build metadata, rendered at the bottom of the System
+// Settings page. Add future rows (disk space, uptime, Go version, …) to the
+// list below.
+func AboutSection() templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		if templ_7745c5c3_CtxErr := ctx.Err(); templ_7745c5c3_CtxErr != nil {
+			return templ_7745c5c3_CtxErr
+		}
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var22 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var22 == nil {
+			templ_7745c5c3_Var22 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 107, "<div class=\"mt-6 card p-6\"><div class=\"flex items-center gap-2 mb-4\">")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = Icon("info", "h-5 w-5 shrink-0").Render(ctx, templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 108, "<h3 class=\"text-lg font-semibold\" style=\"color: var(--text-primary)\">About</h3></div><div class=\"space-y-2 text-sm\" style=\"color: var(--text-secondary);\"><p><span class=\"font-medium uppercase tracking-wide text-xs\" style=\"color: var(--text-secondary)\">Version:</span> ")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		var templ_7745c5c3_Var23 string
+		templ_7745c5c3_Var23, templ_7745c5c3_Err = templ.JoinStringErrs(version.Version)
+		if templ_7745c5c3_Err != nil {
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `admin_settings.templ`, Line: 273, Col: 134}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var23))
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 109, "</p></div></div>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return nil
+	})
+}
+
 var _ = templruntime.GeneratedTemplate