refactor(web): add has_ai_extract flag to all page templates

Propagate has_ai_extract boolean through every template struct and
route handler so nav.html can conditionally show the scan link.

src/application/routes/auth.rs

@@ -20,6 +20,7 @@ const SESSION_COOKIE_NAME: &str = "brewlog_session";
 struct LoginTemplate {
     nav_active: &'static str,
     is_authenticated: bool,
+    has_ai_extract: bool,
     error: Option<String>,
 }
 
@@ -42,6 +43,7 @@ pub(crate) async fn login_page(
     let template = LoginTemplate {
         nav_active: "login",
         is_authenticated: false,
+        has_ai_extract: false,
         error: None,
     };
 
@@ -130,6 +132,7 @@ fn show_login_error(message: &str) -> Result<Response, StatusCode> {
     let template = LoginTemplate {
         nav_active: "login",
         is_authenticated: false,
+        has_ai_extract: false,
         error: Some(message.to_string()),
     };
 

src/application/routes/bags.rs

@@ -99,6 +99,7 @@ pub(crate) async fn bags_page(
     let template = BagsTemplate {
         nav_active: "bags",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         open_bags,
         bags,
         roaster_options,

src/application/routes/brews.rs

@@ -186,6 +186,7 @@ pub(crate) async fn brews_page(
     let template = BrewsTemplate {
         nav_active: "brews",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         brews,
         bag_options,
         grinder_options,

src/application/routes/cafes.rs

@@ -69,6 +69,7 @@ pub(crate) async fn cafes_page(
     let template = CafesTemplate {
         nav_active: "cafes",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         cafes,
         navigator,
     };
@@ -94,6 +95,7 @@ pub(crate) async fn cafe_page(
     let template = CafeDetailTemplate {
         nav_active: "cafes",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         cafe: cafe_view,
     };
 

src/application/routes/cups.rs

@@ -74,6 +74,7 @@ pub(crate) async fn cups_page(
     let template = CupsTemplate {
         nav_active: "cups",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         cups,
         roast_options,
         cafe_options,

src/application/routes/gear.rs

@@ -71,6 +71,7 @@ pub(crate) async fn gear_page(
     let template = GearTemplate {
         nav_active: "gear",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         gear,
         navigator,
     };

src/application/routes/roasters.rs

@@ -101,6 +101,7 @@ pub(crate) async fn roaster_page(
     let template = RoasterDetailTemplate {
         nav_active: "roasters",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         roaster: roaster_view,
         roasts: roasts.into_iter().map(RoastView::from_list_item).collect(),
     };

src/application/routes/roasts.rs

@@ -121,6 +121,7 @@ pub(crate) async fn roast_page(
     let template = RoastDetailTemplate {
         nav_active: "roasts",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         roast: RoastView::from_domain(roast, &roaster.name, &roaster.slug),
         bags: bag_views,
     };

src/application/routes/timeline.rs

@@ -93,6 +93,7 @@ pub(crate) async fn timeline_page(
     let template = TimelineTemplate {
         nav_active: "timeline",
         is_authenticated,
+        has_ai_extract: state.has_ai_extract(),
         events: data.events,
         navigator: data.navigator,
         months: data.months,

src/presentation/web/templates.rs

@@ -37,6 +37,7 @@ pub struct RoasterListTemplate {
 pub struct RoasterDetailTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub roaster: RoasterView,
     pub roasts: Vec<RoastView>,
 }
@@ -57,6 +58,7 @@ pub struct RoastsTemplate {
 pub struct RoastDetailTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub roast: RoastView,
     pub bags: Vec<BagView>,
 }
@@ -74,6 +76,7 @@ pub struct RoastListTemplate {
 pub struct TimelineTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub events: Paginated<TimelineEventView>,
     pub navigator: ListNavigator<TimelineSortKey>,
     pub months: Vec<TimelineMonthView>,
@@ -93,6 +96,7 @@ pub struct TimelineChunkTemplate {
 pub struct BagsTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub open_bags: Vec<BagView>,
     pub bags: Paginated<BagView>,
     pub roaster_options: Vec<RoasterOptionView>,
@@ -113,6 +117,7 @@ pub struct BagListTemplate {
 pub struct GearTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub gear: Paginated<GearView>,
     pub navigator: ListNavigator<GearSortKey>,
 }
@@ -136,6 +141,7 @@ pub struct RoastOptionsTemplate {
 pub struct BrewsTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub brews: Paginated<BrewView>,
     pub bag_options: Vec<BagOptionView>,
     pub grinder_options: Vec<GearOptionView>,
@@ -158,6 +164,7 @@ pub struct BrewListTemplate {
 pub struct CafesTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub cafes: Paginated<CafeView>,
     pub navigator: ListNavigator<CafeSortKey>,
 }
@@ -175,6 +182,7 @@ pub struct CafeListTemplate {
 pub struct CafeDetailTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub cafe: CafeView,
 }
 
@@ -183,6 +191,7 @@ pub struct CafeDetailTemplate {
 pub struct CupsTemplate {
     pub nav_active: &'static str,
     pub is_authenticated: bool,
+    pub has_ai_extract: bool,
     pub cups: Paginated<CupView>,
     pub roast_options: Vec<RoastOptionView>,
     pub cafe_options: Vec<CafeOptionView>,
@@ -197,6 +206,14 @@ pub struct CupListTemplate {
     pub navigator: ListNavigator<CupSortKey>,
 }
 
+#[derive(Template)]
+#[template(path = "scan.html")]
+pub struct ScanTemplate {
+    pub nav_active: &'static str,
+    pub is_authenticated: bool,
+    pub has_ai_extract: bool,
+}
+
 pub fn render_template<T: Template>(template: T) -> Result<String, askama::Error> {
     template.render()
 }