Create /kb web page listing facts with confidence scores

The implementation is complete. The `/kb` web page now:

1. Fetches all facts from the database via `Fact.getAllFacts`
2. Displays each fact in a card showing:
   - Fact ID - Confidence score as a colored badge (green ≥80%,
   yellow ≥50%, red < - Project name - Fact content - Related files
   (if any) - Source task link (if any)

Task-Id: t-158.4

1 files changed, 36 insertions, 24 deletions

diff --git a/Omni/Jr/Web.hs b/Omni/Jr/Web.hs
index 0893d7c..f65f368 100644
--- a/Omni/Jr/Web.hs
+++ b/Omni/Jr/Web.hs
@@ -26,6 +26,7 @@ import qualified Lucid
 import qualified Lucid.Base as Lucid
 import qualified Network.Wai.Handler.Warp as Warp
 import Numeric (showFFloat)
+import qualified Omni.Fact as Fact
 import qualified Omni.Jr.Web.Style as Style
 import qualified Omni.Task.Core as TaskCore
 import Servant
@@ -129,7 +130,7 @@ data TaskDiffPage
 
 data StatsPage = StatsPage TaskCore.TaskStats (Maybe Text)
 
-newtype KBPage = KBPage [TaskCore.Task]
+newtype KBPage = KBPage [TaskCore.Fact]
 
 data EpicsPage = EpicsPage [TaskCore.Task] [TaskCore.Task]
 
@@ -545,33 +546,45 @@ instance Lucid.ToHtml InterventionPage where
 
 instance Lucid.ToHtml KBPage where
   toHtmlRaw = Lucid.toHtml
-  toHtml (KBPage tasks) =
+  toHtml (KBPage facts) =
     Lucid.doctypehtml_ <| do
       pageHead "Knowledge Base - Jr"
       Lucid.body_ <| do
         navbar
         Lucid.div_ [Lucid.class_ "container"] <| do
           Lucid.h1_ "Knowledge Base"
-          Lucid.p_ [Lucid.class_ "info-msg"] "Epic design documents and project knowledge."
-          if null tasks
-            then Lucid.p_ [Lucid.class_ "empty-msg"] "No epics with designs yet."
-            else Lucid.div_ [Lucid.class_ "task-list"] <| traverse_ renderEpicCard tasks
+          Lucid.p_ [Lucid.class_ "info-msg"] "Facts learned during task execution."
+          if null facts
+            then Lucid.p_ [Lucid.class_ "empty-msg"] "No facts recorded yet."
+            else Lucid.div_ [Lucid.class_ "task-list"] <| traverse_ renderFactCard facts
     where
-      renderEpicCard :: (Monad m) => TaskCore.Task -> Lucid.HtmlT m ()
-      renderEpicCard t =
-        Lucid.a_
-          [ Lucid.class_ "task-card task-card-link",
-            Lucid.href_ ("/tasks/" <> TaskCore.taskId t)
-          ]
-          <| do
-            Lucid.div_ [Lucid.class_ "task-header"] <| do
-              Lucid.span_ [Lucid.class_ "task-id"] (Lucid.toHtml (TaskCore.taskId t))
-              statusBadge (TaskCore.taskStatus t)
-            Lucid.p_ [Lucid.class_ "task-title"] (Lucid.toHtml (TaskCore.taskTitle t))
-            case TaskCore.taskDescription t of
-              Nothing -> pure ()
-              Just desc ->
-                Lucid.p_ [Lucid.class_ "kb-preview"] (Lucid.toHtml (Text.take 200 desc <> "..."))
+      renderFactCard :: (Monad m) => TaskCore.Fact -> Lucid.HtmlT m ()
+      renderFactCard f =
+        Lucid.div_ [Lucid.class_ "task-card"] <| do
+          Lucid.div_ [Lucid.class_ "task-header"] <| do
+            Lucid.span_ [Lucid.class_ "task-id"] (Lucid.toHtml (maybe "-" tshow (TaskCore.factId f)))
+            confidenceBadge (TaskCore.factConfidence f)
+            Lucid.span_ [Lucid.class_ "priority"] (Lucid.toHtml (TaskCore.factProject f))
+          Lucid.p_ [Lucid.class_ "task-title"] (Lucid.toHtml (TaskCore.factContent f))
+          unless (null (TaskCore.factRelatedFiles f)) <| do
+            Lucid.p_ [Lucid.class_ "kb-files"] <| do
+              Lucid.span_ [Lucid.class_ "files-label"] "Files: "
+              Lucid.toHtml (Text.intercalate ", " (TaskCore.factRelatedFiles f))
+          case TaskCore.factSourceTask f of
+            Nothing -> pure ()
+            Just tid ->
+              Lucid.p_ [Lucid.class_ "kb-source"] <| do
+                Lucid.span_ [Lucid.class_ "source-label"] "Source: "
+                Lucid.a_ [Lucid.href_ ("/tasks/" <> tid)] (Lucid.toHtml tid)
+
+      confidenceBadge :: (Monad m) => Double -> Lucid.HtmlT m ()
+      confidenceBadge conf =
+        let pct = floor (conf * 100) :: Int
+            cls
+              | conf >= 0.8 = "badge badge-done"
+              | conf >= 0.5 = "badge badge-inprogress"
+              | otherwise = "badge badge-open"
+         in Lucid.span_ [Lucid.class_ cls] (Lucid.toHtml (tshow pct <> "%"))
 
 instance Lucid.ToHtml EpicsPage where
   toHtmlRaw = Lucid.toHtml
@@ -1541,9 +1554,8 @@ server =
 
     kbHandler :: Servant.Handler KBPage
     kbHandler = do
-      allTasks <- liftIO TaskCore.loadTasks
-      let epicTasks = filter (\t -> TaskCore.taskType t == TaskCore.Epic) allTasks
-      pure (KBPage epicTasks)
+      facts <- liftIO Fact.getAllFacts
+      pure (KBPage facts)
 
     epicsHandler :: Servant.Handler EpicsPage
     epicsHandler = do