fix: code review cleanup - schema sync, type safety, null handling

- Sync KnowledgeLink schema with migration (add displayText, positionStart, positionEnd, resolved)
- Make targetId optional to support unresolved links
- Fix null handling in graph.service.ts (skip unresolved links)
- Add explicit types to frontend components (remove implicit any)
- Remove unused WikiLink import
- Add null-safe statusInfo check in EntryCard

apps/api/prisma/schema.prisma

@@ -750,18 +750,22 @@ model KnowledgeLink {
   sourceId String         @map("source_id") @db.Uuid
   source   KnowledgeEntry @relation("SourceEntry", fields: [sourceId], references: [id], onDelete: Cascade)
 
-  targetId String         @map("target_id") @db.Uuid
-  target   KnowledgeEntry @relation("TargetEntry", fields: [targetId], references: [id], onDelete: Cascade)
+  targetId String?        @map("target_id") @db.Uuid
+  target   KnowledgeEntry? @relation("TargetEntry", fields: [targetId], references: [id], onDelete: Cascade)
 
   // Link metadata
-  linkText String  @map("link_text")
-  context  String?
+  linkText      String  @map("link_text")
+  displayText   String  @map("display_text")
+  positionStart Int     @map("position_start")
+  positionEnd   Int     @map("position_end")
+  resolved      Boolean @default(false)
+  context       String?
 
   createdAt DateTime @default(now()) @map("created_at") @db.Timestamptz
 
-  @@unique([sourceId, targetId])
   @@index([sourceId])
   @@index([targetId])
+  @@index([sourceId, resolved])
   @@map("knowledge_links")
 }
 

apps/api/src/knowledge/services/graph.service.ts

@@ -104,8 +104,11 @@ export class GraphService {
 
       // Continue BFS if not at max depth
       if (depth < maxDepth) {
-        // Process outgoing links
+        // Process outgoing links (only resolved ones)
         for (const link of currentEntry.outgoingLinks) {
+          // Skip unresolved links
+          if (!link.targetId || !link.resolved) continue;
+
           // Add edge
           edges.push({
             id: link.id,
@@ -122,8 +125,11 @@ export class GraphService {
           }
         }
 
-        // Process incoming links
+        // Process incoming links (only resolved ones)
         for (const link of currentEntry.incomingLinks) {
+          // Skip unresolved links
+          if (!link.targetId || !link.resolved) continue;
+
           // Add edge
           const edgeExists = edges.some(
             (e) => e.sourceId === link.sourceId && e.targetId === link.targetId

apps/api/src/knowledge/services/link-resolution.service.ts

@@ -131,7 +131,9 @@ export class LinkResolutionService {
       return null;
     }
 
-    return fuzzyMatches[0].id;
+    // Return the single match
+    const match = fuzzyMatches[0];
+    return match ? match.id : null;
   }
 
   /**

apps/api/src/knowledge/services/link-sync.service.ts

@@ -1,7 +1,7 @@
 import { Injectable } from "@nestjs/common";
 import { PrismaService } from "../../prisma/prisma.service";
 import { LinkResolutionService } from "./link-resolution.service";
-import { parseWikiLinks, WikiLink } from "../utils/wiki-link-parser";
+import { parseWikiLinks } from "../utils/wiki-link-parser";
 
 /**
  * Represents a backlink to a knowledge entry

apps/web/src/app/(authenticated)/knowledge/[slug]/page.tsx

@@ -46,7 +46,7 @@ export default function EntryPage() {
         setEditContent(data.content);
         setEditStatus(data.status);
         setEditVisibility(data.visibility);
-        setEditTags(data.tags.map((tag) => tag.id));
+        setEditTags(data.tags.map((tag: { id: string }) => tag.id));
       } catch (err) {
         setError(err instanceof Error ? err.message : "Failed to load entry");
       } finally {
@@ -82,7 +82,7 @@ export default function EntryPage() {
       editStatus !== entry.status ||
       editVisibility !== entry.visibility ||
       JSON.stringify(editTags.sort()) !==
-        JSON.stringify(entry.tags.map((t) => t.id).sort());
+        JSON.stringify(entry.tags.map((t: { id: string }) => t.id).sort());
 
     setHasUnsavedChanges(changed);
   }, [entry, isEditing, editTitle, editContent, editStatus, editVisibility, editTags]);
@@ -158,7 +158,7 @@ export default function EntryPage() {
       setEditContent(entry.content);
       setEditStatus(entry.status);
       setEditVisibility(entry.visibility);
-      setEditTags(entry.tags.map((tag) => tag.id));
+      setEditTags(entry.tags.map((tag: { id: string }) => tag.id));
       setIsEditing(false);
       setHasUnsavedChanges(false);
     }
@@ -250,7 +250,7 @@ export default function EntryPage() {
               </span>
 
               {/* Tags */}
-              {entry.tags.map((tag) => (
+              {entry.tags.map((tag: { id: string; name: string; color: string | null }) => (
                 <span
                   key={tag.id}
                   className="px-3 py-1 rounded-full text-xs font-medium bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-300"

apps/web/src/app/(authenticated)/knowledge/page.tsx

@@ -40,7 +40,7 @@ export default function KnowledgePage() {
     // Filter by tag
     if (selectedTag !== "all") {
       filtered = filtered.filter((entry) =>
-        entry.tags.some((tag) => tag.slug === selectedTag)
+        entry.tags.some((tag: { slug: string }) => tag.slug === selectedTag)
       );
     }
 
@@ -51,7 +51,7 @@ export default function KnowledgePage() {
         (entry) =>
           entry.title.toLowerCase().includes(query) ||
           entry.summary?.toLowerCase().includes(query) ||
-          entry.tags.some((tag) => tag.name.toLowerCase().includes(query))
+          entry.tags.some((tag: { name: string }) => tag.name.toLowerCase().includes(query))
       );
     }
 

apps/web/src/components/knowledge/EntryCard.tsx

@@ -61,7 +61,7 @@ export function EntryCard({ entry }: EntryCardProps) {
           {/* Tags */}
           {entry.tags && entry.tags.length > 0 && (
             <div className="flex flex-wrap gap-1.5 mb-3">
-              {entry.tags.map((tag) => (
+              {entry.tags.map((tag: { id: string; name: string; color: string | null }) => (
                 <span
                   key={tag.id}
                   className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium"
@@ -79,10 +79,12 @@ export function EntryCard({ entry }: EntryCardProps) {
           {/* Metadata row */}
           <div className="flex flex-wrap items-center gap-3 text-xs text-gray-500">
             {/* Status */}
-            <span className={`inline-flex items-center gap-1 px-2 py-1 rounded-full ${statusInfo.className}`}>
-              <span>{statusInfo.icon}</span>
-              <span>{statusInfo.label}</span>
-            </span>
+            {statusInfo && (
+              <span className={`inline-flex items-center gap-1 px-2 py-1 rounded-full ${statusInfo.className}`}>
+                <span>{statusInfo.icon}</span>
+                <span>{statusInfo.label}</span>
+              </span>
+            )}
 
             {/* Visibility */}
             <span className="inline-flex items-center gap-1">