chore: Various improvements and CI setup

- Add Jenkinsfile for CI/CD pipeline
- Fix keyboard shortcut '?' handling for help dialog
- Update note form and connections components
- Add work mode toggle improvements
- Update navigation history and usage tracking
- Improve validators
- Add session summaries

src/lib/navigation-history.ts

@@ -13,7 +13,14 @@ export function getNavigationHistory(): NavigationEntry[] {
   try {
     const stored = localStorage.getItem(NAVIGATION_HISTORY_KEY)
     if (!stored) return []
-    return JSON.parse(stored)
+    const entries: NavigationEntry[] = JSON.parse(stored)
+    // Deduplicate by noteId, keeping the first occurrence (most recent)
+    const seen = new Set<string>()
+    return entries.filter(entry => {
+      if (seen.has(entry.noteId)) return false
+      seen.add(entry.noteId)
+      return true
+    })
   } catch {
     return []
   }

src/lib/usage.ts

@@ -176,12 +176,18 @@ export async function getCoUsedNotes(
         updatedAt: { gte: since },
       },
       orderBy: { weight: 'desc' },
-      take: limit,
+      take: limit * 2, // Fetch more to account for duplicates we'll filter
     })
 
+    // Deduplicate by relatedNoteId - only keep highest weight per note
+    const seenIds = new Set<string>()
     const result: { noteId: string; title: string; type: string; weight: number }[] = []
+
     for (const cu of coUsages) {
       const relatedNoteId = cu.fromNoteId === noteId ? cu.toNoteId : cu.fromNoteId
+      if (seenIds.has(relatedNoteId)) continue
+      seenIds.add(relatedNoteId)
+
       const note = await prisma.note.findUnique({
         where: { id: relatedNoteId },
         select: { id: true, title: true, type: true },
@@ -194,6 +200,7 @@ export async function getCoUsedNotes(
           weight: cu.weight,
         })
       }
+      if (result.length >= limit) break
     }
     return result
   } catch {

src/lib/validators.ts

@@ -4,8 +4,9 @@ export const NoteTypeEnum = z.enum(['command', 'snippet', 'decision', 'recipe',
 
 export const CreationSourceEnum = z.enum(['form', 'quick', 'import'])
 
-export const noteSchema = z.object({
-  id: z.string().optional(),
+// Base note schema without transform - for use with partial()
+const baseNoteSchema = z.object({
+  id: z.string().optional().nullable(),
   title: z.string().min(1, 'Title is required').max(200),
   content: z.string().min(1, 'Content is required'),
   type: NoteTypeEnum.default('note'),
@@ -15,10 +16,18 @@ export const noteSchema = z.object({
   creationSource: CreationSourceEnum.default('form'),
 })
 
-export const updateNoteSchema = noteSchema.partial().extend({
-  id: z.string(),
+// Transform to remove id if null/undefined (for creation)
+export const noteSchema = baseNoteSchema.transform(data => {
+  if (data.id == null) {
+    const { id, ...rest } = data
+    return rest
+  }
+  return data
 })
 
+// For update, use partial of base schema with optional id (id comes from URL path, not body)
+export const updateNoteSchema = baseNoteSchema.partial()
+
 export const searchSchema = z.object({
   q: z.string().optional(),
   type: NoteTypeEnum.optional(),