Refactor: Infrastructure cleanup, shared components, and theme synchronization

changelogs/v2.3.6.md

@@ -0,0 +1,16 @@
+## What's new
+
+A maintenance release focused on internal cleanup: shared hooks and components were extracted across the app to remove duplicated logic and shrink several oversized files. No new features, but it fixes a few UI consistency issues along the way.
+
+### Fixes
+
+- **Code, diff, and git views now recolour instantly on theme change**: Syntax-highlighted code blocks, the diff viewer, and the git panel read the theme once when they rendered and didn't update when you switched light/dark (or when the OS theme changed in "system" mode) — leaving stale colours until the view remounted. They now repaint immediately on a theme change.
+- **More reliable navigation from links and chips**: Opening a note or task from a card's linked-notes list, a chat/agent reference chip, a flow node, the search panel, or the project overview occasionally raced the target view's load and failed to scroll to / select the item. These now consistently switch views and reveal the target.
+- **Consistent syntax-highlight colours everywhere**: Code blocks in notes, the dashboard HTML editor, and PDF export all draw from a single shared palette, so a given token renders the same colour across every surface (and the PDF light-theme remap stays in sync).
+
+### Changes
+
+- **Medium-priority colour aligned to blue**: The medium priority level now renders blue (`--info`) consistently. Previously the class-based badges (flow task nodes, the node-edit modal, the top-bar project badge, the card-detail flag) showed amber while the board card stripes and analytics charts already used blue. They now all match.
+- **Shared UI primitives**: Introduced reusable building blocks — a theme hook (`useIsDark`), a copy-to-clipboard hook, a navigation helper, a `Toggle` switch, and a node-type chip — and adopted them across chat, agent, notes, kanban, graph, insights, settings, and onboarding to replace ad-hoc copies.
+- **Unified the card detail view**: The card-detail modal and the inline card-detail panel (shown beside chat) now share one implementation, so they always stay in sync.
+- **Smaller, more focused modules**: The kanban board's archive view, the note PDF-export logic, and the shared markdown code-block renderer were split into their own files; the store's startup hydration paths now share a single restore routine. The agent chat pane's turn-complete and error handlers now share one transcript-save routine, and the session-list date formatter moved into the shared date helpers.

src/components/agent/AgentChatPane.tsx

@@ -20,7 +20,7 @@ import { AgentMessageBubble } from "./AgentMessageBubble";
 import { PlanTaskList } from "./PlanTaskList";
 import { ContextRing } from "./ContextRing";
 import { Tooltip } from "@/components/ui/tooltip";
-import { CairnEvents } from "@/lib/events";
+import { revealNote } from "@/lib/events";
 import { resolvePromptContext } from "@/lib/context-resolver";
 import type { TerminalSession, TokenBreakdown } from "@/types";
 
@@ -60,6 +60,26 @@ function extractCairnRef(
   }
 }
 
+/**
+ * Persist the session's finalised message transcript to the backend. Reads the
+ * latest store state imperatively (so it is safe to call from IPC callbacks),
+ * drops still-streaming messages, and fire-and-forgets the save. Shared by the
+ * `onDone` and `onError` handlers, which previously inlined identical blocks.
+ */
+function persistPiTranscript(sessionId: string): void {
+  const msgs = useCairnStore.getState().terminalSessions.find((t) => t.sessionId === sessionId)?.piMessages ?? [];
+  const saveable = msgs.filter((m) => !m.isStreaming).map((m) => ({
+    id: m.id,
+    role: m.role,
+    content: m.content,
+    reasoning: m.reasoning ?? null,
+    toolCalls: m.toolCalls ?? null,
+    subagents: m.subagents ?? null,
+    timestamp: m.timestamp,
+  }));
+  window.electron?.piAgent.saveMessages(sessionId, saveable).catch(console.error);
+}
+
 
 const NATIVE_AGENT_SLASH_COMMANDS = [
   {
@@ -248,17 +268,7 @@ export function AgentChatPane({ session, isActive }: AgentChatPaneProps) {
       setRetryInfo(null);
       setIsCompacting(false);
       // Persist the full message transcript after the turn completes
-      const msgs = useCairnStore.getState().terminalSessions.find((t) => t.sessionId === sessionId)?.piMessages ?? [];
-      const saveable = msgs.filter((m) => !m.isStreaming).map((m) => ({
-        id: m.id,
-        role: m.role,
-        content: m.content,
-        reasoning: m.reasoning ?? null,
-        toolCalls: m.toolCalls ?? null,
-        subagents: m.subagents ?? null,
-        timestamp: m.timestamp,
-      }));
-      window.electron?.piAgent.saveMessages(sessionId, saveable).catch(console.error);
+      persistPiTranscript(sessionId);
     });
 
     const unsubError = electron.piAgent.onError((e) => {
@@ -274,19 +284,7 @@ export function AgentChatPane({ session, isActive }: AgentChatPaneProps) {
       });
       setIsLoading(false);
       // Persist the message transcript including the error message
-      setTimeout(() => {
-        const msgs = useCairnStore.getState().terminalSessions.find((t) => t.sessionId === sessionId)?.piMessages ?? [];
-        const saveable = msgs.filter((m) => !m.isStreaming).map((m) => ({
-          id: m.id,
-          role: m.role,
-          content: m.content,
-          reasoning: m.reasoning ?? null,
-          toolCalls: m.toolCalls ?? null,
-          subagents: m.subagents ?? null,
-          timestamp: m.timestamp,
-        }));
-        window.electron?.piAgent.saveMessages(sessionId, saveable).catch(console.error);
-      }, 0);
+      setTimeout(() => persistPiTranscript(sessionId), 0);
     });
 
     // ── Subagent events (child session IDs routed back to parent) ──────────
@@ -596,10 +594,7 @@ export function AgentChatPane({ session, isActive }: AgentChatPaneProps) {
         {session.planNoteId && (
           <Tooltip content="Open plan note" side="left">
             <button
-              onClick={() => {
-                setView("notes");
-                setTimeout(() => window.dispatchEvent(CairnEvents.selectNote(session.planNoteId!)), 50);
-              }}
+              onClick={() => revealNote(setView, session.planNoteId!)}
               className="flex items-center gap-1 text-[0.643rem] text-[var(--text-secondary)] hover:text-[var(--text-primary)] px-1.5 py-0.5 rounded-full border border-[var(--border)] hover:bg-[var(--surface-2)] transition-colors"
             >
               <FileText size={9} />

src/components/agent/AgentEditor.tsx

@@ -13,6 +13,7 @@
 import { useState, useCallback } from "react";
 import { X, Save, FileCode, Eye, ImageIcon } from "lucide-react";
 import { cn } from "@/lib/utils";
+import { useIsDark } from "@/hooks/useIsDark";
 import { useCairnStore } from "@/store";
 import { useShallow } from "zustand/react/shallow";
 import { NoteMarkdownPreview } from "@/components/notes/NoteMarkdownPreview";
@@ -41,10 +42,7 @@ export function AgentEditor() {
   // Preview content cache: path → content string
   const [previewContent, setPreviewContent] = useState<Record<string, string>>({});
 
-  const isDark =
-    typeof document !== "undefined"
-      ? document.documentElement.getAttribute("data-theme") !== "light"
-      : true;
+  const isDark = useIsDark();
 
   const handleDirtyChange = useCallback((path: string, dirty: boolean) => {
     setDirtyFiles((prev) => {

src/components/agent/AgentEmptyState.tsx

@@ -3,9 +3,8 @@
 import { useShallow } from "zustand/react/shallow";
 import { Plus, Bot, History, ArrowRight } from "lucide-react";
 import { useCairnStore } from "@/store";
-import { cn } from "@/lib/utils";
+import { cn, formatDateCompact } from "@/lib/utils";
 import { useAgentSessionActions } from "./useAgentSessionActions";
-import { formatDate } from "./sessionUtils";
 
 export function AgentEmptyState() {
   const { piSessionHistory, persistentPiSessionId } = useCairnStore(useShallow((s) => ({
@@ -58,7 +57,7 @@ export function AgentEmptyState() {
             >
               <div className="flex-1 min-w-0">
                 <p className="text-[0.714rem] text-[var(--text-secondary)] truncate">{summary.taskTitle}</p>
-                <p className="text-[0.607rem] text-[var(--text-tertiary)]">{formatDate(summary.updatedAt)}</p>
+                <p className="text-[0.607rem] text-[var(--text-tertiary)]">{formatDateCompact(summary.updatedAt)}</p>
               </div>
               <ArrowRight size={10} className="text-[var(--text-tertiary)] shrink-0 opacity-0 group-hover:opacity-100" />
             </button>

src/components/agent/AgentMessageBubble.tsx

@@ -253,7 +253,7 @@ export const AgentMessageBubble = React.memo(function AgentMessageBubble({ messa
     return (
       <div className="flex gap-2 items-start justify-end">
         <div className="flex-1 min-w-0 flex flex-col items-end gap-1">
-          <div className="px-3 py-2 rounded-xl rounded-tr-sm text-xs leading-relaxed bg-[var(--accent)] text-[var(--accent-fg)] max-w-[85%]">
+          <div className="px-3 py-2 rounded-xl rounded-tr-sm text-xs leading-relaxed bg-[var(--accent)] text-white max-w-[85%]">
             <MarkdownContent content={message.content} isUser />
           </div>
         </div>

src/components/agent/AgentSessionTab.tsx

@@ -4,9 +4,8 @@ import { useEffect, useRef, useState } from "react";
 import { useShallow } from "zustand/react/shallow";
 import { ChevronDown, History, MessageSquare, Trash2 } from "lucide-react";
 import { useCairnStore } from "@/store";
-import { cn } from "@/lib/utils";
+import { cn, formatDateCompact } from "@/lib/utils";
 import { useAgentSessionActions } from "./useAgentSessionActions";
-import { formatDate } from "./sessionUtils";
 import type { PiSessionSummary } from "@/types";
 
 interface AgentSessionTabProps {
@@ -123,7 +122,7 @@ export function AgentSessionTab({ isActive, onActivate }: AgentSessionTabProps)
                       )}>
                         {summary.mode.toUpperCase()}
                       </span>
-                      <span className="text-[0.607rem] text-[var(--text-tertiary)]">{formatDate(summary.updatedAt)}</span>
+                      <span className="text-[0.607rem] text-[var(--text-tertiary)]">{formatDateCompact(summary.updatedAt)}</span>
                       {summary.status === "exited" && (
                         <span className="text-[0.607rem] text-[var(--text-tertiary)]">· exited</span>
                       )}

src/components/agent/DiffViewer.tsx

@@ -15,6 +15,8 @@ import { useMemo, useState, useEffect, useCallback, useRef, useDeferredValue } f
 import parseDiff from "parse-diff";
 import { Copy, Check, RefreshCw, FolderGit2, ChevronRight, ChevronDown } from "lucide-react";
 import { cn } from "@/lib/utils";
+import { useIsDark } from "@/hooks/useIsDark";
+import { useCopyToClipboard } from "@/hooks/useCopyToClipboard";
 import { Tooltip } from "@/components/ui/tooltip";
 import { FileDiff, PALETTE_DARK, PALETTE_LIGHT } from "./DiffFile";
 import type { ViewMode } from "./DiffFile";
@@ -43,17 +45,14 @@ interface DiffViewerProps {
 }
 
 export function DiffViewer({ cwd }: DiffViewerProps) {
-  const isDark =
-    typeof document !== "undefined"
-      ? document.documentElement.getAttribute("data-theme") !== "light"
-      : true;
+  const isDark = useIsDark();
   const palette = isDark ? PALETTE_DARK : PALETTE_LIGHT;
 
   const [diffText, setDiffText] = useState("");
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
   const [lastRefresh, setLastRefresh] = useState<Date | null>(null);
-  const [copied, setCopied] = useState(false);
+  const { copied, copy } = useCopyToClipboard();
   const [mode, setMode] = useState<ViewMode>("unified");
   const [collapsed, setCollapsed] = useState<Set<string>>(new Set());
   const isMounted = useRef(true);
@@ -106,11 +105,8 @@ export function DiffViewer({ cwd }: DiffViewerProps) {
   const expandAll = useCallback(() => setCollapsed(new Set()), []);
 
   const handleCopy = useCallback(() => {
-    navigator.clipboard.writeText(diffText).then(() => {
-      setCopied(true);
-      setTimeout(() => setCopied(false), 2000);
-    });
-  }, [diffText]);
+    copy(diffText);
+  }, [diffText, copy]);
 
   // ── Toolbar ────────────────────────────────────────────────────────────────
   const toolbar = (

src/components/agent/GitView.tsx

@@ -3,6 +3,7 @@
 import { useState, useEffect, useCallback, useRef, useMemo } from "react";
 import { RefreshCw, GitBranch, GitCommit, ArrowUp, Sparkles, File, Check, X, ChevronRight, ChevronDown, GitPullRequest, RotateCcw } from "lucide-react";
 import { cn } from "@/lib/utils";
+import { useIsDark } from "@/hooks/useIsDark";
 import { useCairnStore } from "@/store";
 import { useShallow } from "zustand/react/shallow";
 import { Button } from "@/components/ui/button";
@@ -1059,10 +1060,7 @@ function FileRow({
 }
 
 function Inlinediff({ rawDiff, loading }: { rawDiff: string; loading: boolean }) {
-  const isDark =
-    typeof document !== "undefined"
-      ? document.documentElement.getAttribute("data-theme") !== "light"
-      : true;
+  const isDark = useIsDark();
   const palette = isDark ? PALETTE_DARK : PALETTE_LIGHT;
 
   const parsed = useMemo(() => {

src/components/chat/PreviewPane.tsx

@@ -6,7 +6,7 @@ import { useCairnStore } from "@/store";
 import { useShallow } from "zustand/react/shallow";
 import { NoteEditor } from "@/components/notes/note-editor";
 import { CardDetailPanel } from "@/components/kanban/card-detail-panel";
-import { CairnEvents } from "@/lib/events";
+import { revealNote, revealCard } from "@/lib/events";
 import { Button } from "@/components/ui/button";
 
 const MIN_PREVIEW_WIDTH = 360;
@@ -79,11 +79,9 @@ export function PreviewPane() {
 
   function handleGoToSection() {
     if (type === "note" && note) {
-      setView("notes");
-      setTimeout(() => window.dispatchEvent(CairnEvents.selectNote(note.id)), 50);
+      revealNote(setView, note.id);
     } else if (type === "task" && card) {
-      setView("board");
-      setTimeout(() => window.dispatchEvent(CairnEvents.openCard(card.id)), 50);
+      revealCard(setView, card.id);
     }
     setActivePreviewItem(null);
   }

src/components/chat/chat-panel/ChatMessageBubble.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import React, { useState } from "react";
+import { useCopyToClipboard } from "@/hooks/useCopyToClipboard";
 import { FileText, Kanban, FolderOpen, Search, Copy, Check, RotateCcw, CheckCircle } from "lucide-react";
 import { cn, formatRelative, prettifyToolLabel } from "@/lib/utils";
 import { MarkdownContent } from "./MarkdownContent";
@@ -31,13 +32,10 @@
 export const ChatMessageBubble = React.memo(function ChatMessageBubble({ message, onRetry }: ChatMessageBubbleProps) {
   const isUser = message.role === "user";
   const isSystem = message.role === "system";
-  const [copied, setCopied] = useState(false);
+  const { copied, copy } = useCopyToClipboard();
 
   function handleCopy() {
-    navigator.clipboard.writeText(message.content).then(() => {
-      setCopied(true);
-      setTimeout(() => setCopied(false), 2000);
-    });
+    copy(message.content);
   }
 
   if (isSystem) {