feat(app): color filetree change dots by diff kind

packages/app/src/components/file-tree.tsx

@@ -17,6 +17,8 @@ import {
 import { Dynamic } from "solid-js/web"
 import type { FileNode } from "@opencode-ai/sdk/v2"
 
+type Kind = "add" | "del" | "mix"
+
 type Filter = {
   files: Set<string>
   dirs: Set<string>
@@ -29,6 +31,7 @@ export default function FileTree(props: {
   level?: number
   allowed?: readonly string[]
   modified?: readonly string[]
+  kinds?: ReadonlyMap<string, Kind>
   draggable?: boolean
   tooltip?: boolean
   onFileClick?: (file: FileNode) => void
@@ -36,6 +39,7 @@ export default function FileTree(props: {
   _filter?: Filter
   _marks?: Set<string>
   _deeps?: Map<string, number>
+  _kinds?: ReadonlyMap<string, Kind>
 }) {
   const file = useFile()
   const level = props.level ?? 0
@@ -66,11 +70,16 @@ export default function FileTree(props: {
   const marks = createMemo(() => {
     if (props._marks) return props._marks
 
-    const modified = props.modified
+    const modified = props.modified ?? (props.kinds ? Array.from(props.kinds.keys()) : undefined)
     if (!modified || modified.length === 0) return
     return new Set(modified)
   })
 
+  const kinds = createMemo(() => {
+    if (props._kinds) return props._kinds
+    return props.kinds
+  })
+
   const deeps = createMemo(() => {
     if (props._deeps) return props._deeps
 
@@ -179,9 +188,27 @@ export default function FileTree(props: {
         >
           {local.node.name}
         </span>
-        {local.node.type === "file" && marks()?.has(local.node.path) ? (
-          <div class="shrink-0 size-1.5 rounded-full bg-surface-warning-strong" />
-        ) : null}
+        {(() => {
+          if (local.node.type !== "file") return null
+          if (!marks()?.has(local.node.path)) return null
+
+          const kind = kinds()?.get(local.node.path)
+          return (
+            <div
+              classList={{
+                "shrink-0 size-1.5 rounded-full": true,
+                "bg-surface-warning-strong": !kind || kind === "mix",
+              }}
+              style={
+                kind === "add"
+                  ? "background-color: var(--icon-diff-add-base)"
+                  : kind === "del"
+                    ? "background-color: var(--icon-diff-delete-base)"
+                    : undefined
+              }
+            />
+          )
+        })()}
       </Dynamic>
     )
   }
@@ -235,12 +262,14 @@ export default function FileTree(props: {
                       level={level + 1}
                       allowed={props.allowed}
                       modified={props.modified}
+                      kinds={props.kinds}
                       draggable={props.draggable}
                       tooltip={props.tooltip}
                       onFileClick={props.onFileClick}
                       _filter={filter()}
                       _marks={marks()}
                       _deeps={deeps()}
+                      _kinds={kinds()}
                     />
                   </Collapsible.Content>
                 </Collapsible>

packages/app/src/pages/session.tsx

@@ -479,6 +479,16 @@ export default function Page() {
     scrollToMessage(msgs[targetIndex], "auto")
   }
 
+  const kinds = createMemo(() => {
+    const out = new Map<string, "add" | "del" | "mix">()
+    for (const diff of diffs()) {
+      const add = diff.additions > 0
+      const del = diff.deletions > 0
+      const kind = add && del ? "mix" : add ? "add" : del ? "del" : "mix"
+      out.set(diff.file, kind)
+    }
+    return out
+  })
   const emptyDiffFiles: string[] = []
   const diffFiles = createMemo(() => diffs().map((d) => d.file), emptyDiffFiles, { equals: same })
   const diffsReady = createMemo(() => {
@@ -2652,6 +2662,7 @@ export default function Page() {
                             <FileTree
                               path=""
                               allowed={diffFiles()}
+                              kinds={kinds()}
                               draggable={false}
                               tooltip={false}
                               onFileClick={(node) => focusReviewDiff(node.path)}
@@ -2669,6 +2680,7 @@ export default function Page() {
                       <FileTree
                         path=""
                         modified={diffFiles()}
+                        kinds={kinds()}
                         tooltip={false}
                         onFileClick={(node) => openTab(file.tab(node.path))}
                       />