fix(client): declare browser-only externals as devDependencies

react, react-dom, shiki, katex, clsx, the micromark and mdast families and nine
more reach only browser artifacts, which resolve nothing on a user's machine.
Moving 79 declarations out of dependencies and non-optional peerDependencies
drops 103 tarballs and 6.05 MB from an install of the published CLI.

packages/session-query/session-log-export/package.json

@@ -2,7 +2,9 @@
   "name": "@deepseek-ai/dsh-session-log-export",
   "description": "Web Session-log export command and shared download dialog",
   "version": "0.1.0-rc.6",
-  "publishConfig": { "access": "public" },
+  "publishConfig": {
+    "access": "public"
+  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/deepseek-ai/deepseek-harness.git",
@@ -12,14 +14,31 @@
   "main": "lib/index.js",
   "types": "lib/types/index.d.ts",
   "exports": {
-    ".": { "types": "./lib/types/index.d.ts", "default": "./lib/index.js" },
-    "./invariant": { "types": "./lib/types/invariant.d.ts", "default": "./lib/invariant.js" },
-    "./client": { "types": "./lib/types/client/index.d.ts", "default": "./lib/client.js" },
+    ".": {
+      "types": "./lib/types/index.d.ts",
+      "default": "./lib/index.js"
+    },
+    "./invariant": {
+      "types": "./lib/types/invariant.d.ts",
+      "default": "./lib/invariant.js"
+    },
+    "./client": {
+      "types": "./lib/types/client/index.d.ts",
+      "default": "./lib/client.js"
+    },
     "./src/*": "./src/*",
     "./package.json": "./package.json"
   },
-  "files": ["lib/index.js", "lib/invariant.js", "lib/client.js", "lib/types/**/*.d.ts"],
-  "scripts": { "bundle": "tsdown", "watch": "tsdown --watch" },
+  "files": [
+    "lib/index.js",
+    "lib/invariant.js",
+    "lib/client.js",
+    "lib/types/**/*.d.ts"
+  ],
+  "scripts": {
+    "bundle": "tsdown",
+    "watch": "tsdown --watch"
+  },
   "license": "MIT",
   "peerDependencies": {
     "@deepseek-ai/cordis": "workspace:^",
@@ -30,8 +49,7 @@
     "@deepseek-ai/dsh-client-ui-primitives": "workspace:^",
     "@deepseek-ai/dsh-client-ui-slots": "workspace:^",
     "@deepseek-ai/dsh-commands": "workspace:^",
-    "@deepseek-ai/dsh-invariants": "workspace:^",
-    "react": "^18.2.0"
+    "@deepseek-ai/dsh-invariants": "workspace:^"
   },
   "devDependencies": {
     "@deepseek-ai/cordis": "workspace:^",