fix: pin Biome to exact version, normalize jsdom to caret range

Addresses PR review feedback:
- Biome: revert ^2.5.4 to exact 2.5.4 (linters should be pinned)
- jsdom: 29 → ^29.0.0 for consistency with other deps

Ref #800

bun.lock

@@ -9,12 +9,12 @@
         "@mozilla/readability": "^0.6.0",
         "@opencode-ai/plugin": "^1.3.17",
         "@opencode-ai/sdk": "^1.3.17",
-        "jsdom": "29",
+        "jsdom": "^29.0.0",
         "lru-cache": "^11.5.2",
         "turndown": "^7.2.4",
       },
       "devDependencies": {
-        "@biomejs/biome": "^2.5.4",
+        "@biomejs/biome": "2.5.4",
         "@types/jsdom": "28",
         "@types/node": "^26.1.1",
         "@types/turndown": "^5.0.6",

package.json

@@ -82,7 +82,7 @@
     "@mozilla/readability": "^0.6.0",
     "@opencode-ai/plugin": "^1.3.17",
     "@opencode-ai/sdk": "^1.3.17",
-    "jsdom": "29",
+    "jsdom": "^29.0.0",
     "lru-cache": "^11.5.2",
     "turndown": "^7.2.4"
   },
@@ -90,7 +90,7 @@
     "@opentui/solid": "^0.1.97"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.5.4",
+    "@biomejs/biome": "2.5.4",
     "@types/jsdom": "28",
     "@types/node": "^26.1.1",
     "@types/turndown": "^5.0.6",