feat: service route branch handling, workspace hover card redesign, and agent form state improvements

- Add service-route-branch-handler for routing requests to branch-specific services
- Add service-hostname utility for generating hostnames from branch names
- Redesign workspace hover card with CI check status display
- Update combined model selector and sidebar workspace list
- Improve agent form state and input draft hooks
- Update checkout-git with enhanced branch handling
- Add workspace git watch and bootstrap improvements

packages/app/src/hooks/use-agent-form-state.test.ts

@@ -56,7 +56,7 @@ describe("useAgentFormState", () => {
       },
     ];
 
-    it("auto-selects the model's default thinking option when none is configured", () => {
+    it("does not auto-select a model on fresh drafts without preferences", () => {
       const resolved = __private__.resolveFormState(
         undefined,
         { provider: "codex" },
@@ -80,14 +80,14 @@ describe("useAgentFormState", () => {
         new Set<string>(),
       );
 
-      expect(resolved.model).toBe("gpt-5.3-codex");
-      expect(resolved.thinkingOptionId).toBe("xhigh");
+      expect(resolved.model).toBe("");
+      expect(resolved.thinkingOptionId).toBe("");
     });
 
-    it("prefers provider defaults on fresh drafts", () => {
+    it("auto-selects the model's default thinking option when model is preferred but thinking is not", () => {
       const resolved = __private__.resolveFormState(
         undefined,
-        { provider: "codex" },
+        { provider: "codex", providerPreferences: { codex: { model: "gpt-5.3-codex" } } },
         codexModels,
         {
           serverId: false,
@@ -115,7 +115,7 @@ describe("useAgentFormState", () => {
     it("falls back to model default when saved thinking preference is invalid", () => {
       const resolved = __private__.resolveFormState(
         undefined,
-        { provider: "codex" },
+        { provider: "codex", providerPreferences: { codex: { model: "gpt-5.3-codex" } } },
         codexModels,
         {
           serverId: false,
@@ -195,7 +195,7 @@ describe("useAgentFormState", () => {
 
     it("keeps an explicit initial thinking option when it is valid", () => {
       const resolved = __private__.resolveFormState(
-        { thinkingOptionId: "low" },
+        { model: "gpt-5.3-codex", thinkingOptionId: "low" },
         { provider: "codex" },
         codexModels,
         {
@@ -237,7 +237,7 @@ describe("useAgentFormState", () => {
 
       const resolved = __private__.resolveFormState(
         undefined,
-        { provider: "claude" },
+        { provider: "claude", providerPreferences: { claude: { model: "default" } } },
         claudeModels,
         {
           serverId: false,

packages/app/src/hooks/use-agent-form-state.ts

@@ -138,7 +138,7 @@ function resolveEffectiveModel(
   }
   const normalizedModelId = modelId.trim();
   if (!normalizedModelId) {
-    return resolveDefaultModel(availableModels);
+    return null;
   }
   return (
     availableModels.find((model) => model.id === normalizedModelId) ??
@@ -243,8 +243,6 @@ function resolveFormState(
       } else {
         result.model = defaultModelId;
       }
-    } else if (defaultModelId) {
-      result.model = defaultModelId;
     } else {
       result.model = "";
     }

packages/app/src/hooks/use-agent-input-draft.test.ts

@@ -112,13 +112,13 @@ describe("useAgentInputDraft", () => {
       ).toBe("gpt-5.4-mini");
     });
 
-    it("falls back to the provider default model", () => {
+    it("returns empty string when no model selected", () => {
       expect(
         __private__.resolveEffectiveComposerModelId({
           selectedModel: "",
           availableModels: models,
         }),
-      ).toBe("gpt-5.4");
+      ).toBe("");
     });
   });
 

packages/app/src/hooks/use-agent-input-draft.ts

@@ -88,12 +88,7 @@ function resolveEffectiveComposerModelId(input: {
   selectedModel: string;
   availableModels: AgentModelDefinition[];
 }): string {
-  const selectedModel = input.selectedModel.trim();
-  if (selectedModel) {
-    return selectedModel;
-  }
-
-  return input.availableModels.find((model) => model.isDefault)?.id ?? input.availableModels[0]?.id ?? "";
+  return input.selectedModel.trim();
 }
 
 function resolveEffectiveComposerThinkingOptionId(input: {