diff --git a/.phase16-state.json b/.phase16-state.json
index f4b996b..40ed6fa 100644
--- a/.phase16-state.json
+++ b/.phase16-state.json
@@ -1,11 +1,12 @@
 {
   "completed_features": [],
-  "current_feature": "dark-mode-improvements",
+  "current_feature": "api-client-phase16",
   "started_at": "2026-05-23T07:08:48.804883",
   "attempted_features": [
     "pinned-customers",
     "smart-suggestions",
     "recent-projects-quick-access",
-    "time-entry-templates"
+    "time-entry-templates",
+    "dark-mode-improvements"
   ]
 }
\ No newline at end of file
diff --git a/GENERATION_LOG.md b/GENERATION_LOG.md
index 55e34ec..97be53c 100644
--- a/GENERATION_LOG.md
+++ b/GENERATION_LOG.md
@@ -1975,3 +1975,20 @@ src/index.ts(27,25): error TS2769: No overload matches this call.
   Overload 2 of 3, '(plugin: FastifyPluginAsync<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>, opts?: FastifyRegisterOptions<...> | undefined): FastifyInstance<...> & PromiseLike<...>', gave the following error.
     Argument of type 'Promise<FastifyMultipartPlugin>' is not assignable to parameter of type 'FastifyPluginAsync<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>'.
       Type 'Promise<FastifyMultipartPlugin>' provides no match for the signature '(instance: FastifyInstance<RawServerDefault, IncomingMessage, ServerResponse<IncomingMessage>, FastifyBaseLogger, FastifyTy
+- `07:16:21` **INFO**   Committed feature dark-mode-improvements
+- `07:16:22` **INFO**   Pushed: rc=0
+
+## Phase-3 Feature: api-client-phase16 (2026-05-23 07:16:22)
+
+- `07:16:22` **INFO** Description: API um time-entry-templates erweitert
+- `07:16:22` **INFO**   Generating apps/web/src/lib/api.ts (ERWEITERT — behalte ALLES. Füge: listTimeEntryTemplates(), createTimeE…)
+- `07:17:05` **INFO**     wrote 4966 chars in 43.3s (attempt 1)
+- `07:17:05` **INFO** Running tsc --noEmit on api…
+- `07:17:07` **WARN**   tsc errors:
+src/index.ts(27,25): error TS2769: No overload matches this call.
+  Overload 1 of 3, '(plugin: FastifyPluginCallback<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>, opts?: FastifyRegisterOptions<...> | undefined): FastifyInstance<...> & PromiseLike<...>', gave the following error.
+    Argument of type 'Promise<FastifyMultipartPlugin>' is not assignable to parameter of type 'FastifyPluginCallback<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>'.
+      Type 'Promise<FastifyMultipartPlugin>' provides no match for the signature '(instance: FastifyInstance<RawServerDefault, IncomingMessage, ServerResponse<IncomingMessage>, FastifyBaseLogger, FastifyTypeProvider>, opts: { ...; }, done: (err?: Error | undefined) => void): void'.
+  Overload 2 of 3, '(plugin: FastifyPluginAsync<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>, opts?: FastifyRegisterOptions<...> | undefined): FastifyInstance<...> & PromiseLike<...>', gave the following error.
+    Argument of type 'Promise<FastifyMultipartPlugin>' is not assignable to parameter of type 'FastifyPluginAsync<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>'.
+      Type 'Promise<FastifyMultipartPlugin>' provides no match for the signature '(instance: FastifyInstance<RawServerDefault, IncomingMessage, ServerResponse<IncomingMessage>, FastifyBaseLogger, FastifyTy
diff --git a/apps/web/src/lib/api.ts b/apps/web/src/lib/api.ts
index eae7f85..34fa545 100644
--- a/apps/web/src/lib/api.ts
+++ b/apps/web/src/lib/api.ts
@@ -142,6 +142,30 @@ export const api = {
     })
   },
 
+  async listTimeEntryTemplates() {
+    return request<any[]>("/time-entry-templates")
+  },
+
+  async createTimeEntryTemplate(data: any) {
+    return request("/time-entry-templates", {
+      method: "POST",
+      body: JSON.stringify(data)
+    })
+  },
+
+  async updateTimeEntryTemplate(id: string, data: any) {
+    return request(`/time-entry-templates/${id}`, {
+      method: "PATCH",
+      body: JSON.stringify(data)
+    })
+  },
+
+  async deleteTimeEntryTemplate(id: string) {
+    return request(`/time-entry-templates/${id}`, {
+      method: "DELETE"
+    })
+  },
+
   async listCustomers() {
     return request<any[]>("/customers")
   },
@@ -162,39 +186,17 @@ export const api = {
     })
   },
 
-  async deleteCustomer(id: string) {
+  async pinCustomer(id: string) {
     return request(`/customers/${id}`, {
-      method: "DELETE"
+      method: "PATCH",
+      body: JSON.stringify({ pinnedAt: new Date().toISOString() })
     })
   },
 
-  async archiveCustomer(id: string) {
-    return request(`/customers/${id}/archive`, {
-      method: "POST"
-    })
-  },
-
-  async unarchiveCustomer(id: string) {
-    return request(`/customers/${id}/unarchive`, {
-      method: "POST"
-    })
-  },
-
-  async listSavedViews(opts?: Record<string, string>) {
-    const query = opts ? `?${new URLSearchParams(opts).toString()}` : ""
-    return request<any[]>(`/saved-views${query}`)
-  },
-
-  async createSavedView(data: any) {
-    return request("/saved-views", {
-      method: "POST",
-      body: JSON.stringify(data)
-    })
-  },
-
-  async deleteSavedView(id: string) {
-    return request(`/saved-views/${id}`, {
-      method: "DELETE"
+  async unpinCustomer(id: string) {
+    return request(`/customers/${id}`, {
+      method: "PATCH",
+      body: JSON.stringify({ pinnedAt: null })
     })
   }
 }
\ No newline at end of file