added claude api login page

streamlit-client/app.py

@@ -334,6 +334,8 @@ def save_chat_history(messages: list, workflow_type: str, metadata: dict = None)
 
 if "api_key" not in st.session_state:
     st.session_state.api_key = os.getenv("GEMINI_API_KEY") or os.getenv("OPENAI_API_KEY") or ""
+if "anthropic_api_key" not in st.session_state:
+    st.session_state.anthropic_api_key = os.getenv("ANTHROPIC_API_KEY") or ""
 if "default_model" not in st.session_state:
     st.session_state.default_model = os.getenv(
         "SCIEVO_DEFAULT_MODEL", "gemini/gemini-2.5-flash-lite"
@@ -342,8 +344,9 @@ if "default_model" not in st.session_state:
 if not st.session_state.api_key:
     st.title("SciEvo Research Assistant")
     st.warning("API Key Required")
-    st.markdown("Please provide an API key to use the SciEvo Research Assistant.")
+    st.markdown("Please provide API keys to use the SciEvo Research Assistant.")
 
+    # Model provider selection
     col1, col2 = st.columns(2)
     with col1:
         model_option = st.selectbox(
@@ -354,19 +357,39 @@ if not st.session_state.api_key:
 
     with col2:
         api_key_input = st.text_input(
-            "API Key", type="password", placeholder="Enter your API key here", value=""
+            f"{model_option} API Key",
+            type="password",
+            placeholder=f"Enter your {model_option} API key here",
+            value="",
+            help=f"Required for {model_option} models used in data analysis and ideation",
         )
 
-    if st.button("Save API Key", type="primary"):
+    # Claude API Key input (separate, always shown)
+    st.divider()
+    anthropic_api_key_input = st.text_input(
+        "Anthropic (Claude) API Key",
+        type="password",
+        placeholder="Enter your Anthropic API key here (optional but recommended)",
+        value=st.session_state.anthropic_api_key,
+        help="Required for Claude Agent SDK (coding agent v3). Used for code generation tasks.",
+    )
+
+    if st.button("Save API Keys", type="primary"):
         if api_key_input:
             st.session_state.api_key = api_key_input
             if model_option == "Gemini":
                 st.session_state.default_model = "gemini/gemini-2.5-flash-lite"
             else:
                 st.session_state.default_model = "gpt-4o-mini"
+
+            # Save Anthropic API key if provided
+            if anthropic_api_key_input:
+                st.session_state.anthropic_api_key = anthropic_api_key_input
+                os.environ["ANTHROPIC_API_KEY"] = anthropic_api_key_input
+
             st.rerun()
         else:
-            st.error("Please enter a valid API key")
+            st.error("Please enter a valid API key for the selected model provider")
     st.stop()
 
 col_title, col_reset = st.columns([5, 1])
@@ -383,6 +406,7 @@ with col_reset:
         ]
         if "selected_workflow" in st.session_state:
             st.session_state.selected_workflow = None
+        # Note: API keys are preserved on reset (user doesn't need to re-enter them)
         st.rerun()
 
 if "initialized" not in st.session_state:
@@ -403,10 +427,16 @@ if "initialized" not in st.session_state:
 
     # Ensure ANTHROPIC_API_KEY is available for Claude Agent SDK
     if not os.getenv("ANTHROPIC_API_KEY"):
-        # Try to get from user's API key if it's an Anthropic key
-        user_key = st.session_state.get("api_key", "")
-        if user_key and ("anthropic" in user_key.lower() or user_key.startswith("sk-ant-")):
-            os.environ["ANTHROPIC_API_KEY"] = user_key
+        # First try to get from session state (user input)
+        anthropic_key = st.session_state.get("anthropic_api_key", "")
+        if anthropic_key:
+            os.environ["ANTHROPIC_API_KEY"] = anthropic_key
+        else:
+            # Fallback: try to get from user's main API key if it's an Anthropic key
+            user_key = st.session_state.get("api_key", "")
+            if user_key and ("anthropic" in user_key.lower() or user_key.startswith("sk-ant-")):
+                os.environ["ANTHROPIC_API_KEY"] = user_key
+                st.session_state.anthropic_api_key = user_key
 
     if not os.getenv("BRAIN_DIR"):
         os.environ["BRAIN_DIR"] = str(Path.cwd() / "tmp_brain")