Add Ollama and LiteLLM backend support (v0.2.0)

Add two new auth modes for projects alongside Anthropic and Bedrock:
- Ollama: connect to local or remote Ollama servers via ANTHROPIC_BASE_URL
- LiteLLM: connect through a LiteLLM proxy gateway to 100+ model providers

Both modes inject ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN env vars into
the container, with optional model override via ANTHROPIC_MODEL. LiteLLM
API keys are stored securely in the OS keychain. Config changes trigger
automatic container recreation via fingerprinting.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src-tauri/src/commands/project_commands.rs

@@ -34,6 +34,11 @@ fn store_secrets_for_project(project: &Project) -> Result<(), String> {
             secure::store_project_secret(&project.id, "aws-bearer-token", v)?;
         }
     }
+    if let Some(ref litellm) = project.litellm_config {
+        if let Some(ref v) = litellm.api_key {
+            secure::store_project_secret(&project.id, "litellm-api-key", v)?;
+        }
+    }
     Ok(())
 }
 
@@ -51,6 +56,10 @@ fn load_secrets_for_project(project: &mut Project) {
         bedrock.aws_bearer_token = secure::get_project_secret(&project.id, "aws-bearer-token")
             .unwrap_or(None);
     }
+    if let Some(ref mut litellm) = project.litellm_config {
+        litellm.api_key = secure::get_project_secret(&project.id, "litellm-api-key")
+            .unwrap_or(None);
+    }
 }
 
 /// Resolve enabled MCP servers and filter to Docker-only ones.
@@ -180,6 +189,22 @@ pub async fn start_project_container(
         }
     }
 
+    if project.auth_mode == AuthMode::Ollama {
+        let ollama = project.ollama_config.as_ref()
+            .ok_or_else(|| "Ollama auth mode selected but no Ollama configuration found.".to_string())?;
+        if ollama.base_url.is_empty() {
+            return Err("Ollama base URL is required.".to_string());
+        }
+    }
+
+    if project.auth_mode == AuthMode::LiteLlm {
+        let litellm = project.litellm_config.as_ref()
+            .ok_or_else(|| "LiteLLM auth mode selected but no LiteLLM configuration found.".to_string())?;
+        if litellm.base_url.is_empty() {
+            return Err("LiteLLM base URL is required.".to_string());
+        }
+    }
+
     // Update status to starting
     state.projects_store.update_status(&project_id, ProjectStatus::Starting)?;