feat: structured artifact rendering, UX improvements

- Render structured artifacts from agent results with type-aware
  formatting: code blocks with syntax highlighting and copy button,
  terminal-style command output, search result cards, and text findings
- Make FinalResult panel collapsible (default collapsed) with scrollable
  content (max-h-96) to prevent dominating the chat view
- Add clickable URL detection in summaries and artifact content
- Fix code block contrast for both light and dark mode
- Animate progress bar with pulse ring on active step and gradient
  shimmer on connecting lines
- Fix tab-switching bug: use module-level orchestrationStore singleton
  so orchestration state survives route navigation
- Remove sample/demo data seeding and clean up persisted localStorage
  entries from previous sample sessions
- Remove showSampleBadge prop from PageHeader
- Regenerate proto types for new Artifact message and ArtifactType enum
- Update README project structure (remove deleted data/ directory)

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

src/lib/proto/llm_multiverse/v1/common_pb.ts

@@ -12,7 +12,47 @@ import type { Message } from "@bufbuild/protobuf";
  * Describes the file llm_multiverse/v1/common.proto.
  */
 export const file_llm_multiverse_v1_common: GenFile = /*@__PURE__*/
-  fileDesc("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", [file_google_protobuf_timestamp]);
+  fileDesc("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", [file_google_protobuf_timestamp]);
+
+/**
+ * A concrete output produced by an agent (code, command output, etc.).
+ *
+ * @generated from message llm_multiverse.v1.Artifact
+ */
+export type Artifact = Message<"llm_multiverse.v1.Artifact"> & {
+  /**
+   * Display name (filename, query, etc.)
+   *
+   * @generated from field: string label = 1;
+   */
+  label: string;
+
+  /**
+   * Full content
+   *
+   * @generated from field: string content = 2;
+   */
+  content: string;
+
+  /**
+   * @generated from field: llm_multiverse.v1.ArtifactType artifact_type = 3;
+   */
+  artifactType: ArtifactType;
+
+  /**
+   * language, path, tool_name, exit_code, etc.
+   *
+   * @generated from field: map<string, string> metadata = 4;
+   */
+  metadata: { [key: string]: string };
+};
+
+/**
+ * Describes the message llm_multiverse.v1.Artifact.
+ * Use `create(ArtifactSchema)` to create a new message.
+ */
+export const ArtifactSchema: GenMessage<Artifact> = /*@__PURE__*/
+  messageDesc(file_llm_multiverse_v1_common, 0);
 
 /**
  * Identifies a single agent in the lineage chain.
@@ -41,7 +81,7 @@ export type AgentIdentifier = Message<"llm_multiverse.v1.AgentIdentifier"> & {
  * Use `create(AgentIdentifierSchema)` to create a new message.
  */
 export const AgentIdentifierSchema: GenMessage<AgentIdentifier> = /*@__PURE__*/
-  messageDesc(file_llm_multiverse_v1_common, 0);
+  messageDesc(file_llm_multiverse_v1_common, 1);
 
 /**
  * Ordered chain of agents from orchestrator (index 0) to current agent.
@@ -61,7 +101,7 @@ export type AgentLineage = Message<"llm_multiverse.v1.AgentLineage"> & {
  * Use `create(AgentLineageSchema)` to create a new message.
  */
 export const AgentLineageSchema: GenMessage<AgentLineage> = /*@__PURE__*/
-  messageDesc(file_llm_multiverse_v1_common, 1);
+  messageDesc(file_llm_multiverse_v1_common, 2);
 
 /**
  * Carried in every gRPC request for audit trail and broker enforcement.
@@ -100,7 +140,7 @@ export type SessionContext = Message<"llm_multiverse.v1.SessionContext"> & {
  * Use `create(SessionContextSchema)` to create a new message.
  */
 export const SessionContextSchema: GenMessage<SessionContext> = /*@__PURE__*/
-  messageDesc(file_llm_multiverse_v1_common, 2);
+  messageDesc(file_llm_multiverse_v1_common, 3);
 
 /**
  * Structured error detail for gRPC error responses.
@@ -129,7 +169,7 @@ export type ErrorDetail = Message<"llm_multiverse.v1.ErrorDetail"> & {
  * Use `create(ErrorDetailSchema)` to create a new message.
  */
 export const ErrorDetailSchema: GenMessage<ErrorDetail> = /*@__PURE__*/
-  messageDesc(file_llm_multiverse_v1_common, 3);
+  messageDesc(file_llm_multiverse_v1_common, 4);
 
 /**
  * A candidate memory entry proposed by a subagent for persistence.
@@ -158,7 +198,7 @@ export type MemoryCandidate = Message<"llm_multiverse.v1.MemoryCandidate"> & {
  * Use `create(MemoryCandidateSchema)` to create a new message.
  */
 export const MemoryCandidateSchema: GenMessage<MemoryCandidate> = /*@__PURE__*/
-  messageDesc(file_llm_multiverse_v1_common, 4);
+  messageDesc(file_llm_multiverse_v1_common, 5);
 
 /**
  * Standardized return value from any subagent to its parent.
@@ -179,9 +219,11 @@ export type SubagentResult = Message<"llm_multiverse.v1.SubagentResult"> & {
   summary: string;
 
   /**
-   * @generated from field: repeated string artifacts = 3;
+   * Structured artifacts produced during the agent loop.
+   *
+   * @generated from field: repeated llm_multiverse.v1.Artifact artifacts = 3;
    */
-  artifacts: string[];
+  artifacts: Artifact[];
 
   /**
    * @generated from field: llm_multiverse.v1.ResultQuality result_quality = 4;
@@ -209,7 +251,7 @@ export type SubagentResult = Message<"llm_multiverse.v1.SubagentResult"> & {
  * Use `create(SubagentResultSchema)` to create a new message.
  */
 export const SubagentResultSchema: GenMessage<SubagentResult> = /*@__PURE__*/
-  messageDesc(file_llm_multiverse_v1_common, 5);
+  messageDesc(file_llm_multiverse_v1_common, 6);
 
 /**
  * Agent types with distinct tool permission manifests.
@@ -450,3 +492,49 @@ export enum ResultSource {
 export const ResultSourceSchema: GenEnum<ResultSource> = /*@__PURE__*/
   enumDesc(file_llm_multiverse_v1_common, 5);
 
+/**
+ * Type of artifact produced by an agent during its tool call loop.
+ *
+ * @generated from enum llm_multiverse.v1.ArtifactType
+ */
+export enum ArtifactType {
+  /**
+   * @generated from enum value: ARTIFACT_TYPE_UNSPECIFIED = 0;
+   */
+  UNSPECIFIED = 0,
+
+  /**
+   * Code written via fs_write
+   *
+   * @generated from enum value: ARTIFACT_TYPE_CODE = 1;
+   */
+  CODE = 1,
+
+  /**
+   * Plain text / file content from fs_read
+   *
+   * @generated from enum value: ARTIFACT_TYPE_TEXT = 2;
+   */
+  TEXT = 2,
+
+  /**
+   * Output from run_code / run_shell
+   *
+   * @generated from enum value: ARTIFACT_TYPE_COMMAND_OUTPUT = 3;
+   */
+  COMMAND_OUTPUT = 3,
+
+  /**
+   * Web search results
+   *
+   * @generated from enum value: ARTIFACT_TYPE_SEARCH_RESULT = 4;
+   */
+  SEARCH_RESULT = 4,
+}
+
+/**
+ * Describes the enum llm_multiverse.v1.ArtifactType.
+ */
+export const ArtifactTypeSchema: GenEnum<ArtifactType> = /*@__PURE__*/
+  enumDesc(file_llm_multiverse_v1_common, 6);
+