fix: simplify Ticket reporting and speed up browser lists

Remove model-supplied assignment and retry identities from implementation reports; retain Host idempotency, authentication and notification evidence.

Add a SQL-only browser projection and decouple auxiliary page loads. Preserve authoritative MR evidence queries. Include regression tests and component benchmarks, documenting the remaining no-match search cost.

crates/server-api/src/lib.rs

@@ -9,6 +9,8 @@ pub use api_macros::{ApiContract, BinaryBody, HttpMethod, TransportMetadata, Web
 mod drive;
 mod notification;
 pub use notification::*;
+mod ticket_browse;
+pub use ticket_browse::*;
 pub mod repository_openapi_typescript;
 pub use drive::*;
 mod workspace_config;
@@ -376,6 +378,8 @@ impl_openapi_schema!(
     TicketAssignmentDiagnosticsPage,
     TicketQueryRequest,
     TicketQueryResponse,
+    TicketBrowseQueryRequest,
+    TicketBrowseQueryResponse,
     TicketQueueResponse,
     TicketRecord,
     TicketRecordRef,
@@ -3033,6 +3037,14 @@ pub trait ServerApi {
         #[body] request: TicketTagsSetRequest,
     ) -> Result<WorkspaceTicketTagList, RepositoryApiError>;
 
+    /// Lightweight browser list; deliberately excludes live MR evidence and external observations.
+    #[post("/api/w/{workspace_id}/tickets/browse", status = 200, error_status = 400, additional_error_statuses = [401, 403, 404, 500], bearer_auth = true, browser_auth = true)]
+    async fn ticket_browse(
+        &self,
+        #[path] workspace_id: String,
+        #[body] request: TicketBrowseQueryRequest,
+    ) -> Result<TicketBrowseQueryResponse, RepositoryApiError>;
+
     #[post("/api/w/{workspace_id}/tickets/query", status = 200, error_status = 400, additional_error_statuses = [401, 403, 404, 500], bearer_auth = true, browser_auth = true)]
     async fn ticket_query(
         &self,
@@ -8058,9 +8070,8 @@ pub enum TicketImplementationResultKind {
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
 #[serde(deny_unknown_fields)]
 pub struct TicketImplementationResultRequest {
+    /// Host-owned replay identity; model-facing tools derive it from the Tool call.
     pub operation_key: String,
-    pub assignment_id: String,
-    pub orchestrator_assignment_id: String,
     pub kind: TicketImplementationResultKind,
     pub body: String,
     pub merge_request: Option<MergeRequestReviewSubject>,

crates/server-api/src/repository_openapi_typescript.rs

@@ -459,6 +459,13 @@ fn validate_ticket_browser_operations(
             request: Some("TicketTagSetRequest"),
             successes: &[("200", "Array_of_WorkspaceTag")],
         },
+        OperationContract {
+            path: "/api/w/{workspace_id}/tickets/browse",
+            method: "post",
+            operation_id: "ticket_browse",
+            request: Some("TicketBrowseQueryRequest"),
+            successes: &[("200", "TicketBrowseQueryResponse")],
+        },
         OperationContract {
             path: "/api/w/{workspace_id}/tickets/query",
             method: "post",

crates/server-api/src/ticket_browse.rs

@@ -0,0 +1,65 @@
+//! Lightweight Tickets browser contract, separate from authoritative evidence queries.
+use crate::{BrowserTicketState, QueryPage};
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
+#[cfg_attr(feature = "typescript", derive(ts_rs::TS))]
+#[serde(deny_unknown_fields)]
+pub struct TicketBrowseQueryRequest {
+    pub query: Option<String>,
+    #[serde(default)]
+    #[cfg_attr(feature = "typescript", ts(type = "Array<BrowserTicketState>"))]
+    pub states: Vec<ticket::TicketState>,
+    /// Every supplied active tag ID must match (AND).
+    #[serde(default)]
+    pub tag_ids: Vec<String>,
+    #[cfg_attr(
+        feature = "typescript",
+        ts(type = "TicketAssignmentPrincipalSnapshot | null")
+    )]
+    pub assigned_principal: Option<ticket::TicketAssignmentPrincipalSnapshot>,
+    #[cfg_attr(
+        feature = "typescript",
+        ts(type = "TicketAssignmentTrackingStatus | null")
+    )]
+    pub handling_status: Option<ticket::TicketAssignmentTrackingStatus>,
+    /// Exact current closed-case reason; historical reasons do not match this filter.
+    #[cfg_attr(feature = "typescript", ts(type = "TicketClosureReason | null"))]
+    pub closure_reason: Option<ticket::TicketClosureReason>,
+    /// Only updated_desc is supported; defaults to updated_desc.
+    pub sort: Option<String>,
+    #[schemars(range(min = 0, max = 1000))]
+    pub limit: Option<usize>,
+    /// Browse-only cursor bound to the Workspace, canonical filters, and sort.
+    pub cursor: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
+#[cfg_attr(feature = "typescript", derive(ts_rs::TS))]
+#[serde(deny_unknown_fields)]
+pub struct TicketBrowseQueryItem {
+    pub id: String,
+    pub resource_key: String,
+    pub title: String,
+    pub state: BrowserTicketState,
+    pub updated_at: Option<String>,
+    #[cfg_attr(feature = "typescript", ts(type = "Array<WorkspaceTag>"))]
+    pub tags: Vec<ticket::WorkspaceTag>,
+    #[cfg_attr(feature = "typescript", ts(type = "TicketClosureJudgment | null"))]
+    pub current_closure: Option<ticket::TicketClosureJudgment>,
+    #[cfg_attr(
+        feature = "typescript",
+        ts(type = "Array<TicketAssignmentTrackingProjection>")
+    )]
+    pub assignment_tracking: Vec<ticket::TicketAssignmentTrackingProjection>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
+#[cfg_attr(feature = "typescript", derive(ts_rs::TS))]
+#[serde(deny_unknown_fields)]
+pub struct TicketBrowseQueryResponse {
+    pub items: Vec<TicketBrowseQueryItem>,
+    pub page: QueryPage,
+    pub record_authority: String,
+}