feat: prompt template tech debt — tests, read-only endpoints, double-… (#67)

* feat: prompt template tech debt — tests, read-only endpoints, double-load fix, server creation modal

Close test coverage gaps for prompt templates:
- Resume with deleted template: verifies graceful degradation (template_content=None, warning logged)
- Threading safety: concurrent set_template/init_system_messages with no race conditions
- Factory passthrough: template kwarg propagation through WorkstreamManager.create()

Add read-only template listing endpoints (read scope, no content exposed):
- GET /v1/api/templates — prompt template summaries (name, category, is_default, origin)
- GET /v1/api/ws-templates — enabled workstream template summaries (name, description, model)
- Available on both server and console; Python + TypeScript SDK methods added
- Console creation modal switched from admin endpoint to read-scope endpoint

Eliminate double-load inefficiency in workstream creation:
- Template validation moved before mgr.create() (no create-then-rollback on invalid template)
- template kwarg plumbed through WorkstreamManager.create() and session factory
- _SessionFactory Protocol added for proper mypy typing

Add workstream creation modal to server web UI:
- Name, model, template dropdown, ws_template/profile dropdown
- Instrument panel aesthetic: gradient top border, blur backdrop, amber accent
- Focus trap, Escape/Enter keyboard handling, loading state, error display
- WCAG AA contrast compliance, reduced-motion support

* fix: add list_ws_templates SDK methods + regenerate OpenAPI snapshots

Add list_ws_templates() to Python SDK (async + sync) and listWsTemplates()
to TypeScript SDK for the new GET /v1/api/ws-templates server endpoint.
Add WsTemplateSummary + ListWsTemplateSummaryResponse TypeScript types.
Regenerate openapi-server.json and openapi-console.json snapshots.

Addresses Copilot review feedback on PR #67.

* fix: skip template pre-validation when resuming a workstream

When resume_ws is set, the request's template field is irrelevant —
resume() restores the template from workstream_config. Pre-validating
a stale template name would incorrectly return 400 before the resume
even runs.

Addresses Copilot review feedback on PR #67.

sdk/typescript/openapi-console.json

@@ -2,7 +2,7 @@
   "openapi": "3.1.0",
   "info": {
     "title": "turnstone Console API",
-    "version": "0.6.1",
+    "version": "0.6.2",
     "description": "Cluster-wide visibility and control across all turnstone nodes."
   },
   "paths": {
@@ -2052,6 +2052,27 @@
         }
       }
     },
+    "/v1/api/templates": {
+      "get": {
+        "summary": "List available prompt templates (summary)",
+        "operationId": "v1_api_templates_get",
+        "tags": [
+          "Templates"
+        ],
+        "responses": {
+          "200": {
+            "description": "Success",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ListPromptTemplateSummaryResponse"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/v1/api/admin/usage": {
       "get": {
         "summary": "Aggregated usage data",
@@ -5947,6 +5968,54 @@
         },
         "title": "McpReloadResponse",
         "type": "object"
+      },
+      "PromptTemplateSummary": {
+        "properties": {
+          "name": {
+            "description": "Template name",
+            "title": "Name",
+            "type": "string"
+          },
+          "category": {
+            "default": "",
+            "description": "Template category",
+            "title": "Category",
+            "type": "string"
+          },
+          "is_default": {
+            "default": false,
+            "description": "Whether this template is applied by default",
+            "title": "Is Default",
+            "type": "boolean"
+          },
+          "origin": {
+            "default": "manual",
+            "description": "Template origin: manual or mcp",
+            "title": "Origin",
+            "type": "string"
+          }
+        },
+        "required": [
+          "name"
+        ],
+        "title": "PromptTemplateSummary",
+        "type": "object"
+      },
+      "ListPromptTemplateSummaryResponse": {
+        "properties": {
+          "templates": {
+            "items": {
+              "$ref": "#/components/schemas/PromptTemplateSummary"
+            },
+            "title": "Templates",
+            "type": "array"
+          }
+        },
+        "required": [
+          "templates"
+        ],
+        "title": "ListPromptTemplateSummaryResponse",
+        "type": "object"
       }
     }
   }