Add clickable run detail view to Jarvis run history; fix field mismatches

Each row in the Run History list now opens a Run Details sheet showing
the full, untruncated output/error (the old inline chevron-expand
capped output at 20 lines) plus duration, trigger, tokens, and cost.
Output/error use an explicit Copy button rather than
.textSelection(.enabled), to avoid the same Escape-beeps-instead-of-
dismissing bug just fixed in ModelInfoView.

While wiring this up, found the JarvisAgentRun model didn't match the
real oAI-Web API response shape: output decoded from a nonexistent
"output" key instead of "result" (always nil, hence "No output for
this run" even on successful runs with real content), finishedAt
decoded from "finished_at" instead of "ended_at" (Duration silently
never showed), and the status icon only recognized "completed"/
"failed" instead of the API's actual "success"/"error" values (plain
gray circle instead of a green checkmark). Fixed all three, verified
against a real API response, added 4 decoding tests.

oAI/Models/JarvisModels.swift

@@ -69,7 +69,7 @@ struct JarvisAgentInput: Codable, Sendable {
 struct JarvisAgentRun: Identifiable, Codable, Sendable {
     let id: String
     let agentId: String?
-    let status: String        // "running" | "completed" | "failed" | "stopped"
+    let status: String        // "running" | "success" | "failed"/"error" | "stopped" (server-observed; not formally documented)
     let startedAt: String?
     let finishedAt: String?
     let output: String?
@@ -80,10 +80,11 @@ struct JarvisAgentRun: Identifiable, Codable, Sendable {
     let triggerType: String?
 
     enum CodingKeys: String, CodingKey {
-        case id, status, output, error
+        case id, status, error
         case agentId       = "agent_id"
         case startedAt     = "started_at"
-        case finishedAt    = "finished_at"
+        case finishedAt    = "ended_at"
+        case output        = "result"
         case costUsd       = "cost_usd"
         case inputTokens   = "input_tokens"
         case outputTokens  = "output_tokens"