Merge origin/main into claude/hermes-context-loss-fayw61 (2.5.4)

Keeps main's neutral default instructions (assistant name now comes from the
settings) together with the new guidance on long replies and continuity;
bumps to 2.5.4 since main already published 2.5.3.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ln4KL1feHtnV4nee4sZFhM

package.json

@@ -1,7 +1,7 @@
 {
   "name": "eveflow",
-  "version": "2.5.3",
-  "releaseVersion": "2.5.3",
+  "version": "2.5.4",
+  "releaseVersion": "2.5.4",
   "description": "JARVIS-style desktop HUD for Hermes Agent: voice, streaming runs, scheduled jobs, skills and telemetry",
   "main": "dist-electron/main.js",
   "private": true,