Fix: Date-Panic in Wissensbasis (chrono::NaiveDateTime)

- mysql_async mit chrono-Feature für NaiveDateTime-Support
- 7 SELECTs in knowledge.rs von String auf NaiveDateTime umgestellt
- Timestamps werden jetzt korrekt formatiert statt Panic

Getestet:
- Wissens-Suche funktioniert ohne Crash
- Handlanger-Modus Chat-Antwort erscheint
- VSCodium-Extension Verbindung OK

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -30,3 +30,4 @@ package-lock.json
 .claude/scheduled_tasks.lock
 vscode-extension/out/
 vscode-extension/node_modules/
+*.vsix

src-tauri/Cargo.lock

@@ -2521,6 +2521,7 @@ dependencies = [
  "byteorder",
  "bytes",
  "cc",
+ "chrono",
  "cmake",
  "crc32fast",
  "flate2",

src-tauri/Cargo.toml

@@ -21,7 +21,7 @@ tokio = { version = "1", features = ["full"] }
 chrono = { version = "0.4", features = ["serde"] }
 uuid = { version = "1", features = ["v4", "serde"] }
 rusqlite = { version = "0.31", features = ["bundled"] }
-mysql_async = "0.34"
+mysql_async = { version = "0.34", features = ["chrono"] }
 reqwest = { version = "0.12", features = ["json", "multipart"] }
 base64 = "0.22"
 tokio-tungstenite = "0.23"

src-tauri/src/knowledge.rs

@@ -3,6 +3,7 @@
 
 use mysql_async::{Pool, prelude::*};
 use serde::{Deserialize, Serialize};
+use chrono::NaiveDateTime;
 
 /// Verbindungskonfiguration
 const MYSQL_HOST: &str = "192.168.155.11";
@@ -91,11 +92,13 @@ pub async fn search_knowledge(
             LIMIT ?"#,
             (&query, &query, &cat, limit),
             |(id, category, title, content, tags, priority, status, related_ids, source, created_at, updated_at, relevance):
-             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, String, String, f64)| {
+             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, NaiveDateTime, NaiveDateTime, f64)| {
                 SearchResult {
                     entry: KnowledgeEntry {
                         id, category, title, content, tags, priority, status,
-                        related_ids, source, created_at, updated_at,
+                        related_ids, source,
+                        created_at: created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+                        updated_at: updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
                     },
                     relevance,
                 }
@@ -113,11 +116,13 @@ pub async fn search_knowledge(
             LIMIT ?"#,
             (&query, &query, limit),
             |(id, category, title, content, tags, priority, status, related_ids, source, created_at, updated_at, relevance):
-             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, String, String, f64)| {
+             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, NaiveDateTime, NaiveDateTime, f64)| {
                 SearchResult {
                     entry: KnowledgeEntry {
                         id, category, title, content, tags, priority, status,
-                        related_ids, source, created_at, updated_at,
+                        related_ids, source,
+                        created_at: created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+                        updated_at: updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
                     },
                     relevance,
                 }
@@ -145,10 +150,12 @@ pub async fn get_knowledge(id: i64) -> Result<Option<KnowledgeEntry>, String> {
         (id,)
     ).await.map_err(|e| e.to_string())?
     .map(|(id, category, title, content, tags, priority, status, related_ids, source, created_at, updated_at):
-          (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, String, String)| {
+          (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, NaiveDateTime, NaiveDateTime)| {
         KnowledgeEntry {
             id, category, title, content, tags, priority, status,
-            related_ids, source, created_at, updated_at,
+            related_ids, source,
+            created_at: created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+            updated_at: updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
         }
     });
 
@@ -223,10 +230,12 @@ pub async fn get_recent_knowledge(
                LIMIT ?"#,
             (&cat, limit),
             |(id, category, title, content, tags, priority, status, related_ids, source, created_at, updated_at):
-             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, String, String)| {
+             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, NaiveDateTime, NaiveDateTime)| {
                 KnowledgeEntry {
                     id, category, title, content, tags, priority, status,
-                    related_ids, source, created_at, updated_at,
+                    related_ids, source,
+                    created_at: created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+                    updated_at: updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
                 }
             }
         ).await.map_err(|e| e.to_string())?
@@ -240,10 +249,12 @@ pub async fn get_recent_knowledge(
                LIMIT ?"#,
             (limit,),
             |(id, category, title, content, tags, priority, status, related_ids, source, created_at, updated_at):
-             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, String, String)| {
+             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, NaiveDateTime, NaiveDateTime)| {
                 KnowledgeEntry {
                     id, category, title, content, tags, priority, status,
-                    related_ids, source, created_at, updated_at,
+                    related_ids, source,
+                    created_at: created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+                    updated_at: updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
                 }
             }
         ).await.map_err(|e| e.to_string())?
@@ -322,10 +333,12 @@ pub async fn get_tool_hints(
                LIMIT 3"#,
             (&cat, &query_string),
             |(id, category, title, content, tags, priority, status, related_ids, source, created_at, updated_at):
-             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, String, String)| {
+             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, NaiveDateTime, NaiveDateTime)| {
                 KnowledgeEntry {
                     id, category, title, content, tags, priority, status,
-                    related_ids, source, created_at, updated_at,
+                    related_ids, source,
+                    created_at: created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+                    updated_at: updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
                 }
             }
         ).await.map_err(|e| e.to_string())?
@@ -340,10 +353,12 @@ pub async fn get_tool_hints(
                LIMIT 3"#,
             (&query_string,),
             |(id, category, title, content, tags, priority, status, related_ids, source, created_at, updated_at):
-             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, String, String)| {
+             (i64, String, String, String, Option<String>, i32, String, Option<String>, Option<String>, NaiveDateTime, NaiveDateTime)| {
                 KnowledgeEntry {
                     id, category, title, content, tags, priority, status,
-                    related_ids, source, created_at, updated_at,
+                    related_ids, source,
+                    created_at: created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+                    updated_at: updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
                 }
             }
         ).await.map_err(|e| e.to_string())?