Fix projects.map crash on API error response

Added res.ok guards on projects and time-tracking pages so that
setProjects receives [] instead of an error object when the API
returns a non-200 response.

src/app/(dashboard)/projects/page.tsx

@@ -62,9 +62,10 @@ export default function ProjectsPage() {
       if (search) params.set("search", search)
       if (statusFilter !== "all") params.set("status", statusFilter)
       const res = await fetch(`/api/projects?${params}`)
-      setProjects(await res.json())
+      if (res.ok) setProjects(await res.json()); else setProjects([])
     } catch (e) {
       console.error("Failed to load projects", e)
+      setProjects([])
     } finally {
       setLoading(false)
     }

src/app/(dashboard)/time-tracking/page.tsx

@@ -52,11 +52,13 @@ export default function TimeTrackingPage() {
         fetch("/api/time-entries/summary"),
         fetch("/api/projects"),
       ])
-      setEntries(await eRes.json())
-      setSummary(await sRes.json())
-      setProjects(await pRes.json())
+      if (eRes.ok) setEntries(await eRes.json()); else setEntries([])
+      if (sRes.ok) setSummary(await sRes.json()); else setSummary(null)
+      if (pRes.ok) setProjects(await pRes.json()); else setProjects([])
     } catch (e) {
       console.error("Failed to load time data", e)
+      setEntries([])
+      setProjects([])
     } finally {
       setLoading(false)
     }