fix(parser): exclude @todo from contexts and support quoted location metadata

- Prevents '@todo' from being added to task contexts.
- Adds parsing for location metadata with quoted values, allowing
  spaces.

internal/parser/parser.go

@@ -172,7 +172,29 @@ func ParseLine(line string) (Task, error) {
 			continue
 		}
 		if strings.HasPrefix(tok, "@") && len(tok) > 1 {
+			if tok != "@todo" { // exclude @todo context
 				t.Contexts = append(t.Contexts, tok[1:])
+			}
+			continue
+		}
+		// Special case: location:"value with spaces"
+		if strings.HasPrefix(tok, "location:\"") {
+			val := tok[len("location:\""):]
+			for {
+				// If token ends with a quote, we've reached the end
+				if strings.HasSuffix(val, "\"") {
+					val = val[:len(val)-1]
+					break
+				}
+				// Otherwise, append next token
+				i++
+				if i >= len(toks) {
+					// Unterminated quote, treat as is
+					break
+				}
+				val += " " + toks[i]
+			}
+			t.Metadata["location"] = val
 			continue
 		}
 		if !strings.ContainsAny(tok, " \t") && strings.Contains(tok, ":") {