feat: normalize URLs without scheme to https://

- Add normalize_url() helper function in commands.py
- Automatically prefix URLs without scheme (e.g. github.com → https://github.com)
- Applies to both -link flag and auto-detected URLs
- Add 5 new tests for URL normalization
- Fix existing tests to handle 5-value return from parse_args()

Examples:
  /add Fix bug github.com/user/repo
  → stored as: https://github.com/user/repo

apps/telegram-bot/tests/test_commands.py

@@ -52,75 +52,97 @@ class TestExtractArgs:
 
 class TestParseArgs:
     def test_text_only(self):
-        text, link, due = parse_args(["hello", "world"])
+        text, link, due, _, _ = parse_args(["hello", "world"])
         assert text == "hello world"
         assert link is None
         assert due is None
 
     def test_link_extracted(self):
-        text, link, due = parse_args(["hello", "https://example.com"])
+        text, link, due, _, _ = parse_args(["hello", "https://example.com"])
         # "hello" is non-link non-date → becomes text; only the URL becomes link
         assert text == "hello"
         assert link == "https://example.com"
         assert due is None
 
     def test_text_and_link(self):
-        text, link, due = parse_args(["hello", "world", "https://example.com"])
+        text, link, due, _, _ = parse_args(["hello", "world", "https://example.com"])
         assert text == "hello world"
         assert link == "https://example.com"
 
     def test_due_date_parsed(self):
-        text, link, due = parse_args(["hello", "tomorrow"])
+        text, link, due, _, _ = parse_args(["hello", "tomorrow"])
         assert text == "hello"
         assert due is not None
         # Should be some time in the future
         assert due > int(time.time())
 
     def test_all_three(self):
-        text, link, due = parse_args(["hello", "https://example.com", "tomorrow"])
+        text, link, due, _, _ = parse_args(["hello", "https://example.com", "tomorrow"])
         assert text == "hello"
         assert link == "https://example.com"
         assert due is not None
 
     def test_http_and_https_both_detected(self):
-        _, link1, _ = parse_args(["http://example.com"])
-        _, link2, _ = parse_args(["https://example.com"])
+        _, link1, _, _, _ = parse_args(["http://example.com"])
+        _, link2, _, _, _ = parse_args(["https://example.com"])
         assert link1 == "http://example.com"
         assert link2 == "https://example.com"
 
     def test_non_url_non_date_becomes_text(self):
-        text, link, due = parse_args(["fix", "the", "bug"])
+        text, link, due, _, _ = parse_args(["fix", "the", "bug"])
         assert text == "fix the bug"
         assert link is None
         assert due is None
 
     def test_multiple_links_first_only(self):
-        _, link, _ = parse_args(["text", "https://first.com", "https://second.com"])
+        _, link, _, _, _ = parse_args(["text", "https://first.com", "https://second.com"])
         assert link == "https://first.com"
 
     def test_due_date_after_link(self):
-        text, link, due = parse_args(["task", "https://example.com", "in 5 days"])
+        text, link, due, _, _ = parse_args(["task", "https://example.com", "in 5 days"])
         assert text == "task"
         assert link == "https://example.com"
         assert due is not None
 
     def test_empty_args(self):
-        text, link, due = parse_args([])
+        text, link, due, _, _ = parse_args([])
         assert text is None
         assert link is None
         assert due is None
 
     def test_date_parser_failure_returns_none(self):
         # "asdfjkl" is not parseable → goes to text
-        text, link, due = parse_args(["hello", "asdfjkl"])
+        text, link, due, _, _ = parse_args(["hello", "asdfjkl"])
         assert text == "hello asdfjkl"
         assert due is None
 
     def test_link_takes_first_match(self):
         # Even if it's not a valid URL, starts with https://
-        _, link, _ = parse_args(["skip", "https://not-real.but-still-a-link"])
+        _, link, _, _, _ = parse_args(["skip", "https://not-real.but-still-a-link"])
         assert link == "https://not-real.but-still-a-link"
 
+    def test_url_without_scheme_normalized_to_https(self):
+        """URLs without scheme should get https:// prefix."""
+        _, link, _, _, _ = parse_args(["github.com/user/repo"])
+        assert link == "https://github.com/user/repo"
+
+    def test_url_without_scheme_github_normalized(self):
+        text, link, _, _, _ = parse_args(["Fix bug", "github.com/owner/repo"])
+        assert text == "Fix bug"
+        assert link == "https://github.com/owner/repo"
+
+    def test_url_with_explicit_https_unchanged(self):
+        _, link, _, _, _ = parse_args(["task", "https://example.com/page"])
+        assert link == "https://example.com/page"
+
+    def test_url_with_http_unchanged(self):
+        _, link, _, _, _ = parse_args(["task", "http://example.com/page"])
+        assert link == "http://example.com/page"
+
+    def test_url_link_flag_without_scheme_normalized(self):
+        _, link, _, _, _ = parse_args(["-link", "example.com/path"])
+        assert link == "https://example.com/path"
+
 
 class TestFormatBounty:
     def _row(