feat(qqbot): add inline-keyboard approvals and update prompts

The QQ Bot v2 API supports inline keyboards on outbound messages. When a
user taps a button, the platform dispatches an INTERACTION_CREATE
gateway event; the bot ACKs it via PUT /interactions/{id} and decodes
the button's data payload to route the click.

This commit adds:

New module gateway/platforms/qqbot/keyboards.py

- Inline-keyboard dataclasses (InlineKeyboard, KeyboardRow, KeyboardButton,
  KeyboardButtonAction, KeyboardButtonRenderData, KeyboardButtonPermission)
  that serialize to the JSON shape the QQ API expects.
- build_approval_keyboard(session_key) — 3-button layout:
  ✅ 允许一次 / ⭐ 始终允许 / ❌ 拒绝, all sharing group_id='approval'
  so clicking one greys out the rest.
- build_update_prompt_keyboard() — Yes/No keyboard for update confirms.
- parse_approval_button_data() / parse_update_prompt_button_data() —
  decode the button_data payload from INTERACTION_CREATE.
  approve:<session_key>:<decision>  (decision = allow-once|allow-always|deny)
  update_prompt:<answer>            (answer = y|n)
- build_approval_text(ApprovalRequest) — markdown renderer for the
  surrounding message body (exec-approval and plugin-approval variants,
  with severity icons 🔴/🔵/🟡).
- parse_interaction_event(raw) → InteractionEvent dataclass — normalizes
  the nested raw payload (id / scene / openids / button_data / etc.).

Adapter changes (gateway/platforms/qqbot/adapter.py)

- _dispatch_payload routes INTERACTION_CREATE → _on_interaction.
- _on_interaction parses the event, ACKs via PUT /interactions/{id}, then
  invokes a user-registered interaction callback. Exceptions from the
  callback are caught and logged (never propagate into the WS loop).
- set_interaction_callback(cb) lets gateway wiring register a routing
  handler that inspects button_data and resolves the corresponding
  pending approval / update prompt.
- _send_c2c_text / _send_group_text now accept an optional keyboard kwarg
  and append it to the outbound body.
- send_with_keyboard(chat_id, content, keyboard, reply_to=None) — public
  helper that sends a single short message with a keyboard attached.
  Does NOT chunk-split (a keyboard message has one interactive surface).
  Guild chats are rejected non-retryably — they don't support keyboards.
- send_approval_request(chat_id, ApprovalRequest, reply_to=None) +
  send_update_prompt(chat_id, content, reply_to=None) — convenience
  wrappers over send_with_keyboard.

Tests

27 new unit tests under TestApprovalButtonData, TestUpdatePromptButtonData,
TestBuildApprovalKeyboard, TestBuildUpdatePromptKeyboard, TestBuildApprovalText,
TestInteractionEventParsing, and TestAdapterInteractionDispatch. Cover:

- Button-data round-trip (build → parse returns original session/decision)
- Keyboard JSON shape + mutual-exclusion group_id
- Exec vs plugin approval text templates + severity icons
- Interaction event parsing (c2c / group / guild scene codes)
- _on_interaction end-to-end: ACK invoked, callback receives parsed event,
  callback exceptions are swallowed, missing id skips ACK, no registered
  callback is harmless.

Full qqbot suite: 118 passed (72 existing + 19 chunked + 27 keyboards).

Co-authored-by: WideLee <limkuan24@gmail.com>

gateway/platforms/qqbot/__init__.py

@@ -41,6 +41,20 @@ from .chunked_upload import (  # noqa: F401
     UploadFileTooLargeError,
 )
 
+# -- Inline keyboards ------------------------------------------------------
+from .keyboards import (  # noqa: F401
+    ApprovalRequest,
+    ApprovalSender,
+    InlineKeyboard,
+    InteractionEvent,
+    build_approval_keyboard,
+    build_approval_text,
+    build_update_prompt_keyboard,
+    parse_approval_button_data,
+    parse_interaction_event,
+    parse_update_prompt_button_data,
+)
+
 __all__ = [
     # adapter
     "QQAdapter",
@@ -63,4 +77,15 @@ __all__ = [
     "ChunkedUploader",
     "UploadDailyLimitExceededError",
     "UploadFileTooLargeError",
+    # keyboards
+    "ApprovalRequest",
+    "ApprovalSender",
+    "InlineKeyboard",
+    "InteractionEvent",
+    "build_approval_keyboard",
+    "build_approval_text",
+    "build_update_prompt_keyboard",
+    "parse_approval_button_data",
+    "parse_interaction_event",
+    "parse_update_prompt_button_data",
 ]