refactor(board): delete old board routes, absorb slackHandle into profile PATCH

- Delete server/api/members/me/board.patch.js and server/api/board/suggestions.get.js
- Add boardSlackHandle to memberProfileUpdateSchema; remove boardPrivacy
- profile.patch.js: write boardSlackHandle -> board.slackHandle; drop boardPrivacy
- Remove privacy.board field from Member model
- onboarding/status.get.js: hasProfileTags now requires only craftTags; hasEngagedBoard uses BoardPost.exists
- onboarding/track.post.js: graduation check uses BoardPost.exists instead of board.topics elemMatch
- members/[id].get.js and directory.get.js: reduce board response to slackHandle only; drop connectionTag and peerSupport filters

server/api/members/me/board.patch.js

@@ -1,70 +0,0 @@
-import Member from '../../../models/member.js'
-import { connectDB } from '../../../utils/mongoose.js'
-
-export default defineEventHandler(async (event) => {
-  await connectDB()
-  const member = await requireAuth(event)
-
-  const body = await validateBody(event, boardUpdateSchema)
-
-  const updateData = {
-    'board.topics': body.topics || [],
-    'board.offerPeerSupport': body.offerPeerSupport || false,
-    'board.availability': body.availability || '',
-    'board.slackHandle': body.slackHandle || '',
-    'board.personalMessage': body.personalMessage || '',
-    'board.details': body.details || '',
-  }
-
-  if (body.offerPeerSupport && body.slackHandle) {
-    try {
-      const { getSlackService } = await import('../../../utils/slack.ts')
-      const slackService = getSlackService()
-
-      if (slackService) {
-        const slackUserId = await slackService.findUserIdByUsername(body.slackHandle)
-        if (slackUserId) {
-          updateData.slackUserId = slackUserId
-        } else {
-          console.warn(
-            `[Board] Could not find Slack user ID for handle: ${body.slackHandle}`,
-          )
-        }
-      }
-    } catch (error) {
-      console.error('[Board] Error fetching Slack user ID:', error.message)
-    }
-  }
-
-  try {
-    const updated = await Member.findByIdAndUpdate(
-      member._id,
-      { $set: updateData },
-      { new: true, runValidators: true },
-    )
-
-    if (!updated) {
-      throw createError({
-        statusCode: 404,
-        statusMessage: 'Member not found',
-      })
-    }
-
-    logActivity(member._id, 'board_updated', {
-      topicCount: (body.topics || []).length,
-      offerPeerSupport: body.offerPeerSupport || false,
-    })
-
-    return {
-      success: true,
-      board: updated.board,
-    }
-  } catch (error) {
-    if (error.statusCode) throw error
-    console.error('Board update error:', error)
-    throw createError({
-      statusCode: 500,
-      statusMessage: 'Failed to update board settings',
-    })
-  }
-})