Mega push vol 3

supabase/migrations/012_task_comments.sql

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+-- Task comments for kanban cards
+
+CREATE TABLE IF NOT EXISTS kanban_comments (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    card_id UUID NOT NULL REFERENCES kanban_cards(id) ON DELETE CASCADE,
+    user_id UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,
+    content TEXT NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now(),
+    updated_at TIMESTAMPTZ DEFAULT now()
+);
+
+-- Enable RLS
+ALTER TABLE kanban_comments ENABLE ROW LEVEL SECURITY;
+
+-- Comments inherit access from the card's board -> org
+CREATE POLICY "Comments inherit card access" ON kanban_comments
+    FOR SELECT USING (
+        EXISTS (
+            SELECT 1 FROM kanban_cards c
+            JOIN kanban_columns col ON c.column_id = col.id
+            JOIN kanban_boards b ON col.board_id = b.id
+            JOIN org_members m ON b.org_id = m.org_id
+            WHERE c.id = kanban_comments.card_id
+            AND m.user_id = auth.uid()
+        )
+    );
+
+-- Users can insert their own comments
+CREATE POLICY "Users can insert own comments" ON kanban_comments
+    FOR INSERT WITH CHECK (
+        user_id = auth.uid() AND
+        EXISTS (
+            SELECT 1 FROM kanban_cards c
+            JOIN kanban_columns col ON c.column_id = col.id
+            JOIN kanban_boards b ON col.board_id = b.id
+            JOIN org_members m ON b.org_id = m.org_id
+            WHERE c.id = kanban_comments.card_id
+            AND m.user_id = auth.uid()
+        )
+    );
+
+-- Users can update their own comments
+CREATE POLICY "Users can update own comments" ON kanban_comments
+    FOR UPDATE USING (user_id = auth.uid());
+
+-- Users can delete their own comments
+CREATE POLICY "Users can delete own comments" ON kanban_comments
+    FOR DELETE USING (user_id = auth.uid());
+
+-- Index for faster lookups
+CREATE INDEX IF NOT EXISTS idx_kanban_comments_card ON kanban_comments(card_id);
+CREATE INDEX IF NOT EXISTS idx_kanban_comments_user ON kanban_comments(user_id);
+CREATE INDEX IF NOT EXISTS idx_kanban_comments_created ON kanban_comments(created_at DESC);